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• Create a new site from the hamburger and pick up the theme you find most appropriate • Use the Red Plus button in the lower right corner to bring out the block panel and chose the blocks you need. • You can move and delete freely any block with the Green Arrows and the Red Trash buttons appearing in its top-right corner.

• Set the appearance options you need in the Block Properties panel – the Blue Gear button between Move and Delete ones • Insert your content just like you would if you were using an ordinary text editor – deleting the dummy text and typing your own. The inline editor gives you additional options a click away • Blocks are ordered giving you a hint for the way a web site is commonly organized • Change the entire appearance thought the Style Editor – the Blue Brush over the Plus Button at any time. • When you decide you need an extra page – just add one from Hamburger >Pages or duplicate existing page through the Green Copy button next to page’s name.

• Change the view between Desktop, Tablet and Mobile, preview or publish your work at any time with the buttons in the white top bar. • After having tested your free version of Visual Slideshow I'm interested in buying the license. I believe your product creates a quick and easy workflow. • Your software does not seem to like vertical images no matter which image options I choose in the tools menu. Shrink large or stretch small, it still cuts off heads. • I downloaded and ran the exe, but couldn't get it to start in win 7 Home Premium.

What did I do wrong? • Hi I am very interested in your product. I am testing it on a web site I am trying to complete, but after I loaded everything to the server the slider images display in a column. • Why am I getting renewal notices that state I am expiring this month.

Think your system is a bit confusing, and not sure if I will fall for the renewal next year. Thought I bought a lifetime license for what I had. • I purchased the unlimited version of Visual Slideshow and I am trying to do 2 different slide shows on the same website but different pages and it is not allowing me to have 2 different sizes for each page. What is the issue. • Hello, I have saved all my slideshows on my computer. Recently I changed computers, I transferred all the Project files/Galleries to the new computer.

On the new computer I can still see the slideshow name, I can see f.i. • Is it possible to add a link to images in a slideshow? I'm working with a florist who wants to be able for people to click on a floral arrangement to pay and order. Please let me know.

• I'm trying yours slideshow program but I can't display 'portrait' pictures correctly. What I’m doing wrong? • Can you please confirm that it will allow me to get all the new templates that have come out since I last updated? I didn't realize that the updates were new templates, and never updated after the initial download a year ago.

HTML5 A vocabulary and associated APIs for HTML and XHTML W3C Recommendation 28 October 2014 – – • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 4.10 Forms 4.10.1 Introduction This section is non-normative. A form is a component of a Web page that has form controls, such as text fields, buttons, checkboxes, range controls, or color pickers. A user can interact with such a form, providing data that can then be sent to the server for further processing (e.g. Returning the results of a search or calculation). No client-side scripting is needed in many cases, though an API is available so that scripts can augment the user experience or use forms for purposes other than submitting data to a server. Writing a form consists of several steps, which can be performed in any order: writing the user interface, implementing the server-side processing, and configuring the user interface to communicate with the server.

4.10.1.1 Writing a form's user interface This section is non-normative. For the purposes of this brief introduction, we will create a pizza ordering form. Any form starts with a element, inside which are placed the controls. Most controls are represented by the element, which by default provides a one-line text field. To label a control, the element is used; the label text and the control itself go inside the element. Each part of a form is considered a, and is typically separated from other parts using elements.

Putting this together, here is how one might ask for the customer's name: Customer name: To let the user select the size of the pizza, we can use a set of radio buttons. Radio buttons also use the element, this time with a attribute with the value.

To make the radio buttons work as a group, they are given a common name using the attribute. To group a batch of controls together, such as, in this case, the radio buttons, one can use the element. The title of such a group of controls is given by the first element in the, which has to be a element. Customer name: Pizza Size Small Medium Large Changes from the previous step are highlighted.

To pick toppings, we can use checkboxes. These use the element with a attribute with the value: Customer name: Pizza Size Small Medium Large Pizza Toppings Bacon Extra Cheese Onion Mushroom The pizzeria for which this form is being written is always making mistakes, so it needs a way to contact the customer. For this purpose, we can use form controls specifically for telephone numbers ( elements with their attribute set to ) and e-mail addresses ( elements with their attribute set to ): Customer name: Telephone: E-mail address: Pizza Size Small Medium Large Pizza Toppings Bacon Extra Cheese Onion Mushroom We can use an element with its attribute set to to ask for a delivery time. Many of these form controls have attributes to control exactly what values can be specified; in this case, three attributes of particular interest are,, and. These set the minimum time, the maximum time, and the interval between allowed values (in seconds). This pizzeria only delivers between 11am and 9pm, and doesn't promise anything better than 15 minute increments, which we can mark up as follows: Customer name: Telephone: E-mail address: Pizza Size Small Medium Large Pizza Toppings Bacon Extra Cheese Onion Mushroom Preferred delivery time: The element can be used to provide a free-form text field. The autocomplete IDL attribute must the content attribute of the same name,.

The name IDL attribute must the content attribute of the same name. The acceptCharset IDL attribute must the content attribute. The elements IDL attribute must return an rooted at the node while the element is and rooted at the element itself when it is not, whose filter matches whose is the element, with the exception of elements whose attribute is in the state, which must, for historical reasons, be excluded from this particular collection. The length IDL attribute must return the number of nodes by the collection. The at any instant are the indices supported by the object returned by the attribute at that instant. When a element is indexed for indexed property retrieval, the user agent must return the value returned by the item method on the collection, when invoked with the given index as its argument. Each element has a mapping of names to elements called the past names map. Ravenloft Tarokka Deck Pdf.

It is used to persist names of controls even when they change names. The consist of the names obtained from the following algorithm, in the order obtained from this algorithm: • Let sourced names be an initially empty ordered list of tuples consisting of a string, an element, a source, where the source is either id, name, or past, and, if the source is past, an age.

• For each candidate whose is the element, with the exception of any elements whose attribute is in the state, run these substeps: • If candidate has an attribute, add an entry to sourced names with that attribute's value as the string, candidate as the element, and id as the source. • If candidate has a attribute, add an entry to sourced names with that attribute's value as the string, candidate as the element, and name as the source. • For each element candidate whose is the element, run these substeps: • If candidate has an attribute, add an entry to sourced names with that attribute's value as the string, candidate as the element, and id as the source. • If candidate has a attribute, add an entry to sourced names with that attribute's value as the string, candidate as the element, and name as the source. • For each entry past entry in the add an entry to sourced names with the past entry's name as the string, past entry's element as the element, past as the source, and the length of time past entry has been in the as the age. • Sort sourced names by of the element entry of each tuple, sorting entries with the same element by putting entries whose source is id first, then entries whose source is name, and finally entries whose source is past, and sorting entries with the same element and source by their age, oldest first.

• Remove any entries in sourced names that have the empty string as their name. • Remove any entries in sourced names that have the same name as an earlier entry in the map. • Return the list of names from sourced names, maintaining their relative order. The properties exposed in this way must not be enumerable. When a element is indexed for named property retrieval, the user agent must run the following steps: • Let candidates be a object containing all the whose is the element that have either an attribute or a attribute equal to name, with the exception of elements whose attribute is in the state, in.

• If candidates is empty, let candidates be a object containing all the elements that are descendants of the element and that have either an attribute or a attribute equal to name, in. • If candidates is empty, name is the name of one of the entries in the element's: return the object associated with name in that map. • If candidates contains more than one node, return candidates and abort these steps. • Otherwise, candidates contains exactly one node. Add a mapping from name to the node in candidates in the element's, replacing the previous entry with the same name, if any.

• Return the node in candidates. If an element listed in a element's changes, then its entries must be removed from that map. The submit() method, when invoked, must the element from the element itself, with the submitted from method flag set. The reset() method, when invoked, must run the following steps: • If the element is marked as, then abort these steps.

• Mark the element as locked for reset. • the element. • Unmark the element as. If the checkValidity() method is invoked, the user agent must of the element, and return true if the constraint validation return a positive result, and false if it returned a negative result. Some states of the attribute define a value sanitization algorithm. Each element has a, which is exposed by the IDL attribute. Some states define an algorithm to convert a string to a number, an algorithm to convert a number to a string, an algorithm to convert a string to a Date object, and an algorithm to convert a Date object to a string, which are used by,,,,,, and.

Each element has a boolean dirty value flag. The must be initially set to false when the element is created, and must be set to true whenever the user interacts with the control in a way that changes the. (It is also set to true when the value is programmatically changed, as described in the definition of the IDL attribute.) The value content attribute gives the default of the element.

When the content attribute is added, set, or removed, if the control's is false, the user agent must set the of the element to the value of the content attribute, if there is one, or the empty string otherwise, and then run the current, if one is defined. Each element has a, which is exposed by the IDL attribute. Each element has a boolean dirty checkedness flag. When it is true, the element is said to have a dirty checkedness. The must be initially set to false when the element is created, and must be set to true whenever the user interacts with the control in a way that changes the.

The checked content attribute is a that gives the default of the element. When the content attribute is added, if the control does not have, the user agent must set the of the element to true; when the content attribute is removed, if the control does not have, the user agent must set the of the element to false. The for elements is to set the and back to false, set the of the element to the value of the content attribute, if there is one, or the empty string otherwise, set the of the element to true if the element has a content attribute and false if it does not, empty the list of, and then invoke the, if the attribute's current state defines one. Each element can be. Except where otherwise specified, an element is always.

Similarly, except where otherwise specified, the user agent should not allow the user to modify the element's. When an element is, it is not. The attribute can also in some cases (e.g.

For the state, but not the state) stop an element from being. The for elements must propagate the,,, and from the node being cloned to the copy.

When an element is first created, the element's rendering and behavior must be set to the rendering and behavior defined for the attribute's state, and the, if one is defined for the attribute's state, must be invoked. When an element's attribute changes state, the user agent must run the following steps: • If the previous state of the element's attribute put the IDL attribute in the mode, and the element's is not the empty string, and the new state of the element's attribute puts the IDL attribute in either the mode or the mode, then set the element's content attribute to the element's. • Otherwise, if the previous state of the element's attribute put the IDL attribute in any mode other than the mode, and the new state of the element's attribute puts the IDL attribute in the mode, then set the of the element to the value of the content attribute, if there is one, or the empty string otherwise, and then set the control's to false. • Update the element's rendering and behavior to the new state's.

• Invoke the, if one is defined for the attribute's new state. The attribute represents the element's name. The attribute controls how the element's is submitted. The attribute is used to make the control non-interactive and to prevent its value from being submitted. The attribute is used to explicitly associate the element with its.

The attribute controls focus. The attribute controls how the user agent provides autofill behavior. The indeterminate IDL attribute must initially be set to false. On getting, it must return the last value it was set to. On setting, it must be set to the new value. It has no effect except for changing the appearance of controls.

The accept, alt, max, min, multiple, pattern, placeholder, required, size, src, and step IDL attributes must the respective content attributes of the same name. The dirName IDL attribute must the content attribute. The readOnly IDL attribute must the content attribute. The defaultChecked IDL attribute must the content attribute.

The defaultValue IDL attribute must the content attribute. The type IDL attribute must the respective content attribute of the same name,. The maxLength IDL attribute must the content attribute,. The minLength IDL attribute must the content attribute,. The IDL attributes width and height must return the rendered width and height of the image, in CSS pixels, if an image is, and is being rendered to a visual medium; or else the intrinsic width and height of the image, in CSS pixels, if an image is but not being rendered to a visual medium; or else 0, if no image is. When the element's attribute is not in the state, then no image is. On setting, they must act as if they the respective content attributes of the same name.

The,, and IDL attributes, and the, and methods, are part of the. The IDL attribute provides a list of the element's s. The,,,,, and methods and IDL attributes expose the element's text selection.

The,,, and IDL attributes are part of the element's forms API. 4.10.5.1 States of the attribute 4.10.5.1.1 Hidden state ( type=hidden).

If the element is, its should be editable by the user. User agents must not allow users to insert 'LF' (U+000A) or 'CR' (U+000D) characters into the element's. If the element is, the user agent should allow the user to change the writing direction of the element, setting it either to a left-to-right writing direction or a right-to-left writing direction. If the user does so, the user agent must then run the following steps: • Set the element's attribute to ' ' if the user selected a left-to-right writing direction, and ' ' if the user selected a right-to-left writing direction. • to that bubbles named input at the element.

The attribute, if specified, must have a value that contains no 'LF' (U+000A) or 'CR' (U+000D) characters. If the element is, the user agent should allow the user to change the URL represented by its. User agents may allow the user to set the to a string that is not a, but may also or instead automatically escape characters entered by the user so that the is always a (even if that isn't the actual value seen and edited by the user in the interface).

User agents should allow the user to set the to the empty string. User agents must not allow users to insert 'LF' (U+000A) or 'CR' (U+000D) characters into the. The attribute, if specified and not empty, must have a value that is a that is also an.

If a document contained the following markup:.and the user had typed ' www.w3', and the user agent had also found that the user had visited and in the recent past, then the rendering might look like this: The first four URLs in this sample consist of the four URLs in the author-specified list that match the text the user has entered, sorted in some UA-defined manner (maybe by how frequently the user refers to those URLs). Note how the UA is using the knowledge that the values are URLs to allow the user to omit the scheme part and perform intelligent matching on the domain name. The last two URLs (and probably many more, given the scrollbar's indications of more values being available) are the matches from the user agent's session history data.

This data is not made available to the page DOM. In this particular case, the UA has no titles to provide for those values.

4.10.5.1.5 E-mail state ( type=email). If the element is, the user agent should allow the user to change the e-mail address represented by its. User agents may allow the user to set the to a string that is not a. The user agent should act in a manner consistent with expecting the user to provide a single e-mail address. User agents should allow the user to set the to the empty string. User agents must not allow users to insert 'LF' (U+000A) or 'CR' (U+000D) characters into the.

User agents may transform the for display and editing; in particular, user agents should convert punycode in the to IDN in the display and vice versa. Constraint validation: While the user interface is representing input that the user agent cannot convert to punycode, the control is.

The attribute, if specified and not empty, must have a value that is a single. If the element is, the user agent should allow the user to add, remove, and edit the e-mail addresses represented by its. User agents may allow the user to set any individual value in the list of to a string that is not a, but must not allow users to set any individual value to a string containing ',' (U+002C), 'LF' (U+000A), or 'CR' (U+000D) characters. User agents should allow the user to remove all the addresses in the element's. User agents may transform the for display and editing; in particular, user agents should convert punycode in the to IDN in the display and vice versa. Constraint validation: While the user interface describes a situation where an individual value contains a ',' (U+002C) or is representing input that the user agent cannot convert to punycode, the control is. Whenever the user changes the element's, the user agent must run the following steps: • Let latest values be a copy of the element's.

• from each value in latest values. • Let the element's be the result of concatenating all the values in latest values, separating each value from the next by a single ',' (U+002C) character, maintaining the list's order. The attribute, if specified, must have a value that is a.

The is as follows: • the element's, from each resulting token, if any, and let the element's be the (possibly empty) resulting list of (possibly empty) tokens, maintaining the original order. • Let the element's be the result of concatenating the element's, separating each value from the next by a single ',' (U+002C) character, maintaining the list's order. When the attribute is set, the user agent must run the.

Constraint validation: While the of the element is not a, the element is. A valid e-mail address is a string that matches the email production of the following ABNF, the character set for which is Unicode. This ABNF implements the extensions described in RFC 1123. Email = 1*( atext / '.' ) '@' label *( '.' Label ) label = let-dig [ [ ldh-str ] let-dig ]; limited to a length of 63 characters by atext = let-dig = ldh-str = This requirement is a of RFC 5322, which defines a syntax for e-mail addresses that is simultaneously too strict (before the '@' character), too vague (after the '@' character), and too lax (allowing comments, whitespace characters, and quoted strings in manners unfamiliar to most users) to be of practical use here.

If the element is, the user agent should allow the user to change the represented by its, as obtained by from it. User agents must not allow the user to set the to a non-empty string that is not a.

If the user agent provides a user interface for selecting a, then the must be set to a representing the user's selection. User agents should allow the user to set the to the empty string. Constraint validation: While the user interface describes input that the user agent cannot convert to a, the control is. See the for a discussion of the difference between the input format and submission format for date, time, and number form controls, and the regarding localization of form controls. The attribute, if specified and not empty, must have a value that is a. When the element is, the user agent may round the element's to the nearest for which the element would not. The, given a string input, is as follows: If from input results in an error, then return an error; otherwise, return the number of milliseconds elapsed from midnight UTC on the morning of 1970-01-01 (the time represented by the value ' 1970-01-01T00:00:00.0Z') to midnight UTC on the morning of the parsed, ignoring leap seconds.

The, given a number input, is as follows: Return a that represents the that, in UTC, is current input milliseconds after midnight UTC on the morning of 1970-01-01 (the time represented by the value ' 1970-01-01T00:00:00.0Z'). The, given a string input, is as follows: If from input results in an error, then return an error; otherwise, return representing midnight UTC on the morning of the parsed. The, given a Date object input, is as follows: Return a that represents the current at the time represented by input in the UTC time zone. If the element is, the user agent should allow the user to change the represented by its, as obtained by from it. User agents must not allow the user to set the to a non-empty string that is not a. If the user agent provides a user interface for selecting a, then the must be set to a representing the user's selection.

User agents should allow the user to set the to the empty string. Constraint validation: While the user interface describes input that the user agent cannot convert to a, the control is. See the for a discussion of the difference between the input format and submission format for date, time, and number form controls, and the regarding localization of form controls.

The attribute, if specified and not empty, must have a value that is a. When the element is, the user agent may round the element's to the nearest for which the element would not.

The, given a string input, is as follows: If from input results in an error, then return an error; otherwise, return the number of milliseconds elapsed from midnight to the parsed on a day with no time changes. The, given a number input, is as follows: Return a that represents the that is input milliseconds after midnight on a day with no time changes. The, given a string input, is as follows: If from input results in an error, then return an error; otherwise, return representing the parsed in UTC on 1970-01-01. The, given a Date object input, is as follows: Return a that represents the UTC component that is represented by input. If the element is, the user agent should allow the user to change the number represented by its, as obtained from applying the to it. User agents must not allow the user to set the to a non-empty string that is not a.

If the user agent provides a user interface for selecting a number, then the must be set to the. User agents should allow the user to set the to the empty string. Constraint validation: While the user interface describes input that the user agent cannot convert to a, the control is. This specification does not define what user interface user agents are to use; user agent vendors are encouraged to consider what would best serve their users' needs. For example, a user agent in Persian or Arabic markets might support Persian and Arabic numeric input (converting it to the format required for submission as described above).

Similarly, a user agent designed for Romans might display the value in Roman numerals rather than in decimal; or (more realistically) a user agent designed for the French market might display the value with apostrophes between thousands and commas before the decimals, and allow the user to enter a value in that manner, internally converting it to the submission format described above. The attribute, if specified and not empty, must have a value that is a.

Here is an example of using a numeric input control: How much do you want to charge? $ As described above, a user agent might support numeric input in the user's local format, converting it to the format required for submission as described above. This might include handling grouping separators (as in '872,000,000,000') and various decimal separators (such as '3,99' vs '3.99') or using local digits (such as those in Arabic, Devanagari, Persian, and Thai). The type=number state is not appropriate for input that happens to only consist of numbers but isn't strictly speaking a number.

For example, it would be inappropriate for credit card numbers or US postal codes. A simple way of determining whether to use type=number is to consider whether it would make sense for the input control to have a spinbox interface (e.g. With 'up' and 'down' arrows). Getting a credit card number wrong by 1 in the last digit isn't a minor mistake, it's as wrong as getting every digit incorrect. So it would not make sense for the user to select a credit card number using 'up' and 'down' buttons. When a spinbox interface is not appropriate, type=text is probably the right choice (possibly with a attribute).

4.10.5.1.10 Range state ( type=range). In this state, the range and step constraints are enforced even during user input, and there is no way to set the value to the empty string.

If the element is, the user agent should allow the user to change the number represented by its, as obtained from applying the to it. User agents must not allow the user to set the to a string that is not a. If the user agent provides a user interface for selecting a number, then the must be set to a. User agents must not allow the user to set the to the empty string. Constraint validation: While the user interface describes input that the user agent cannot convert to a, the control is. The attribute, if specified, must have a value that is a. When the element is, the user agent must round the element's to the nearest number for which the element would not, and which is greater than or equal to the, and, if the is not less than the, which is less than or equal to the, if there is a number that matches these constraints.

If two numbers match these constraints, then user agents must use the one nearest to positive infinity. For example, the markup results in a range control whose initial value is 60. The, given a string input, is as follows: If applying the to input results in an error, then return an error; otherwise, return the resulting number. The, given a number input, is as follows: Return a that represents input.

In this state, there is always a color picked, and there is no way to set the value to the empty string. If the element is, the user agent should allow the user to change the color represented by its, as obtained from applying the to it. User agents must not allow the user to set the to a string that is not a. If the user agent provides a user interface for selecting a color, then the must be set to the result of using the to the user's selection. User agents must not allow the user to set the to the empty string. Constraint validation: While the user interface describes input that the user agent cannot convert to a, the control is.

The attribute, if specified and not empty, must have a value that is a. When an element's attribute is in the state, the rules in this section apply. The element a two-state control that represents the element's state. If the element's state is true, the control represents a positive selection, and if it is false, a negative selection. If the element's IDL attribute is set to true, then the control's selection should be obscured as if the control was in a third, indeterminate, state.

The control is never a true tri-state control, even if the element's IDL attribute is set to true. The IDL attribute only gives the appearance of a third state. If the element is, then: The consist of setting the element's to its opposite value (i.e.

True if it is false, false if it is true), and of setting the element's IDL attribute to false. The consist of setting the and the element's IDL attribute back to the values they had before the were run. The is to that bubbles named input at the element and then that bubbles named change at the element. If the element is not, it has no.

Constraint validation: If the element is and its is false, then the element is. [ = value ] When set, overrides the rendering of controls so that the current value is not visible. When an element's attribute is in the state, the rules in this section apply. The element a control that, when used in conjunction with other elements, forms a in which only one control can have its state set to true. If the element's state is true, the control represents the selected control in the group, and if it is false, it indicates a control in the group that is not selected. The radio button group that contains an element a also contains all the other elements b that fulfill all of the following conditions: • The element b's attribute is in the state.

• Either a and b have the same, or they both have no. • Both a and b are in the same. • They both have a attribute, their attributes are not empty, and the value of a's attribute is a match for the value of b's attribute. A document must not contain an element whose contains only that element. When any of the following phenomena occur, if the element's state is true after the occurrence, the state of all the other elements in the same must be set to false: • The element's state is set to true (for whatever reason). • The element's attribute is set, changed, or removed. • The element's changes.

If the element is, then: The consist of setting the element's to true. The consist of setting the element's to false. The is to that bubbles named input at the element and then that bubbles named change at the element.. If the element is not, it has no. Constraint validation: If an element in the is, and all of the elements in the have a that is false, then the element is. If none of the radio buttons in a are checked when they are inserted into the document, then they will all be initially unchecked in the interface, until such time as one of them is checked (either by the user or by script). File names must not contain path components, even in the case that a user has selected an entire directory hierarchy or multiple files with the same name from different directories.

Unless the attribute is set, there must be no more than one file in the list of. If the element is, then the element's is to run the following steps: • If the algorithm is not, then abort these steps without doing anything else. • Return, but continue running these steps asynchronously. • Optionally, wait until any prior execution of this algorithm has terminated.• Display a prompt to the user requesting that the user specify some files. If the attribute is not set, there must be no more than one file selected; otherwise, any number may be selected. Files can be from the filesystem or created on the fly, e.g. A picture taken from a camera connected to the user's device.• Wait for the user to have made their selection.

• to first update the element's so that it represents the user's selection, then that bubbles named input at the element, and finally that bubbles named change at the element. If the element is, the user agent should allow the user to change the files on the list in other ways also, e.g. Adding or removing files by drag-and-drop. When the user does so, the user agent must to first update the element's so that it represents the user's new selection, then that bubbles named input at the element, and finally that bubbles named change at the element. If the element is not, it has no and the user agent must not allow the user to change the element's selection.

Constraint validation: If the element is and the list of is empty, then the element is. The accept attribute may be specified to provide user agents with a hint of what file types will be accepted.

If specified, the attribute must consist of a, each of which must be an match for one of the following: The string audio/* Indicates that sound files are accepted. The string video/* Indicates that video files are accepted. The string image/* Indicates that image files are accepted. A Indicates that files of the specified type are accepted. A string whose first character is a '.' (U+002E) character Indicates that files with the specified file extension are accepted.

The tokens must not be matches for any of the other tokens (i.e. Duplicates are not allowed). To obtain the list of tokens from the attribute, the user agent must. User agents may use the value of this attribute to display a more appropriate user interface than a generic file picker. For instance, given the value image/*, a user agent could offer the user the option of using a local camera or selecting a photograph from their photo collection; given the value audio/*, a user agent could offer the user the option of recording a clip using a headset microphone. For example, consider an application that converts Microsoft Word documents to Open Document Format files.

Since Microsoft Word documents are described with a wide variety of MIME types and extensions, the site can list several, as follows: On platforms that only use file extensions to describe file types, the extensions listed here can be used to filter the allowed documents, while the MIME types can be used with the system's type registration table (mapping MIME types to extensions used by the system), if any, to determine any other extensions to allow. Similarly, on a system that does not have file names or extensions but labels documents with MIME types internally, the MIME types can be used to pick the allowed files, while the extensions can be used if the system has an extension registration table that maps known extensions to MIME types used by the system. Extensions tend to be ambiguous (e.g. There are an untold number of formats that use the '.dat' extension, and users can typically quite easily rename their files to have a '.doc' extension even if they are not Microsoft Word documents), and MIME types tend to be unreliable (e.g. Many formats have no formally registered types, and many formats are in practice labeled using a number of different MIME types).

Authors are reminded that, as usual, data received from a client should be treated with caution, as it may not be in an expected format even if the user is not hostile and the user agent fully obeyed the attribute's requirements. When an element's attribute is in the state, the rules in this section apply. The element either an image from which a user can select a coordinate and submit the form, or alternatively a button from which the user can submit the form. The element is a, specifically a. The coordinate is sent to the server by sending two entries for the element, derived from the name of the control but with '.x' and '.y' appended to the name with the x and y components of the coordinate respectively. The image is given by the src attribute.

The attribute must be present, and must contain a referencing a non-interactive, optionally animated, image resource that is neither paged nor scripted. When any of the following events occur, unless the user agent cannot support images, or its support for images has been disabled, or the user agent only fetches elements on demand, or the attribute's value is the empty string, the user agent must the value of the attribute, relative to the element, and if that is successful, must the resulting: • The element's attribute is first set to the state (possibly when the element is first created), and the attribute is present. • The element's attribute is changed back to the state, and the attribute is present, and its value has changed since the last time the attribute was in the state. • The element's attribute is in the state, and the attribute is set or changed. Fetching the image must of the element's document until the that is by the once the resource has been (defined below) has been run.

If the image was successfully obtained, with no network errors, and the image's type is a supported image type, and the image is a valid image of that type, then the image is said to be available. If this is true before the image is completely downloaded, each that is by the while the image is being must update the presentation of the image appropriately. The user agent should apply the to determine the type of the image, with the image's giving the official type. If these rules are not applied, then the type of the image must be the type given by the image's. User agents must not support non-image resources with the element. User agents must not run executable code embedded in the image resource. User agents must only display the first page of a multipage resource.

User agents must not allow the resource to act in an interactive fashion, but should honor any animation in the resource. The that is by the once the resource has been, must, if the download was successful and the image is, to named load at the element; and otherwise, if the fetching process fails without a response from the remote server, or completes but the image is not a valid or supported image, to named error on the element. The alt attribute provides the textual label for the button for users and user agents who cannot use the image. The attribute must be present, and must contain a non-empty string giving the label that would be appropriate for an equivalent button if the image was unavailable. The element supports.

If the attribute is set, and the image is and the user agent is configured to display that image, then: The element a control for selecting a from the image specified by the attribute; if the element is, the user agent should allow the user to select this, and the element's is as follows: if the element has a, and the element's is, take the user's selected, and the element's from the element. If the user activates the control without explicitly selecting a coordinate, then the coordinate (0,0) must be assumed. Otherwise, the element a submit button whose label is given by the value of the attribute; if the element is, then the element's is as follows: if the element has a, and the element's is, set the to (0,0), and the element's from the element. In either case, if the element is but has no or the element's is not, then its must be to do nothing.

If the element is not, it has no. The selected coordinate must consist of an x-component and a y-component. The coordinates represent the position relative to the edge of the image, with the coordinate space having the positive x direction to the right, and the positive y direction downwards. The x-component must be a representing a number x in the range −( border left+ padding left) ≤ x ≤ width+ border right+ padding right, where width is the rendered width of the image, border left is the width of the border on the left of the image, padding left is the width of the padding on the left of the image, border right is the width of the border on the right of the image, and padding right is the width of the padding on the right of the image, with all dimensions given in CSS pixels. The y-component must be a representing a number y in the range −( border top+ padding top) ≤ y ≤ height+ border bottom+ padding bottom, where height is the rendered height of the image, border top is the width of the border above the image, padding top is the width of the padding above the image, border bottom is the width of the border below the image, and padding bottom is the width of the padding below the image, with all dimensions given in CSS pixels. Where a border or padding is missing, its width is zero CSS pixels.

The,,,, and attributes are. [ = value ] image. [ = value ] These attributes return the actual rendered dimensions of the image, or zero if the dimensions are not known. They can be set, to change the corresponding content attributes. The following common element content attributes and IDL attributes to the element:,,,,,,,, and content attributes; IDL attribute. The IDL attribute is in mode. The following content attributes must not be specified and to the element:,,,,,,,,,,,,,,, and.

The element's attribute must be omitted. The following IDL attributes and methods to the element:,,,,,,, and IDL attributes;,,,, and methods. The and events. Many aspects of this state's behavior are similar to the behavior of the element. Readers are encouraged to read that section, where many of the same requirements are described in more detail. Take the following form: If the user clicked on the image at coordinate (127,40) then the URL used to submit the form would be ' process.cgi?where.x=127&where.y=40'.

(In this example, it's assumed that for users who don't see the map, and who instead just see a button labeled 'Show location list', clicking the button will cause the server to show a list of locations to pick from instead of the map.) 4.10.5.1.17 Reset Button state ( type=reset). 4.10.5.2 Implemention notes regarding localization of form controls This section is non-normative. The formats shown to the user in date, time, and number controls is independent of the format used for form submission. Browsers are encouraged to use user interfaces that present dates, times, and numbers according to the conventions of either the locale implied by the element's or the user's preferred locale. Using the page's locale will ensure consistency with page-provided data.

For example, it would be confusing to users if an American English page claimed that a Cirque De Soleil show was going to be showing on 02/03, but their browser, configured to use the British English locale, only showed the date 03/02 in the ticket purchase date picker. Using the page's locale would at least ensure that the date was presented in the same format everywhere. (There's still a risk that the user would end up arriving a month late, of course, but there's only so much that can be done about such cultural differences.) 4.10.5.3 Common element attributes. These attributes only to an element if its attribute is in a state whose definition declares that the attribute.

When an attribute to an element, user agents must the attribute, regardless of the requirements and definitions below. 4.10.5.3.1 The and attributes The maxlength attribute, when it, is a controlled by the element's. The minlength attribute, when it, is a controlled by the element's.

If the element has a, then the of the value of the element's attribute must be equal to or less than the element's. In the following example, the existing product identifiers cannot be modified, but they are still displayed as part of the form, for consistency with the row representing a new product (where the identifier is not yet filled in).

Product ID Product name Price Action $ Delete $ Delete $ Delete Add Save 4.10.5.3.4 The attribute The required attribute is a. When specified, the element is required. The following form has two required fields, one for an e-mail address and one for a password. It also has a third field that is only considered valid if the user types the same password in the password field and this third field. Create new account E-mail address: Password: Confirm password:

For radio buttons, the attribute is satisfied if any of the radio buttons in the is selected. Thus, in the following example, any of the radio buttons can be checked, not just the one marked as required: Did the movie pass the Bechdel test?

No, there are not even two female characters in the movie. No, the female characters never talk to each other. No, when female characters talk to each other it's always about a male character. I don't know. To avoid confusion as to whether a is required or not, authors are encouraged to specify the attribute on all the radio buttons in a group. Indeed, in general, authors are encouraged to avoid having radio button groups that do not have any initially checked controls in the first place, as this is a state that the user cannot return to, and is therefore generally considered a poor user interface.

4.10.5.3.5 The attribute The multiple attribute is a that indicates whether the user is to be allowed to specify more than one value. The following extract shows how an e-mail client's 'Cc' field could accept multiple e-mail addresses. Cc: If the user had, amongst many friends in his user contacts database, two friends 'Arthur Dent' (with address 'art@example.net') and 'Adam Josh' (with address 'adamjosh@example.net'), then, after the user has typed 'a', the user agent might suggest these two e-mail addresses to the user. The page could also link in the user's contacts database from the site: Cc:. Suppose the user had entered 'bob@example.net' into this text field, and then started typing a second e-mail address starting with 'a'. The user agent might show both the two friends mentioned earlier, as well as the 'astrophy' and 'astronomy' values given in the element.

If an element has a attribute specified, and the attribute's value, when compiled as a JavaScript regular expression with the global, ignoreCase, and multiline flags disabled (see ECMA262 Edition 5, sections 15.10.7.2 through 15.10.7.4), compiles successfully, then the resulting regular expression is the element's compiled pattern regular expression. If the element has no such attribute, or if the value doesn't compile successfully, then the element has no. Constraint validation: If the element's is not the empty string, and either the element's attribute is not specified or it to the element given its attribute's current state, and the element has a but that regular expression does not match the entirety of the element's, then the element is. Constraint validation: If the element's is not the empty string, and the element's attribute is specified and to the element, and the element has a but that regular expression does not match the entirety of each of the element's, then the element is. The, when matched against a string, must have its start anchored to the start of the string and its end anchored to the end of the string. This implies that the regular expression language used for this attribute is the same as that used in JavaScript, except that the attribute is matched against the entire value, not just any subset (somewhat as if it implied a ^(?: at the start of the pattern and a )$ at the end).

When an element has a attribute specified, authors should provide a description of the pattern in text near the control. Authors may also include a attribute to give a description of the pattern. User agents may use the contents of this attribute, if it is present, when informing the user that the pattern is not matched, or at any other suitable time, such as in a tooltip or read out by assistive technology when the control gains focus.

Relying on the attribute alone is currently discouraged as many user agents do not expose the attribute in an accessible manner as required by this specification (e.g. Requiring a pointing device such as a mouse to cause a tooltip to appear, which excludes keyboard-only users and touch-only users, such as anyone with a modern phone or tablet). Their syntax is defined by the section that defines the attribute's current state. If the element has a attribute, and the result of applying the to the value of the attribute is a number, then that number is the element's minimum; otherwise, if the attribute's current state defines a default minimum, then that is the; otherwise, the element has no. The attribute also defines the.

If the element has a attribute, and the result of applying the to the value of the attribute is a number, then that number is the element's maximum; otherwise, if the attribute's current state defines a default maximum, then that is the; otherwise, the element has no. If the element does not, the attribute's value (the ) must not be less than the attribute's value (its ). Constraint validation: When the element has a and does not, and the result of applying the to the string given by the element's is a number, and the number obtained from that algorithm is less than the, the element is. Constraint validation: When the element has a and does not, and the result of applying the to the string given by the element's is a number, and the number obtained from that algorithm is more than the, the element is.

Constraint validation: When an element, and the result of applying the to the string given by the element's is a number, and the number obtained from that algorithm is more than the and less than the, the element is simultaneously and. The following time control limits input to those minutes that occur between 9pm and 6am, defaulting to midnight: 4.10.5.3.8 The attribute The step attribute indicates the granularity that is expected (and required) of the, by limiting the allowed values. The section that defines the attribute's current state also defines the default step, the step scale factor, and in some cases the default step base, which are used in processing the attribute as described below. The attribute, if specified, must either have a value that is a that to a number that is greater than zero, or must have a value that is an match for the string ' any'. The attribute provides the allowed value step for the element, as follows: • If the attribute is absent, then the is the multiplied by the. • Otherwise, if the attribute's value is an match for the string ' any', then there is no.

• Otherwise, if the, when they are applied to the attribute's value, return an error, zero, or a number less than zero, then the is the multiplied by the. • Otherwise, the is the number returned by the when they are applied to the attribute's value, multiplied by the. The step base is the value returned by the following algorithm: • If the element has a content attribute, and the result of applying the to the value of the content attribute is not an error, then return that result and abort these steps. • If the element has a content attribute, and the result of applying the to the value of the content attribute is not an error, then return that result and abort these steps. • If a is defined for this element given its attribute's state, then return it and abort these steps.• Return zero.

Constraint validation: When the element has an, and the result of applying the to the string given by the element's is a number, and that number subtracted from the is not an integral multiple of the, the element is. The suggestions source element is the first element in the document in to have an equal to the value of the attribute, if that element is a element. If there is no attribute, or if there is no element with that, or if the first element with that is not a element, then there is no. If there is a, then, when the user agent is allowing the user to edit the element's, the user agent should offer the suggestions represented by the to the user in a manner suitable for the type of control used. The user agent may use the suggestion's to identify the suggestion if appropriate.

How user selections of suggestions are handled depends on whether the element is a control accepting a single value only, or whether it accepts multiple values: If the element does not have a attribute specified or if the attribute does not apply When the user selects a suggestion, the element's must be set to the selected suggestion's, as if the user had written that value himself. If the element does have a attribute specified, and the attribute does When the user selects a suggestion, the user agent must either add a new entry to the element's, whose value is the selected suggestion's, or change an existing entry in the element's to have the value given by the selected suggestion's, as if the user had himself added an entry with that value, or edited an existing entry to be that value. Which behavior is to be applied depends on the user interface in a user-agent-defined manner. If the attribute, there is no.

This example demonstrates how to design a form that uses the autocompletion list feature while still degrading usefully in legacy user agents. If the autocompletion list is merely an aid, and is not important to the content, then simply using a element with children elements is enough. To prevent the values from being rendered in legacy user agents, they need to be placed inside the attribute instead of inline. Enter a breed: However, if the values need to be shown in legacy UAs, then fallback content can be placed inside the element, as follows: Enter a breed: or select one from the list: (none selected) Abyssinian Alpaca The fallback content will only be shown in UAs that don't support. The options, on the other hand, will be detected by all UAs, even though they are not children of the element. Note that if an element used in a is, it will be selected by default by legacy UAs (because it affects the ), but it will not have any effect on the element in UAs that support.

4.10.5.3.10 The attribute The placeholder attribute represents a short hint (a word or short phrase) intended to aid the user with data entry when the control has no value. A hint could be a sample value or a brief description of the expected format.

The attribute, if specified, must have a value that contains no 'LF' (U+000A) or 'CR' (U+000D) characters. The attribute should not be used as a replacement for a. For a longer hint or other advisory text, place the text next to the control. Use of the attribute as a replacement for a can reduce the accessibility and usability of the control for a range of users including older users and users with cognitive, mobility, fine motor skill or vision impairments.

While the hint given by the control's is shown at all times, the short hint given in the attribute is only shown before the user enters a value. Furthermore, text may be mistaken for a pre-filled value, and as commonly implemented the default color of the placeholder text provides insufficient contrast and the lack of a separate visible reduces the size of the hit region available for setting focus on the control. In situations where the control's content has one directionality but the placeholder needs to have a different directionality, Unicode's bidirectional-algorithm formatting characters can be used in the attribute value: For slightly more clarity, here's the same example using numeric character references instead of inline Arabic: 4.10.5.4 Common element APIs input. [ = value ] Returns the current of the form control.

Can be set, to change the value. Throws an exception if it is set to any value other than the empty string when the control is a file upload control. [ = value ] Returns the current of the form control. Can be set, to change the. Returns a object listing the of the form control. Returns null if the control isn't a file control. [ = value ] Returns a Date object representing the form control's, if applicable; otherwise, returns null.

Can be set, to change the value. Throws an exception if the control isn't date- or time-based. [ = value ] Returns a number representing the form control's, if applicable; otherwise, returns NaN. Can be set, to change the value.

Setting this to NaN will set the underlying value to the empty string. Throws an exception if the control is neither date- or time-based nor numeric. ( [ n ] ) input. ( [ n ] ) Changes the form control's by the value given in the attribute, multiplied by n. The default value for n is 1. Throws exception if the control is neither date- or time-based nor numeric, or if the attribute's value is ' any'.

Returns the element indicated by the attribute. The value IDL attribute allows scripts to manipulate the of an element. The attribute is in one of the following modes, which define its behavior: value On getting, it must return the current of the element. On setting, it must set the element's to the new value, set the element's to true, invoke the, if the element's attribute's current state defines one, and then, if the element has a text entry cursor position, should move the text entry cursor position to the end of the text field, unselecting any selected text and resetting the selection direction to none. Default On getting, if the element has a attribute, it must return that attribute's value; otherwise, it must return the empty string. On setting, it must set the element's attribute to the new value. Default/on On getting, if the element has a attribute, it must return that attribute's value; otherwise, it must return the string ' on'.

On setting, it must set the element's attribute to the new value. Filename On getting, it must return the string ' C: fakepath ' followed by the name of the first file in the list of, if any, or the empty string if the list is empty. On setting, if the new value is the empty string, it must empty the list of; otherwise, it must throw an exception. This 'fakepath' requirement is a sad accident of history. See for more information.

The checked IDL attribute allows scripts to manipulate the of an element. On getting, it must return the current of the element; and on setting, it must set the element's to the new value and set the element's to true. The files IDL attribute allows scripts to access the element's. On getting, if the IDL attribute, it must return a object that represents the current.

The same object must be returned until the list of changes. If the IDL attribute, then it must instead return null. The valueAsDate IDL attribute represents the of the element, interpreted as a date. On getting, if the attribute, as defined for the element's attribute's current state, then return null. Otherwise, run the defined for that state; if the algorithm returned a Date object, then return it, otherwise, return null. On setting, if the attribute, as defined for the element's attribute's current state, then throw an exception; otherwise, if the new value is null or a Date object representing the NaN time value, then set the of the element to the empty string; otherwise, run the, as defined for that state, on the new value, and set the of the element to the resulting string. The valueAsNumber IDL attribute represents the of the element, interpreted as a number.

On getting, if the attribute, as defined for the element's attribute's current state, then return a Not-a-Number (NaN) value. Otherwise, if the attribute, run the defined for that state; if the algorithm returned a Date object, then return the time value of the object (the number of milliseconds from midnight UTC the morning of 1970-01-01 to the time represented by the Date object), otherwise, return a Not-a-Number (NaN) value.

Otherwise, run the defined for that state; if the algorithm returned a number, then return it, otherwise, return a Not-a-Number (NaN) value. On setting, if the new value is infinite, then throw a TypeError exception. Otherwise, if the attribute, as defined for the element's attribute's current state, then throw an exception.

Otherwise, if the new value is a Not-a-Number (NaN) value, then set the of the element to the empty string. Otherwise, if the attribute, run the defined for that state, passing it a Date object whose time value is the new value, and set the of the element to the resulting string. Otherwise, run the, as defined for that state, on the new value, and set the of the element to the resulting string. The stepDown( n) and stepUp( n) methods, when invoked, must run the following algorithm: • If the and methods, as defined for the element's attribute's current state, then throw an exception, and abort these steps. • If the element has no, then throw an exception, and abort these steps. • If the element has a and a and the is greater than the, then abort these steps.• If the element has a and a and there is no value greater than or equal to the element's and less than or equal to the element's that, when subtracted from the, is an integral multiple of the, then abort these steps.• If applying the to the string given by the element's does not result in an error, then let value be the result of that algorithm. Otherwise, let value be zero.

• If value subtracted from the is not an integral multiple of the, then set value to the nearest value that, when subtracted from the, is an integral multiple of the, and that is less than value if the method invoked was the and more than value otherwise. Otherwise ( value subtracted from the is an integral multiple of the ), run the following substeps: • Let n be the argument. • Let delta be the multiplied by n.

• If the method invoked was the method, negate delta. • Let value be the result of adding delta to value. • If the element has a, and value is less than that, then set value to the smallest value that, when subtracted from the, is an integral multiple of the, and that is more than or equal to minimum.

• If the element has a, and value is greater than that, then set value to the largest value that, when subtracted from the, is an integral multiple of the, and that is less than or equal to maximum. • Let value as string be the result of running the, as defined for the element's attribute's current state, on value. • Set the of the element to value as string. The list IDL attribute must return the current, if any, or null otherwise. Constraint validation: If the attribute is in the state, or the state, the element is. When a element is not, its element is to run the steps defined in the following list for the current state of the element's attribute: Submit Button If the element has a and the element's is, the element must the from the element. Reset Button If the element has a and the element's is, the element must the.

Button Do nothing. The attribute is used to explicitly associate the element with its. The attribute represents the element's name. The attribute is used to make the control non-interactive and to prevent its value from being submitted. The attribute controls focus.

The,,,, and attributes are. The attribute can be used to make submit buttons that do not trigger the constraint validation. The,,,, and must not be specified if the element's attribute is not in the state.

The value attribute gives the element's value for the purposes of form submission. The element's is the value of the element's attribute, if there is one, or the empty string otherwise. A button (and its value) is only included in the form submission if the button itself was used to initiate the form submission.

The display size of a element is the result of applying the to the value of element's attribute, if it has one and parsing it is successful. If applying those rules to the attribute's value is not successful, or if the attribute is absent, then the element's is 4 if the element's content attribute is present, and 1 otherwise. The list of options for a element consists of all the element children of the element, and all the element children of all the element children of the element, in. The required attribute is a. When specified, the user will be required to select a value before submitting the form. If a element has a attribute specified, does not have a attribute specified, and has a of 1; and if the of the first element in the element's (if any) is the empty string, and that element's parent node is the element (and not an element), then that is the element's placeholder label option. If a element has a attribute specified, does not have a attribute specified, and has a of 1, then the element must have a.

If the attribute is absent, and the element is not, then the user agent should allow the user to pick an element in its that is itself not. Upon this element being picked (either through a click, or through unfocusing the element after changing its value, or through any other mechanism), and before the relevant user interaction event is queued (e.g. Before the event), the user agent must set the of the picked element to true, set its to true, and then.

If the attribute is absent, whenever an element in the element's has its set to true, and whenever an element with its set to true is added to the element's, the user agent must set the of all the other elements in its to false. If the attribute is absent and the element's is greater than 1, then the user agent should also allow the user to request that the whose is true, if any, be unselected. Upon this request being conveyed to the user agent, and before the relevant user interaction event is queued (e.g.

Before the event), the user agent must set the of that element to false, set its to true, and then. If or causing the to gain or lose one or more elements, or if an element in the asks for a reset, then, if the element's attribute is absent, the element's is 1, and no elements in the element's have their set to true, the user agent must set the of the first element in the in that is not, if any, to true. If the attribute is present, and the element is not, then the user agent should allow the user to toggle the of the elements in its that are themselves not. Upon such an element being (either through a click, or any other mechanism), and before the relevant user interaction event is queued (e.g. Before a related event), the of the element must be changed (from true to false or false to true), the of the element must be set to true, and the user agent must. When the user agent is to send select update notifications, to first that bubbles named input at the element, and then that bubbles named change at the element, using the as the task source.

The for elements is to go through all the elements in the element's, set their to true if the element has a attribute, and false otherwise, set their to false, and then have the elements. The attribute is used to explicitly associate the element with its.

The attribute represents the element's name. The attribute is used to make the control non-interactive and to prevent its value from being submitted.

The attribute controls focus. A element that is not is. Returns ' select-multiple' if the element has a attribute, and ' select-one' otherwise. Returns an of the. [ = value ] Returns the number of elements in the. When set to a smaller number, truncates the number of elements in the.

When set to a greater number, adds new blank elements to the. Element = select. ( index) select[ index] Returns the item with index index from the. The items are sorted in. Element = select. ( name) Returns the first item with or name from the. Returns null if no element with that could be found.

( element [, before ]) Inserts element before the node given by before. The before argument can be a number, in which case element is inserted before the item with that number, or an element from the, in which case element is inserted before that element. If before is omitted, null, or a number out of range, then element will be added at the end of the list.

This method will throw a exception if element is an ancestor of the element into which it is to be inserted. Returns an of the that are selected. [ = value ] Returns the index of the first selected item, if any, or −1 if there is no selected item.

Can be set, to change the selection. [ = value ] Returns the of the first selected item, if any, or the empty string if there is no selected item. Can be set, to change the selection. The type IDL attribute, on getting, must return the string ' select-one' if the attribute is absent, and the string ' select-multiple' if the attribute is present. The options IDL attribute must return an rooted at the node, whose filter matches the elements in the. The collection is also mirrored on the object.

The at any instant are the indices supported by the object returned by the attribute at that instant. The length IDL attribute must return the number of nodes by the collection. On setting, it must act like the attribute of the same name on the collection.

The item( index) method must return the value returned by on the collection, when invoked with the same argument. The namedItem( name) method must return the value returned by on the collection, when invoked with the same argument.

When the user agent is to set the value of a new indexed property for a given property index index to a new value value, it must instead with the given property index index to the new value value on the collection. Similarly, the add() method must act like its namesake method on that same collection. The remove() method must act like its namesake method on that same collection when it has arguments, and like its namesake method on the interface implemented by the ancestor interface when it has no arguments. The selectedOptions IDL attribute must return an rooted at the node, whose filter matches the elements in the that have their set to true.

The selectedIndex IDL attribute, on getting, must return the of the first element in the in that has its set to true, if any. If there isn't one, then it must return −1. On setting, the attribute must set the of all the elements in the to false, and then the element in the whose is the given new value, if any, must have its set to true and its set to true. This can result in no element having a set to true even in the case of the element having no attribute and a of 1. The value IDL attribute, on getting, must return the of the first element in the in that has its set to true, if any. If there isn't one, then it must return the empty string.

On setting, the attribute must set the of all the elements in the to false, and then the first element in the, in, whose is equal to the given new value, if any, must have its set to true and its set to true. This can result in no element having a set to true even in the case of the element having no attribute and a of 1. The multiple, required, and size IDL attributes must the respective content attributes of the same name. The IDL attribute has a default value of zero.

For historical reasons, the default value of the IDL attribute does not return the actual size used, which, in the absence of the content attribute, is either 1 or 4 depending on the presence of the attribute. The,, and IDL attributes, and the, and methods, are part of the. The IDL attribute provides a list of the element's s. The,,, and IDL attributes are part of the element's forms API.

The following example shows how a element can be used to offer the user with a set of options from which the user can select a single option. The default option is preselected. Select unit type: Miner Puffer Snipey Max Firebot When there is no default option, a placeholder can be used instead: Select unit type Miner Puffer Snipey Max Firebot. Sex: or select from the list: Female Male The element is hooked up to an element using the attribute on the element. Each element that is a descendant of the element, that is not, and whose is a string that isn't the empty string, represents a suggestion.

Each suggestion has a and a. Returns an of the options elements of the element. An element that is must prevent any events that are on the from being dispatched on the element. The label attribute provides a label for element. The label of an element is the value of the content attribute, if there is one, or, if there is not, the value of the element's IDL attribute. The content attribute, if specified, must not be empty. The value attribute provides a value for element.

The value of an element is the value of the content attribute, if there is one, or, if there is not, the value of the element's IDL attribute. The selected attribute is a.

It represents the default of the element. The dirtiness of an element is a boolean state, initially false. It controls whether adding or removing the content attribute has any effect. The selectedness of an element is a boolean state, initially false. Except where otherwise specified, when the element is created, its must be set to true if the element has a attribute.

Whenever an element's attribute is added, if its is false, its must be set to true. Whenever an element's attribute is removed, if its is false, its must be set to false. The constructor, when called with three or fewer arguments, overrides the initial state of the state to always be false even if the third argument is true (implying that a attribute is to be set). The fourth argument can be used to explicitly set the initial state when using the constructor.

A element whose attribute is not specified must not have more than one descendant element with its attribute set. An element's index is the number of elements that are in the same but that come before it in. If the element is not in a, then the element's is zero. Returns true if the element is selected, and false otherwise. Can be set, to override the current state of the element.

Returns the index of the element in its element's list. Returns the element's element, if any, or null otherwise.

Same as, except that spaces are collapsed and elements are skipped. Option = new ( [ text [, value [, defaultSelected [, selected ] ] ] ] ) Returns a new element. The text argument sets the contents of the element.

The value argument sets the attribute. The defaultSelected argument sets the attribute. The selected argument sets whether or not the element is selected. If it is omitted, even if the defaultSelected argument is true, the element is not selected. Constraint validation: If the attribute is specified on a element, the element is. A element is if it is neither nor has a attribute specified.

When a is, its should be editable by the user: the user agent should allow the user to edit, insert, and remove text, and to insert and remove line breaks in the form of 'LF' (U+000A) characters. Any time the user causes the element's to change, the user agent must to that bubbles named input at the element. User agents may wait for a suitable break in the user's interaction before queuing the task; for example, a user agent could wait for the user to have not hit a key for 100ms, so as to only fire the event when the user pauses, instead of continuously for each keystroke. A element has a dirty value flag, which must be initially set to false, and must be set to true whenever the user interacts with the control in a way that changes the. When the element's IDL attribute changes value, if the element's is false, then the element's must be set to the value of the element's IDL attribute.

The for elements is to set the element's to the value of the element's IDL attribute. If the element is, the user agent should allow the user to change the writing direction of the element, setting it either to a left-to-right writing direction or a right-to-left writing direction. If the user does so, the user agent must then run the following steps: • Set the element's attribute to ' ' if the user selected a left-to-right writing direction, and ' ' if the user selected a right-to-left writing direction. • to that bubbles named input at the element. The cols attribute specifies the expected maximum number of characters per line. If the attribute is specified, its value must be a greater than zero. If applying the to the attribute's value results in a number greater than zero, then the element's character width is that value; otherwise, it is 20.

The user agent may use the element's as a hint to the user as to how many characters the server prefers per line (e.g. For visual user agents by making the width of the control be that many characters). In visual renderings, the user agent should wrap the user's input in the rendering so that each line is no wider than this number of characters. The rows attribute specifies the number of lines to show. If the attribute is specified, its value must be a greater than zero. If applying the to the attribute's value results in a number greater than zero, then the element's character height is that value; otherwise, it is 2. Visual user agents should set the height of the control to the number of lines given.

The wrap attribute is an with two keywords and states: the soft keyword which maps to the state, and the hard keyword which maps to the state. The missing value default is the state. The Soft state indicates that the text in the is not to be wrapped when it is submitted (though it can still be wrapped in the rendering).

The Hard state indicates that the text in the is to have newlines added by the user agent so that the text is wrapped when it is submitted. If the element's attribute is in the state, the attribute must be specified. For historical reasons, the element's value is normalised in three different ways for three different purposes. The is the value as it was originally set. It is not normalized.

The is the value used in the IDL attribute. It is normalized so that line breaks use 'LF' (U+000A) characters. Finally, there is the form submission.

It is normalized so that line breaks use U+000D CARRIAGE RETURN 'CRLF' (U+000A) character pairs, and in addition, if necessary given the element's attribute, additional line breaks are inserted to wrap the text at the given width. The element's API value is defined to be the element's with the following transformation applied: • Replace every U+000D CARRIAGE RETURN 'CRLF' (U+000A) character pair from the with a single 'LF' (U+000A) character. • Replace every remaining U+000D CARRIAGE RETURN character from the with a single 'LF' (U+000A) character.

The element's is defined to be the element's with the following transformation applied: • Replace every occurrence of a 'CR' (U+000D) character not followed by a 'LF' (U+000A) character, and every occurrence of a 'LF' (U+000A) character not preceded by a 'CR' (U+000D) character, by a two-character string consisting of a U+000D CARRIAGE RETURN 'CRLF' (U+000A) character pair. • If the element's attribute is in the state, insert U+000D CARRIAGE RETURN 'CRLF' (U+000A) character pairs into the string using a UA-defined algorithm so that each line has no more than characters. For the purposes of this requirement, lines are delimited by the start of the string, the end of the string, and U+000D CARRIAGE RETURN 'CRLF' (U+000A) character pairs. The maxlength attribute is a controlled by the element's.

If the element has a, then the element's children must be such that the of the value of the element's IDL attribute is equal to or less than the element's. The minlength attribute is a controlled by the element's. The required attribute is a. When specified, the user will be required to enter a value before submitting the form.

Constraint validation: If the element has its attribute specified, and the element is, and the element's is the empty string, then the element is. The placeholder attribute represents a short hint (a word or short phrase) intended to aid the user with data entry when the control has no value. A hint could be a sample value or a brief description of the expected format. The attribute should not be used as a replacement for a.

For a longer hint or other advisory text, place the text next to the control. Use of the attribute as a replacement for a can reduce the accessibility and usability of the control for a range of users including older users and users with cognitive, mobility, fine motor skill or vision impairments. While the hint given by the control's is shown at all times, the short hint given in the attribute is only shown before the user enters a value. Furthermore, text may be mistaken for a pre-filled value, and as commonly implemented the default color of the placeholder text provides insufficient contrast and the lack of a separate visible reduces the size of the hit region available for setting focus on the control. User agents should present this hint to the user when the element's is the empty string and the control is not focused (e.g. By displaying it inside a blank unfocused control).

All U+000D CARRIAGE RETURN U+000A LINE FEED character pairs (CRLF) in the hint, as well as all other 'CR' (U+000D) and 'LF' (U+000A) characters in the hint, must be treated as line breaks when rendering the hint. The attribute represents the element's name. The attribute controls how the element's is submitted. The attribute is used to make the control non-interactive and to prevent its value from being submitted. The attribute is used to explicitly associate the element with its.

The attribute controls focus. The attribute controls how the user agent provides autofill behavior. Type Returns the string ' textarea'.

Value Returns the current value of the element. Can be set, to change the value. The cols, placeholder, required, rows, and wrap attributes must the respective content attributes of the same name. The and attributes are. The attribute's default value is 20. The attribute's default value is 2. The dirName IDL attribute must the content attribute.

The maxLength IDL attribute must the content attribute,. The minLength IDL attribute must the content attribute,. The readOnly IDL attribute must the content attribute. The type IDL attribute must return the value ' textarea'. The defaultValue IDL attribute must act like the element's IDL attribute. The value attribute must, on getting, return the element's; on setting, it must set the element's to the new value, set the element's to true, and should then move the text entry cursor position to the end of the text field, unselecting any selected text and resetting the selection direction to none.

The textLength IDL attribute must return the of the element's. The,, and IDL attributes, and the, and methods, are part of the. The IDL attribute provides a list of the element's s. The,,,,, and methods and IDL attributes expose the element's text selection. The,,, and IDL attributes are part of the element's forms API. The challenge IDL attribute must the content attribute of the same name. The keytype IDL attribute must the content attribute of the same name,.

The type IDL attribute must return the value ' keygen'. The,, and IDL attributes, and the, and methods, are part of the. The IDL attribute provides a list of the element's s. The,,, and IDL attributes are part of the element's forms API. This specification does not specify how the private key generated is to be used. It is expected that after receiving the (SPKAC) structure, the server will generate a client certificate and offer it back to the user for download; this certificate, once downloaded and stored in the key store along with the private key, can then be used to authenticate to services that use TLS and certificate authentication.

The element has a value mode flag which is either value or default. Initially, the must be set to default. The element also has a default value.

Initially, the must be the empty string. When the is in mode default, the contents of the element represent both the value of the element and its. When the is in mode value, the contents of the element represent the value of the element only, and the is only accessible using the IDL attribute. Whenever the element's descendants are changed in any way, if the is in mode default, the element's must be set to the value of the element's IDL attribute. The for elements is to set the element's to default and then to set the element's IDL attribute to the value of the element's (thus replacing the element's child nodes).

[ = value ] Returns the element's current value. Can be set, to change the value. [ = value ] Returns the element's current default value. Can be set, to change the default value. Returns the string ' output'.

The value IDL attribute must act like the element's IDL attribute, except that on setting, in addition, before the child nodes are changed, the element's must be set to value. The defaultValue IDL attribute, on getting, must return the element's. Mplab Xc8 C Compiler Keygen.

On setting, the attribute must set the element's, and, if the element's is in the mode default, set the element's IDL attribute as well. The type attribute must return the string ' output'. The htmlFor IDL attribute must the content attribute. The,, and IDL attributes, and the, and methods, are part of the. The IDL attribute provides a list of the element's s. The and IDL attributes are part of the element's forms API. User agent requirements: If the attribute is omitted, then the progress bar is an indeterminate progress bar.

Otherwise, it is a determinate progress bar. If the progress bar is a determinate progress bar and the element has a attribute, the user agent must parse the attribute's value according to the.

If this does not result in an error, and if the parsed value is greater than zero, then the maximum value of the progress bar is that value. Otherwise, if the element has no attribute, or if it has one but parsing it resulted in an error, or if the parsed value was less than or equal to zero, then the of the progress bar is 1.0. If the progress bar is a determinate progress bar, user agents must parse the attribute's value according to the. If this does not result in an error, and if the parsed value is less than the and greater than zero, then the current value of the progress bar is that parsed value. Otherwise, if the parsed value was greater than or equal to the, then the of the progress bar is the of the progress bar. Otherwise, if parsing the attribute's value resulted in an error, or a number less than or equal to zero, then the of the progress bar is zero. UA requirements for showing the progress bar: When representing a element to the user, the UA should indicate whether it is a determinate or indeterminate progress bar, and in the former case, should indicate the relative position of the relative to the.

For a determinate progress bar (one with known current and maximum values), returns the result of dividing the current value by the maximum value. For an indeterminate progress bar, returns −1. The following examples show three gauges that would all be three-quarters full: Storage space usage: 6 blocks used (out of 8 total) Voter turnout: Tickets sold: The following example is incorrect use of the element, because it doesn't give a range (and since the default maximum is 1, both of the gauges would end up looking maxed out): The grapefruit pie had a radius of 12cm and a height of 2cm. -->Instead, one would either not include the meter element, or use the meter element with a defined range to give the dimensions in context compared to other pies: The grapefruit pie had a radius of 12cm and a height of 2cm. Radius: 12cm Height: 2cm There is no explicit way to specify units in the element, but the units may be specified in the attribute in free-form text. User agent requirements: User agents must parse the,,,,, and attributes using the. User agents must then use all these numbers to obtain values for six points on the gauge, as follows.

(The order in which these are evaluated is important, as some of the values refer to earlier ones.) The minimum value If the attribute is specified and a value could be parsed out of it, then the minimum value is that value. Otherwise, the minimum value is zero. The maximum value If the attribute is specified and a value could be parsed out of it, then the candidate maximum value is that value.

Otherwise, the candidate maximum value is 1.0. If the candidate maximum value is greater than or equal to the minimum value, then the maximum value is the candidate maximum value. Otherwise, the maximum value is the same as the minimum value. The actual value If the attribute is specified and a value could be parsed out of it, then that value is the candidate actual value. Otherwise, the candidate actual value is zero. If the candidate actual value is less than the minimum value, then the actual value is the minimum value.

Otherwise, if the candidate actual value is greater than the maximum value, then the actual value is the maximum value. Otherwise, the actual value is the candidate actual value.

The low boundary If the attribute is specified and a value could be parsed out of it, then the candidate low boundary is that value. Otherwise, the candidate low boundary is the same as the minimum value. If the candidate low boundary is less than the minimum value, then the low boundary is the minimum value. Otherwise, if the candidate low boundary is greater than the maximum value, then the low boundary is the maximum value. Otherwise, the low boundary is the candidate low boundary.

The high boundary If the attribute is specified and a value could be parsed out of it, then the candidate high boundary is that value. Otherwise, the candidate high boundary is the same as the maximum value. If the candidate high boundary is less than the low boundary, then the high boundary is the low boundary. Otherwise, if the candidate high boundary is greater than the maximum value, then the high boundary is the maximum value. Otherwise, the high boundary is the candidate high boundary.

The optimum point If the attribute is specified and a value could be parsed out of it, then the candidate optimum point is that value. Otherwise, the candidate optimum point is the midpoint between the minimum value and the maximum value. If the candidate optimum point is less than the minimum value, then the optimum point is the minimum value. Otherwise, if the candidate optimum point is greater than the maximum value, then the optimum point is the maximum value. Otherwise, the optimum point is the candidate optimum point. The following markup: Suggested groups comp.infosystems.www.authoring.stylesheets - join Group description: Layout/presentation on the WWW.

Moderate activity, Usenet, 618 subscribers netscape.public.mozilla.xpinstall - join Group description: Mozilla XPInstall discussion. Low activity, Usenet, 22 subscribers mozilla.dev.general - join Low activity, Usenet, 66 subscribers Might be rendered as follows: User agents may combine the value of the attribute and the other attributes to provide context-sensitive help or inline text detailing the actual values.

The value IDL attribute, on getting, must return the. On setting, the given value must be converted to the and then the content attribute must be set to that string. The min IDL attribute, on getting, must return the. On setting, the given value must be converted to the and then the content attribute must be set to that string. The max IDL attribute, on getting, must return the.

On setting, the given value must be converted to the and then the content attribute must be set to that string. The low IDL attribute, on getting, must return the. On setting, the given value must be converted to the and then the content attribute must be set to that string. The high IDL attribute, on getting, must return the.

On setting, the given value must be converted to the and then the content attribute must be set to that string. The optimum IDL attribute, on getting, must return the. On setting, the given value must be converted to the and then the content attribute must be set to that string. The IDL attribute provides a list of the element's s.

This example shows a element being used to group a set of related controls: Display Black on White White on Black Use grayscale Enhance contrast The div elements used in the code samples above and below are not intended to convey any semantic meaning and are used only to create a non-inline rendering of the grouped fieldset controls. The following snippet shows a fieldset with a checkbox in the legend that controls whether or not the fieldset is enabled. The contents of the fieldset consist of two required text fields and an optional year/month control. Use Club Card Name on card: Card number: Expiry date. The form IDL attribute's behavior depends on whether the element is in a element or not. If the has a element as its parent, then the IDL attribute must return the same value as the IDL attribute on that element. Otherwise, it must return null.

4.10.18 Form control infrastructure 4.10.18.1 A form control's value Form controls have a value and a checkedness. (The latter is only used by elements.) These are used to describe how the user interacts with the control. To define the behaviour of constraint validation in the face of the element's attribute, elements can also have separately defined value s. 4.10.18.2 Mutability A form control can be designated as mutable. This determines (by means of definitions and requirements in this specification that rely on whether an element is so designated) whether or not the user can modify the or of a form control, or whether or not a control can be automatically prefilled. 4.10.18.3 Association of controls and forms A can have a relationship with a element, which is called the element's form owner. If a is not associated with a element, its is said to be null.

A is, by default, associated with its nearest ancestor element (as described below), but, if it is, may have a form attribute specified to override this. This feature allows authors to work around the lack of support for nested elements. If a has a attribute specified, then that attribute's value must be the of a element in the element's owner. The rules in this section are complicated by the fact that although conforming documents will never contain nested elements, it is quite possible (e.g. Using a script that performs DOM manipulation) to generate documents that have such nested elements. They are also complicated by rules in the HTML parser that, for historical reasons, can result in a being associated with a element that is not its ancestor. When a is created, its must be initialized to null (no owner).

When a is to be associated with a form, its must be set to that form. When a or one of its ancestors is, then the user agent must of that. The overrides this requirement when inserting form controls. When an element is resulting in a and its (if any) no longer being in the same, then the user agent must of that. When a 's attribute is set, changed, or removed, then the user agent must of that element. When a has a attribute and the of any of the elements in the changes, then the user agent must of that.

When a has a attribute and an element with an is or the, then the user agent must of that. When the user agent is to reset the form owner of a, it must run the following steps: • If the element's is not null, and either the element is not or its content attribute is not present, and the element's is its nearest element ancestor after the change to the ancestor chain, then do nothing, and abort these steps. • Let the element's be null. • If the element is, has a content attribute, and is itself, then run these substeps: • If the first element to have an that is equal to the element's content attribute's value is a element, then the with that element. • Abort the 'reset the form owner' steps.

• Otherwise, if the in question has an ancestor element, then the with the nearest such ancestor element. • Otherwise, the element is left unassociated. In the following non-conforming snippet. document.getElementById('b').innerHTML = '

' + '';. The of 'd' would be the inner nested form 'c', while the of 'e' would be the outer form 'a'. This happens as follows: First, the 'e' node gets associated with 'c' in the. Then, the algorithm moves the nodes from the temporary document to the 'b' element.

At this point, the nodes see their ancestor chain change, and thus all the 'magic' associations done by the parser are reset to normal ancestor associations. This example is a non-conforming document, though, as it is a violation of the content models to nest elements. Returns the element's. Returns null if there isn't one. Have a form IDL attribute, which, on getting, must return the element's, or null if there isn't one.

4.10.19 Attributes common to form controls 4.10.19.1 Naming form controls: the attribute The name content attribute gives the name of the form control, as used in and in the element's object. If the attribute is specified, its value must not be the empty string. Any non-empty value for is allowed, but the names ' ' and ' ' are special: isindex This value, if used as the name of a control that is the first control in a form that is submitted using the mechanism, causes the submission to only include the value of this control, with no name. _charset_ This value, if used as the name of a control with no attribute, is automatically given a value during submission consisting of the submission character encoding. Constraint validation: If an element has a, its dirty value flag is true, its was last changed by a user edit (as opposed to a change made by a script), and the of the element's is greater than the element's, then the element is. User agents may prevent the user from causing the element's to be set to a value whose is greater than the element's. 4.10.19.4 Setting minimum input length requirements: the attribute A form control minlength attribute, controlled by a dirty value flag, declares a lower bound on the number of characters a user can input.

The attribute does not imply the required attribute. If the form control has no attribute, then the value can still be omitted; the attribute only kicks in once the user has entered a value at all. If the empty string is not allowed, then the required attribute also needs to be set.

If an element has its specified, the attribute's value must be a. If the attribute is specified and applying the to its value results in a number, then that number is the element's minimum allowed value length. If the attribute is omitted or parsing its value results in an error, then there is no. If an element has both a and a, the must be smaller than or equal to the. In this example, there are four text fields.

The first is required, and has to be at least 5 characters long. The other three are optional, but if the user fills one in, the user has to enter at least 10 characters. Name of Event: Describe what you would like for breakfast, if anything: Describe what you would like for lunch, if anything: Describe what you would like for dinner, if anything: 4.10.19.5 Enabling and disabling form controls: the attribute The disabled content attribute is a. A form control is disabled if its attribute is set, or if it is a descendant of a element whose attribute is set and is not a descendant of that element's first element child, if any. A form control that is must prevent any events that are on the from being dispatched on the element. Constraint validation: If an element is, it is.

The disabled IDL attribute must the content attribute. 4.10.19.6 Form submission Attributes for form submission can be specified both on elements and on (elements that represent buttons that submit forms, e.g. An element whose attribute is in the state). The that may be specified on elements are,,,, and.

The corresponding that may be specified on are,,,, and. When omitted, they default to the values given on the corresponding attributes on the element.

The action and formaction content attributes, if specified, must have a value that is a. The action of an element is the value of the element's attribute, if the element is a and has such an attribute, or the value of its 's attribute, if it has one, or else the empty string. The method and formmethod content attributes are with the following keywords and states: • The keyword get, mapping to the state GET, indicating the HTTP GET method. • The keyword post, mapping to the state POST, indicating the HTTP POST method.

The invalid value default for these attributes is the state. The missing value default for the attribute is also the state. (There is no missing value default for the attribute.) The method of an element is one of those states. If the element is a and has a attribute, then the element's is that attribute's state; otherwise, it is the 's attribute's state. On the other hand, here the attribute is used to specify the value ' ', so that the user's message is submitted in the HTTP request's body: Message: The enctype and formenctype content attributes are with the following keywords and states: • The ' application/x-www-form-urlencoded' keyword and corresponding state.

• The ' multipart/form-data' keyword and corresponding state. • The ' text/plain' keyword and corresponding state. The invalid value default for these attributes is the state. The missing value default for the attribute is also the state. (There is no missing value default for the attribute.) The enctype of an element is one of those three states. If the element is a and has a attribute, then the element's is that attribute's state; otherwise, it is the 's attribute's state.

The target and formtarget content attributes, if specified, must have values that are. The target of an element is the value of the element's attribute, if the element is a and has such an attribute; or the value of its 's attribute, if it has such an attribute; or, if the contains a element with a attribute, then the value of the attribute of the first such element; or, if there is no such element, the empty string. The novalidate and formnovalidate content attributes are.

If present, they indicate that the form is not to be validated during submission. The no-validate state of an element is true if the element is a and the element's attribute is present, or if the element's 's attribute is present, and false otherwise. This attribute is useful to include 'save' buttons on forms that have validation constraints, to allow users to save their progress even though they haven't fully entered the data in the form. The following example shows a simple form that has two required fields. There are three buttons: one to submit the form, which requires both fields to be filled in; one to save the form so that the user can come back and fill it in later; and one to cancel the form altogether.

Name: Essay:

The noValidate IDL attribute must the content attribute. The formAction IDL attribute must the content attribute, except that on getting, when the content attribute is missing or its value is the empty string, must be returned instead. The formEnctype IDL attribute must the content attribute,. The formMethod IDL attribute must the content attribute,. The formNoValidate IDL attribute must the content attribute. The formTarget IDL attribute must the content attribute.

4.10.19.7 Autofocusing a form control: the attribute The autofocus content attribute allows the author to indicate that a control is to be focused as soon as the page is loaded, allowing the user to just start typing without having to manually focus the main control. The attribute is a. An element's nearest ancestor autofocus scoping root element is the element's. There must not be two elements with the same that both have the attribute specified. When an element with the attribute specified is, user agents should run the following steps: • Let target be the element's. • If target has no, abort these steps.

• If target's has no (e.g. It is a with no ), abort these steps. • If target's has the, abort these steps. • If target's is not the as the of the of the currently focused element in target's, abort these steps. • If target's is not the as the of the of target's, abort these steps. • If the user agent has already reached the last step of this list of steps in response to an element being into a whose 's is the same as target's 's, abort these steps.

• If the user has indicated (for example, by starting to type in a form control) that he does not wish focus to be changed, then optionally abort these steps. • that checks to see if the element is, and if so, runs the for that element.

User agents may also change the scrolling position of the document, or perform some other action that brings the element to the user's attention. The for this task is the. This handles the automatic focusing during document load.

Focusing the control does not imply that the user agent must focus the browser window if it has lost focus. The autofocus IDL attribute must the content attribute of the same name. In the following snippet, the text control would be focused when the document was loaded. 4.10.19.8 Autofilling form controls: the attribute User agents sometimes have features for helping users fill forms in, for example prefilling the user's address based on earlier user input.

The autocomplete content attribute can be used to hint to the user agent how to, or indeed whether to, provide such a feature. For elements, calling these methods while they, and getting or setting these attributes while they, must throw an exception. Otherwise, they must act as described below. For elements, these methods and attributes must operate on the element's. For elements, these methods and attributes must operate on the element's.

Where possible, user interface features for changing the text selection in and elements must be implemented in terms of the DOM API described in this section, so that, e.g., all the same events fire. The selections of and elements have a direction, which is either forward, backward, or none. This direction is set when the user manipulates the selection.

The exact meaning of the selection direction depends on the platform. On Windows, the direction indicates the position of the caret relative to the selection: a forward selection has the caret at the end of the selection and a backward selection has the caret at the start of the selection. Windows has no none direction. On Mac, the direction indicates which end of the selection is affected when the user adjusts the size of the selection using the arrow keys with the Shift modifier: the forward direction means the end of the selection is modified, and the backwards direction means the start of the selection is modified. The none direction is the default on Mac, it indicates that no particular direction has yet been selected. The user sets the direction implicitly when first adjusting the selection, based on which directional arrow key was used.

The select() method must cause the contents of the text field to be fully selected, with the selection direction being none, if the platform support selections with the direction none, or otherwise forward. The user agent must then to that bubbles named select at the element, using the as the task source. The selectionStart attribute must, on getting, return the offset (in logical order) to the character that immediately follows the start of the selection. If there is no selection, then it must return the offset (in logical order) to the character that immediately follows the text entry cursor. On setting, it must act as if the method had been called, with the new value as the first argument; the current value of the attribute as the second argument, unless the current value of the is less than the new value, in which case the second argument must also be the new value; and the current value of the as the third argument. The selectionEnd attribute must, on getting, return the offset (in logical order) to the character that immediately follows the end of the selection. If there is no selection, then it must return the offset (in logical order) to the character that immediately follows the text entry cursor.

On setting, it must act as if the method had been called, with the current value of the attribute as the first argument, the new value as the second argument, and the current value of the as the third argument. The selectionDirection attribute must, on getting, return the string corresponding to the current selection direction: if the direction is forward, ' forward'; if the direction is backward, ' backward'; and otherwise, ' none'. On setting, it must act as if the method had been called, with the current value of the attribute as the first argument, the current value of the attribute as the second argument, and the new value as the third argument. The setSelectionRange( start, end, direction) method must set the selection of the text field to the sequence of characters starting with the character at the startth position (in logical order) and ending with the character at the ( end-1)th position. Arguments greater than the length of the value of the text field must be treated as pointing at the end of the text field. If end is less than or equal to start then the start of the selection and the end of the selection must both be placed immediately before the character with offset end.

In UAs where there is no concept of an empty selection, this must set the cursor to be just before the character with offset end. The direction of the selection must be set to backward if direction is a match for the string ' backward', forward if direction is a match for the string ' forward' or if the platform does not support selections with the direction none, and none otherwise (including if the argument is omitted). The user agent must then to that bubbles named select at the element, using the as the task source. The setRangeText( replacement, start, end, selectMode) method must run the following steps: • If the method has only one argument, then let start and end have the values of the attribute and the attribute respectively. Otherwise, let start, end have the values of the second and third arguments respectively.

• If start is greater than end, then throw an exception and abort these steps. • If start is greater than the length of the value of the text field, then set it to the length of the value of the text field. • If end is greater than the length of the value of the text field, then set it to the length of the value of the text field. • Let selection start be the current value of the attribute. • Let selection end be the current value of the attribute. • If start is less than end, delete the sequence of characters starting with the character at the startth position (in logical order) and ending with the character at the ( end-1)th position. • Insert the value of the first argument into the text of the value of the text field, immediately before the startth character.

• Let new length be the length of the value of the first argument. • Let new end be the sum of start and new length. • Run the appropriate set of substeps from the following list: If the fourth argument's value is ' select' Let selection start be start. Let selection end be new end. If the fourth argument's value is ' start' Let selection start and selection end be start. If the fourth argument's value is ' end' Let selection start and selection end be new end. If the fourth argument's value is ' preserve' (the default) • Let old length be end minus start.• Let delta be new length minus old length.• If selection start is greater than end, then increment it by delta.

(If delta is negative, i.e. The new text is shorter than the old text, then this will decrease the value of selection start.) Otherwise: if selection start is greater than start, then set it to start. (This snaps the start of the selection to the start of the new text if it was in the middle of the text that it replaced.) • If selection end is greater than end, then increment it by delta in the same way. Otherwise: if selection end is greater than start, then set it to new end.

(This snaps the end of the selection to the end of the new text if it was in the middle of the text that it replaced.) • Set the selection of the text field to the sequence of characters starting with the character at the selection startth position (in logical order) and ending with the character at the ( selection end-1)th position. In UAs where there is no concept of an empty selection, this must set the cursor to be just before the character with offset end. The direction of the selection must be set to forward if the platform does not support selections with the direction none, and none otherwise. • to that bubbles named select at the element, using the as the task source. All elements to which this API have either a selection or a text entry cursor position at all times (even for elements that are not ). User agents should follow platform conventions to determine their initial state.

Characters with no visible rendering, such as U+200D ZERO WIDTH JOINER, still count as characters. Thus, for instance, the selection can include just an invisible character, and the text insertion cursor can be placed to one side or another of such a character. A is a candidate for constraint validation except when a condition has barred the element from constraint validation. (For example, an element is if it is an element.) An element can have a custom validity error message defined. Initially, an element must have its set to the empty string. When its value is not the empty string, the element is. It can be set using the method.

The user agent should use the when alerting the user to the problem with the control. An element can be constrained in various ways. The following is the list of validity states that a form control can be in, making the control invalid for the purposes of constraint validation. (The definitions below are non-normative; other parts of this specification define more precisely when each state applies or does not.) Suffering from being missing When a control has no but has a required attribute (,, ), or, in the case of an element in a, any of the other elements in the group has a attribute. Suffering from a type mismatch When a control that allows arbitrary user input has a that is not in the correct syntax (, ). Suffering from a pattern mismatch When a control has a that doesn't satisfy the attribute.

Suffering from being too long When a control has a that is too long for the (, ). Suffering from being too short When a control has a that is too short for the (, ). Suffering from an underflow When a control has a that is too low for the attribute. Suffering from an overflow When a control has a that is too high for the attribute. Suffering from a step mismatch When a control has a that doesn't fit the rules given by the attribute.

Suffering from bad input When a control has incomplete input and the user agent does not think the user ought to be able to submit the form in its current state. Suffering from a custom error When a control's (as set by the element's method) is not the empty string. An element can still suffer from these states even when the element is; thus these states can be represented in the DOM even if validating the form during submission wouldn't indicate a problem to the user. An element satisfies its constraints if it is not suffering from any of the above. 4.10.21.2 Constraint validation When the user agent is required to statically validate the constraints of element form, it must run the following steps, which return either a positive result (all the controls in the form are valid) or a negative result (there are invalid controls) along with a (possibly empty) list of elements that are invalid and for which no script has claimed responsibility: • Let controls be a list of all the whose is form, in. • Let invalid controls be an initially empty list of elements. • For each element field in controls, in, run the following substeps: • If field is not a, then move on to the next element.

• Otherwise, if field, then move on to the next element. • Otherwise, add field to invalid controls. • If invalid controls is empty, then return a positive result and abort these steps. • Let unhandled invalid controls be an initially empty list of elements. • For each element field in invalid controls, if any, in, run the following substeps: • named invalid that is cancelable at field. • If the event was not canceled, then add field to unhandled invalid controls.

• Return a negative result with the list of elements in the unhandled invalid controls list. If a user agent is to interactively validate the constraints of element form, then the user agent must run the following steps: • of form, and let unhandled invalid controls be the list of elements returned if the result was negative. • If the result was positive, then return that result and abort these steps. • Report the problems with the constraints of at least one of the elements given in unhandled invalid controls to the user.

User agents may focus one of those elements in the process, by running the for that element, and may change the scrolling position of the document, or perform some other action that brings the element to the user's attention. User agents may report more than one constraint violation. User agents may coalesce related constraint violation reports if appropriate (e.g. If multiple radio buttons in a are marked as required, only one error need be reported). If one of the controls is not (e.g. It has the attribute set) then user agents may report a script error. • Return a negative result.

4.10.21.3 The constraint validation API element. Returns true if the element will be validated when the form is submitted; false otherwise. ( message) Sets a custom error, so that the element would fail to validate. The given message is the message to be shown to the user when reporting the problem to the user. If the argument is the empty string, clears the custom error. Returns true if the element has no value but is a required field; false otherwise. Returns true if the element's value is not in the correct syntax; false otherwise.

Returns true if the element's value doesn't match the provided pattern; false otherwise. Returns true if the element's value is longer than the provided maximum length; false otherwise. Returns true if the element's value, if it is not the empty string, is shorter than the provided minimum length; false otherwise.

Returns true if the element's value is lower than the provided minimum; false otherwise. Returns true if the element's value is higher than the provided maximum; false otherwise.

Returns true if the element's value doesn't fit the rules given by the attribute; false otherwise. Returns true if the user has provided input in the user interface that the user agent is unable to convert to a value; false otherwise. Returns true if the element has a custom error; false otherwise. Returns true if the element's value has no validity problems; false otherwise. Valid = element. () Returns true if the element's value has no validity problems; false otherwise. Fires an invalid event at the element in the latter case.

Returns the error message that would be shown to the user if the element was to be checked for validity. 4.10.22.1 Introduction This section is non-normative. When a form is submitted, the data in the form is converted into the structure specified by the, and then sent to the destination specified by the using the given. For example, take the following form: If the user types in 'cats' in the first field and 'fur' in the second, and then hits the submit button, then the user agent will load /find.cgi?t=cats&q=fur. On the other hand, consider this form: Given the same user input, the result on submission is quite different: the user agent instead does an HTTP POST to the given URL, with as the entity body something like the following text: ------kYFrd4jNJEgCervE Content-Disposition: form-data; name='t' cats ------kYFrd4jNJEgCervE Content-Disposition: form-data; name='q' fur ------kYFrd4jNJEgCervE. 4.10.22.2 Implicit submission A element's default button is the first in whose is that element.

If the user agent supports letting the user submit a form implicitly (for example, on some platforms hitting the 'enter' key while a text field is focused implicitly submits the form), then doing so for a form whose has a defined must cause the user agent to on that. Consequently, if the is, the form is not submitted when such an implicit submission mechanism is used. (A button has no when disabled.) There are pages on the Web that are only usable if there is a way to implicitly submit forms, so user agents are strongly encouraged to support this. If the form has no, then the implicit submission mechanism must do nothing if the form has more than one field that blocks implicit submission, and must the element from the element itself otherwise. For the purpose of the previous paragraph, an element is a field that blocks implicit submission of a element if it is an element whose is that element and whose attribute is in one of the following states:,,,,,,. 4.10.22.3 Form submission algorithm When a element form is submitted from an element submitter (typically a button), optionally with a submitted from method flag set, the user agent must run the following steps: • Let form document be the form's.

• If form document has no associated or its has its set, then abort these steps without doing anything. • Let form browsing context be the of form document. • If the submitted from method flag is not set, and the submitter element's is false, then of form and examine the result: if the result is negative (the constraint validation concluded that there were invalid fields and probably informed the user of this) then named invalid at the form element and then abort these steps. • If the submitted from method flag is not set, then that bubbles and is cancelable named submit, at form. If the event's default action is prevented (i.e. If the event is canceled) then abort these steps. Otherwise, continue (effectively the default action is to perform the submission).

• Let form data set be the result of for form in the context of submitter. • Let action be the submitter element's. • If action is the empty string, let action be of the form document. • the URL action, relative to the submitter element. If this fails, abort these steps. • Let action be the resulting. • Let action components be the resulting.

• Let scheme be the of the resulting. • Let enctype be the submitter element's. • Let method be the submitter element's. • Let target be the submitter element's.

• If the user indicated a specific to use when submitting the form, then let target browsing context be that. Otherwise, apply using target as the name and form browsing context as the context in which the algorithm is executed, and let target browsing context be the resulting. • If target browsing context was created in the previous step, or, alternatively, if the form document has not yet and the submitted from method flag is set, then let replace be true. Otherwise, let it be false. • Otherwise, select the appropriate row in the table below based on the value of scheme as given by the first cell of each row.

Then, select the appropriate cell on that row based on the value of method as given in the first cell of each column. Then, jump to the steps named in that cell and defined below the table.

Http https ftp javascript data mailto If scheme is not one of those listed in this table, then the behavior is not defined by this specification. User agents should, in the absence of another specification defining this, act in a manner analogous to that defined in this specification for similar schemes. Each element has a planned navigation, which is either null or a; when the is first created, its must be set to null. In the behaviours described below, when the user agent is required to plan to navigate to a particular resource destination, it must run the following steps: • If the has a non-null, remove it from its. • Let the 's be a new that consists of running the following steps: • Let the 's be null.

• target browsing context to the particular resource destination. If replace is true, then target browsing context must be navigated with. For the purposes of this task, target browsing context and replace are the variables that were set up when the overall form submission algorithm was run, with their values as they stood when this was. • that is the 's new. The for this task is the. The behaviors are as follows: Mutate action URL Let query be the result of encoding the form data set using the, interpreted as a US-ASCII string.

Set parsed action's component to query. Let destination be a new URL formed by applying the algorithm to parsed action. To destination.

Submit as entity body Let entity body be the result of encoding the form data set using the. Let MIME type be determined as follows: If enctype is Let MIME type be ' application/x-www-form-urlencoded'. If enctype is Let MIME type be the concatenation of the string ' multipart/form-data;', a U+0020 SPACE character, the string ' boundary=', and the generated by the. If enctype is Let MIME type be ' text/plain'. Otherwise, to action using the HTTP method given by method and with entity body as the entity body, of type MIME type. Get action URL to action. The form data set is discarded.

Post to data: Let data be the result of encoding the form data set using the. If action contains the string '%%%%' (four U+0025 PERCENT SIGN characters), then all bytes in data that, if interpreted as US-ASCII, are not characters in the URL, and then, treating the result as a US-ASCII string, all the U+0025 PERCENT SIGN characters in the resulting string and replace the first occurrence of '%%%%' in action with the resulting doubly-escaped string. Otherwise, if action contains the string '%%' (two U+0025 PERCENT SIGN characters in a row, but not four), then all characters in data that, if interpreted as US-ASCII, are not characters in the URL, and then, treating the result as a US-ASCII string, replace the first occurrence of '%%' in action with the resulting escaped string. To the potentially modified action (which will be a ). Mail with headers Let headers be the resulting encoding the form data set using the, interpreted as a US-ASCII string. Replace occurrences of '+' (U+002B) characters in headers with the string '%20'.

Let destination consist of all the characters from the first character in action to the character immediately before the first '?' (U+003F) character, if any, or the end of the string if there are none. Append a single '?'

(U+003F) character to destination. Append headers to destination.

To destination. Mail as body Let body be the resulting of encoding the form data set using the and then all the bytes in the resulting byte string that, when interpreted as US-ASCII, are not characters in the URL. Let destination have the same value as action. If destination does not contain a '?' (U+003F) character, append a single '?' (U+003F) character to destination.

Otherwise, append a single U+0026 AMPERSAND character (&). Append the string ' body=' to destination. Append body, interpreted as a US-ASCII string, to destination. To destination. The appropriate form encoding algorithm is determined as follows: If enctype is Use the. If enctype is Use the. If enctype is Use the.

4.10.22.4 Constructing the form data set The algorithm to construct the form data set for a form form optionally in the context of a submitter submitter is as follows. If not specified otherwise, submitter is null. • Let controls be a list of all the whose is form, in. • Let the form data set be a list of name-value-type tuples, initially empty. • Loop: For each element field in controls, in, run the following substeps: • If any of the following conditions are met, then skip these substeps for this element: • The field element has a element ancestor. • The field element is. • The field element is a but it is not submitter.

• The field element is an element whose attribute is in the state and whose is false. • The field element is an element whose attribute is in the state and whose is false. • The field element is not an element whose attribute is in the state, and either the field element does not have a attribute specified, or its attribute's value is the empty string. • The field element is an element that is not using a.

Otherwise, process field as follows: • Let type be the value of the type IDL attribute of field. • If the field element is an element whose attribute is in the state, then run these further nested substeps: • If the field element has a attribute specified and its value is not the empty string, let name be that value followed by a single '.'

(U+002E) character. Otherwise, let name be the empty string. • Let name x be the string consisting of the concatenation of name and a single U+0078 LATIN SMALL LETTER X character (x). • Let name y be the string consisting of the concatenation of name and a single U+0079 LATIN SMALL LETTER Y character (y). • The field element is submitter, and before this algorithm was invoked the user. Let x be the x-component of the coordinate selected by the user, and let y be the y-component of the coordinate selected by the user. • Append an entry to the form data set with the name name x, the value x, and the type type.

• Append an entry to the form data set with the name name y and the value y, and the type type. • Skip the remaining substeps for this element: if there are any more elements in controls, return to the top of the loop step, otherwise, jump to the end step below. • Let name be the value of the field element's attribute. • If the field element is a element, then for each element in the element's whose is true and that is not, append an entry to the form data set with the name as the name, the of the element as the value, and type as the type.

• Otherwise, if the field element is an element whose attribute is in the state or the state, then run these further nested substeps: • If the field element has a attribute specified, then let value be the value of that attribute; otherwise, let value be the string ' on'. • Append an entry to the form data set with name as the name, value as the value, and type as the type. • Otherwise, if the field element is an element whose attribute is in the state, then for each file in the element, append an entry to the form data set with the name as the name, the file (consisting of the name, the type, and the body) as the value, and type as the type. If there are no, then append an entry to the form data set with the name as the name, the empty string as the value, and application/octet-stream as the type. • Otherwise, if the field element is an element: try to obtain a form submission value from the, and if that is successful, append an entry to the form data set with name as the name, the returned form submission value as the value, and the string ' object' as the type.

• Otherwise, append an entry to the form data set with name as the name, the of the field element as the value, and type as the type. • If the element has a attribute, and that attribute's value is not the empty string, then run these substeps: • Let dirname be the value of the element's attribute. • Let dir be the string ' ltr' if of the element is ', and ' rtl' otherwise (i.e. When of the element is '). • Append an entry to the form data set with dirname as the name, dir as the value, and the string ' direction' as the type.

An element can only have a attribute if it is a element or an element whose attribute is in either the state or the state. • End: For the name of each entry in the form data set, and for the value of each entry in the form data set whose type is not ' file' or ' textarea', replace every occurrence of a 'CR' (U+000D) character not followed by a 'LF' (U+000A) character, and every occurrence of a 'LF' (U+000A) character not preceded by a 'CR' (U+000D) character, by a two-character string consisting of a U+000D CARRIAGE RETURN 'CRLF' (U+000A) character pair. In the case of the of elements, this newline normalization is already performed during the conversion of the control's into the control's (which also performs any necessary line wrapping). In the case of elements attributes in the state, the value is not normalized. • Return the form data set. 4.10.22.5 Selecting a form submission encoding If the user agent is to pick an encoding for a form, optionally with an allow non-ASCII-compatible encodings flag set, it must run the following substeps: • Let input be the value of the element's attribute.

• Let candidate encoding labels be the result of. • Let candidate encodings be an empty list of. • For each token in candidate encoding labels in turn (in the order in which they were found in input), for the token and, if this does not result in failure, append the to candidate encodings. • If the allow non-ASCII-compatible encodings flag is not set, remove any encodings that are not from candidate encodings. • If candidate encodings is empty, return UTF-8 and abort these steps. • Each character encoding in candidate encodings can represent a finite number of characters. (For example, UTF-8 can represent all 1.1 million or so Unicode code points, while Windows-1252 can only represent 256.) For each encoding in candidate encodings, determine how many of the characters in the names and values of the entries in the form data set the encoding can represent (without ignoring duplicates).

Let max be the highest such count. (For UTF-8, max would equal the number of characters in the names and values of the entries in the form data set.) Return the first encoding in candidate encodings that can encode max characters in the names and values of the entries in the form data set. 4.10.22.6 URL-encoded form data This form data set encoding is in many ways an aberrant monstrosity, the result of many years of implementation accidents and compromises leading to a set of requirements necessary for interoperability, but in no way representing good design practices. In particular, readers are cautioned to pay close attention to the twisted details involving repeated (and in some cases nested) conversions between character encodings and byte sequences. The application/x-www-form-urlencoded encoding algorithm is as follows: • Let result be the empty string. • If the element has an attribute, let the selected character encoding be the result of.

Otherwise, if the element has no attribute, but the is an, then that is the selected character encoding. Otherwise, let the selected character encoding be UTF-8. • Let charset be the of the selected. • For each entry in the form data set, perform these substeps: • If the entry's name is ' ' and its type is ' hidden', replace its value with charset. • If the entry's type is ' file', replace its value with the file's name only.

• For each character in the entry's name and value that cannot be expressed using the selected character encoding, replace the character by a string consisting of a U+0026 AMPERSAND character (&), a '#' (U+0023) character, one or more representing the Unicode code point of the character in base ten, and finally a ';' (U+003B) character. • Encode the entry's name and value using the for the selected character encoding. The entry's name and value are now byte strings. • For each byte in the entry's name and value, apply the appropriate subsubsteps from the following list: If the byte is 0x20 (U+0020 SPACE if interpreted as ASCII) Replace the byte with a single 0x2B byte ('+' (U+002B) character if interpreted as ASCII). If the byte is in the range 0x2A, 0x2D, 0x2E, 0x30 to 0x39, 0x41 to 0x5A, 0x5F, 0x61 to 0x7A Leave the byte as is. Otherwise • Let s be a string consisting of a U+0025 PERCENT SIGN character (%) followed by representing the hexadecimal value of the byte in question (zero-padded if necessary).

• Encode the string s as US-ASCII, so that it is now a byte string.• Replace the byte in question in the name or value being processed by the bytes in s, preserving their relative order. • Interpret the entry's name and value as Unicode strings encoded in US-ASCII. (All of the bytes in the string will be in the range 0x00 to 0x7F; the high bit will be zero throughout.) The entry's name and value are now Unicode strings again.

• If the entry's name is ' ', its type is ' text', and this is the first entry in the form data set, then append the value to result and skip the rest of the substeps for this entry, moving on to the next entry, if any, or the next step in the overall algorithm otherwise. • If this is not the first entry, append a single U+0026 AMPERSAND character (&) to result. • Append the entry's name to result. • Append a single '=' (U+003D) character to result. • Append the entry's value to result. • Encode result as US-ASCII and return the resulting byte stream.

To decode application/x-www-form-urlencoded payloads, the following algorithm should be used. This algorithm uses as inputs the payload itself, payload, consisting of a Unicode string using only characters in the range U+0000 to U+007F; a default character encoding encoding; and optionally an isindex flag indicating that the payload is to be processed as if it had been generated for a form containing an control. The output of this algorithm is a sorted list of name-value pairs. If the isindex flag is set and the first control really was an control, then the first name-value pair will have as its name the empty string. Which default character encoding to use can only be determined on a case-by-case basis, but generally the best character encoding to use as a default is the one that was used to encode the page on which the form used to create the payload was itself found. In the absence of a better default, UTF-8 is suggested. The isindex flag is for legacy use only.

Forms in conforming HTML documents will not generate payloads that need to be decoded with this flag set. • Let strings be the result of payload on U+0026 AMPERSAND characters (&). • If the isindex flag is set and the first string in strings does not contain a '=' (U+003D) character, insert a '=' (U+003D) character at the start of the first string in strings. • Let pairs be an empty list of name-value pairs. • For each string string in strings, run these substeps: • If string contains a '=' (U+003D) character, then let name be the substring of string from the start of string up to but excluding its first '=' (U+003D) character, and let value be the substring from the first character, if any, after the first '=' (U+003D) character up to the end of string. If the first '=' (U+003D) character is the first character, then name will be the empty string. If it is the last character, then value will be the empty string.

Otherwise, string contains no '=' (U+003D) characters. Let name have the value of string and let value be the empty string.

• Replace any '+' (U+002B) characters in name and value with U+0020 SPACE characters. • Replace any escape in name and value with the character represented by the escape. This replacement must not be recursive. An escape is a '%' (U+0025) character followed by two.

The character represented by an escape is the Unicode character whose code point is equal to the value of the two characters after the '%' (U+0025) character, interpreted as a hexadecimal number (in the range 0.255). So for instance the string ' A%2BC' would become ' A+C'. Similarly, the string ' 100%25AA%21' becomes the string ' 100%AA!' • Convert the name and value strings to their byte representation in ISO-8859-1 (i.e. Convert the Unicode string to a byte string, mapping code points to byte values directly). • Add a pair consisting of name and value to pairs.

• If any of the name-value pairs in pairs have a name component consisting of the string ' _charset_' encoded in US-ASCII, and the value component of the first such pair, when decoded as US-ASCII, is the name of a supported character encoding, then let encoding be that character encoding (replacing the default passed to the algorithm). • Convert the name and value components of each name-value pair in pairs to Unicode by interpreting the bytes according to the encoding encoding. • Return pairs. Parameters on the MIME type are ignored.

In particular, this MIME type does not support the charset parameter. 4.10.22.7 Multipart form data. The multipart/form-data encoding algorithm is as follows: • Let result be the empty string. • If the algorithm was invoked with an explicit character encoding, let the selected character encoding be that encoding. (This algorithm is used by other specifications, which provide an explicit character encoding to avoid the dependency on the element described in the next paragraph.) Otherwise, if the element has an attribute, let the selected character encoding be the result of. Otherwise, if the element has no attribute, but the is an, then that is the selected character encoding.

Otherwise, let the selected character encoding be UTF-8. • Let charset be the of the selected. • For each entry in the form data set, perform these substeps: • If the entry's name is ' ' and its type is ' hidden', replace its value with charset. • For each character in the entry's name and value that cannot be expressed using the selected character encoding, replace the character by a string consisting of a U+0026 AMPERSAND character (&), a '#' (U+0023) character, one or more representing the Unicode code point of the character in base ten, and finally a ';' (U+003B) character. • Encode the (now mutated) form data set using the rules described by RFC 2388, Returning Values from Forms: multipart/form-data, and return the resulting byte stream. Each entry in the form data set is a field, the name of the entry is the field name and the value of the entry is the field value. The order of parts must be the same as the order of fields in the form data set.

Multiple entries with the same name must be treated as distinct fields. In particular, this means that multiple files submitted as part of a single element will result in each file having its own field; the 'sets of files' feature (' multipart/mixed') of RFC 2388 is not used. The parts of the generated multipart/form-data resource that correspond to non-file fields must not have a header specified. Their names and values must be encoded using the character encoding selected above (field names in particular do not get converted to a 7-bit safe encoding as suggested in RFC 2388).

File names included in the generated multipart/form-data resource (as part of file fields) must use the character encoding selected above, though the precise name may be approximated if necessary (e.g. Newlines could be removed from file names, quotes could be changed to '%22', and characters not expressible in the selected character encoding could be replaced by other characters). User agents must not use the RFC 2231 encoding suggested by RFC 2388. The boundary used by the user agent in generating the return value of this algorithm is the multipart/form-data boundary string. (This value is used to generate the MIME type of the form submission payload generated by this algorithm.) For details on how to interpret multipart/form-data payloads, see RFC 2388. 4.10.22.8 Plain text form data. The text/plain encoding algorithm is as follows: • Let result be the empty string.

• If the element has an attribute, let the selected character encoding be the result of, with the allow non-ASCII-compatible encodings flag unset. Otherwise, if the element has no attribute, then that is the selected character encoding. • Let charset be the of the selected. • If the entry's name is ' ' and its type is ' hidden', replace its value with charset. • If the entry's type is ' file', replace its value with the file's name only. • For each entry in the form data set, perform these substeps: • Append the entry's name to result.

• Append a single '=' (U+003D) character to result. • Append the entry's value to result. • Append a 'CR' (U+000D) 'LF' (U+000A) character pair to result.

• Encode result using the for the selected character encoding and return the resulting byte stream. Payloads using the text/plain format are intended to be human readable. They are not reliably interpretable by computer, as the format is ambiguous (for example, there is no way to distinguish a literal newline in a value from the newline at the end of the value).