abbr
th
Alternative label to use for the header cell when referencing the cell in other contexts Text* accept
input
Hint for expected file type in file upload controls Set of comma-separated tokens* consisting of valid MIME types with no parameters or audio/*
, video/*
, or image/*
accept-charset
form
Character encodings to use for form submission Ordered set of unique space-separated tokens, ASCII case-insensitive, consisting of labels of ASCII-compatible character encodings* accesskey
HTML elements Keyboard shortcut to activate or focus element Ordered set of unique space-separated tokens, case-sensitive, consisting of one Unicode code point in length action
form
URL to use for form submission Valid non-empty URL potentially surrounded by spaces alt
area
; img
; input
Replacement text for use when images are not available Text* async
script
Execute script asynchronously Boolean attribute autocomplete
form
Default setting for autofill feature for controls in the form "on
"; "off
" autocomplete
input
; select
; textarea
Hint for form autofill feature Autofill field name and related tokens* autofocus
button
; input
; keygen
; select
; textarea
Automatically focus the form control when the page is loaded Boolean attribute autoplay
audio
; video
Hint that the media resource can be started automatically when the page is loaded Boolean attribute border
table
Explicit indication that the table
element is not being used for layout purposes The empty string, or "1
" challenge
keygen
String to package with the generated and signed public key Text charset
meta
Character encoding declaration Encoding label* charset
script
Character encoding of the external script resource Encoding label* checked
input
Whether the control is checked Boolean attribute cite
blockquote
; del
; ins
; q
Link to the source of the quotation or more information about the edit Valid URL potentially surrounded by spaces class
HTML elements Classes to which the element belongs Set of space-separated tokens cols
textarea
Maximum number of characters per line Valid non-negative integer greater than zero colspan
td
; th
Number of columns that the cell is to span Valid non-negative integer greater than zero content
meta
Value of the element Text* contenteditable
HTML elements Whether the element is editable "true
"; "false
" controls
audio
; video
Show user agent controls Boolean attribute coords
area
Coordinates for the shape to be created in an image map Valid list of integers* crossorigin
audio
; img
; link
; script
; video
How the element handles crossorigin requests "anonymous
"; "use-credentials
" data
object
Address of the resource Valid non-empty URL potentially surrounded by spaces datetime
del
; ins
Date and (optionally) time of the change Valid date string with optional time datetime
time
Machine-readable value Valid month string, valid date string, valid yearless date string, valid time string, valid floating date and time string, valid time-zone offset string, valid global date and time string, valid week string, valid non-negative integer, or valid duration string default
track
Enable the track if no other text track is more suitable Boolean attribute defer
script
Defer script execution Boolean attribute dir
HTML elements The text directionality of the element "ltr
"; "rtl
"; "auto
" dir
bdo
The text directionality of the element "ltr
"; "rtl
" dirname
input
; textarea
Name of form field to use for sending the element's directionality in form submission Text* disabled
button
; fieldset
; input
; keygen
; optgroup
; option
; select
; textarea
Whether the form control is disabled Boolean attribute download
a
; area
Whether to download the resource instead of navigating to it, and its file name if so Text enctype
form
Form data set encoding type to use for form submission "application/x-www-form-urlencoded
"; "multipart/form-data
"; "text/plain
" for
label
Associate the label with form control ID* for
output
Specifies controls from which the output was calculated Unordered set of unique space-separated tokens, case-sensitive, consisting of IDs* form
button
; fieldset
; input
; keygen
; label
; object
; output
; select
; textarea
Associates the control with a form
element ID* formaction
button
; input
URL to use for form submission Valid non-empty URL potentially surrounded by spaces formenctype
button
; input
Form data set encoding type to use for form submission "application/x-www-form-urlencoded
"; "multipart/form-data
"; "text/plain
" formmethod
button
; input
HTTP method to use for form submission "GET
"; "POST
" formnovalidate
button
; input
Bypass form control validation for form submission Boolean attribute formtarget
button
; input
Browsing context for form submission Valid browsing context name or keyword headers
td
; th
The header cells for this cell Unordered set of unique space-separated tokens, case-sensitive, consisting of IDs* height
canvas
; embed
; iframe
; img
; input
; object
; video
Vertical dimension Valid non-negative integer hidden
HTML elements Whether the element is relevant Boolean attribute high
meter
Low limit of high range Valid floating-point number* href
a
; area
Address of the hyperlink Valid URL potentially surrounded by spaces href
link
Address of the hyperlink Valid non-empty URL potentially surrounded by spaces href
base
Document base URL Valid URL potentially surrounded by spaces hreflang
a
; area
; link
Language of the linked resource Valid BCP 47 language tag http-equiv
meta
Pragma directive Text* id
HTML elements The element's ID Text* ismap
img
Whether the image is a server-side image map Boolean attribute keytype
keygen
The type of cryptographic key to generate Text* kind
track
The type of text track "subtitles
"; "captions
"; "descriptions
"; "chapters
"; "metadata
" label
optgroup
; option
; track
User-visible label Text lang
HTML elements Language of the element Valid BCP 47 language tag or the empty string list
input
List of autocomplete options ID* loop
audio
; video
Whether to loop the media resource Boolean attribute low
meter
High limit of low range Valid floating-point number* manifest
html
Application cache manifest Valid non-empty URL potentially surrounded by spaces max
input
Maximum value Varies* max
meter
; progress
Upper bound of range Valid floating-point number* maxlength
input
; textarea
Maximum length of value Valid non-negative integer media
link
; source
; style
Applicable media Valid media query mediagroup
audio
; video
Groups media elements together with an implicit MediaController
Text method
form
HTTP method to use for form submission "GET
"; "POST
"; min
input
Minimum value Varies* min
meter
Lower bound of range Valid floating-point number* minlength
input
; textarea
Minimum length of value Valid non-negative integer multiple
input
; select
Whether to allow multiple values Boolean attribute muted
audio
; video
Whether to mute the media resource by default Boolean attribute name
button
; fieldset
; input
; keygen
; output
; select
; textarea
Name of form control to use for form submission and in the form.elements
API Text* name
form
Name of form to use in the document.forms
API Text* name
iframe
; object
Name of nested browsing context Valid browsing context name or keyword name
map
Name of image map to reference from the usemap
attribute Text* name
meta
Metadata name Text* name
param
Name of parameter Text novalidate
form
Bypass form control validation for form submission Boolean attribute optimum
meter
Optimum value in gauge Valid floating-point number* pattern
input
Pattern to be matched by the form control's value Regular expression matching the JavaScript Pattern production placeholder
input
; textarea
User-visible label to be placed within the form control Text* poster
video
Poster frame to show prior to video playback Valid non-empty URL potentially surrounded by spaces preload
audio
; video
Hints how much buffering the media resource will likely need "none
"; "metadata
"; "auto
" readonly
input
; textarea
Whether to allow the value to be edited by the user Boolean attribute rel
a
; area
; link
Relationship between the document containing the hyperlink and the destination resource Set of space-separated tokens* required
input
; select
; textarea
Whether the control is required for form submission Boolean attribute reversed
ol
Number the list backwards Boolean attribute rows
textarea
Number of lines to show Valid non-negative integer greater than zero rowspan
td
; th
Number of rows that the cell is to span Valid non-negative integer sandbox
iframe
Security rules for nested content Unordered set of unique space-separated tokens, ASCII case-insensitive, consisting of "allow-forms
", "allow-pointer-lock
", "allow-popups
", "allow-same-origin
", "allow-scripts
and "allow-top-navigation
" spellcheck
HTML elements Whether the element is to have its spelling and grammar checked "true
"; "false
" scope
th
Specifies which cells the header cell applies to "row
"; "col
"; "rowgroup
"; "colgroup
" selected
option
Whether the option is selected by default Boolean attribute shape
area
The kind of shape to be created in an image map "circle
"; "default
"; "poly
"; "rect
" size
input
; select
Size of the control Valid non-negative integer greater than zero sizes
link
Sizes of the icons (for rel
="icon
") Unordered set of unique space-separated tokens, ASCII case-insensitive, consisting of sizes* span
col
; colgroup
Number of columns spanned by the element Valid non-negative integer greater than zero src
audio
; embed
; iframe
; img
; input
; script
; source
; track
; video
Address of the resource Valid non-empty URL potentially surrounded by spaces srcdoc
iframe
A document to render in the iframe
The source of an iframe
srcdoc
document* srclang
track
Language of the text track Valid BCP 47 language tag start
ol
Ordinal value of the first item Valid integer step
input
Granularity to be matched by the form control's value Valid floating-point number greater than zero, or "any
" style
HTML elements Presentational and formatting instructions CSS declarations* tabindex
HTML elements Whether the element is focusable, and the relative order of the element for the purposes of sequential focus navigation Valid integer target
a
; area
Browsing context for hyperlink navigation Valid browsing context name or keyword target
base
Default browsing context for hyperlink navigation and form submission Valid browsing context name or keyword target
form
Browsing context for form submission Valid browsing context name or keyword title
HTML elements Advisory information for the element Text title
abbr
; dfn
Full term or expansion of abbreviation Text title
input
Description of pattern (when used with pattern
attribute) Text title
link
Title of the link Text title
link
; style
Alternative style sheet set name Text translate
HTML elements Whether the element is to be translated when the page is localized "yes
"; "no
" type
a
; area
; link
Hint for the type of the referenced resource Valid MIME type type
button
Type of button "submit
"; "reset
"; "button
" type
embed
; object
; script
; source
; style
Type of embedded resource Valid MIME type type
input
Type of form control input
type keyword type
ol
Kind of list marker "1
"; "a
"; "A
"; "i
"; "I
" typemustmatch
object
Whether the type
attribute and the Content-Type value need to match for the resource to be used Boolean attribute usemap
img
; object
Name of image map to use Valid hash-name reference* value
button
; option
Value to be used for form submission Text value
data
Machine-readable value Text* value
input
Value of the form control Varies* value
li
Ordinal value of the list item Valid integer value
meter
; progress
Current value of the element Valid floating-point number value
param
Value of parameter Text width
canvas
; embed
; iframe
; img
; input
; object
; video
Horizontal dimension Valid non-negative integer wrap
textarea
How the value of the form control is to be wrapped for form submission "soft
"; "hard
"
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