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All HTML Attributes

Attribute	Belongs to	Description
accept	input	Specifies the types of files that the server accepts (only for type="file")
accept-charset	form	Specifies the character encodings that are to be used for the form submission
accesskey	Global Attributes	Specifies a shortcut ket to activate/focus an element
action	form	Specifies where to send the form-data when a form is submitted
align	Not supported in HTML 5	Specifies the alignment according to surrounding elements. Use CSS instead
alt	area, img, input	Specifies an alternate text when the original element fails to display
async	script	Specifies that the script is executed asynchronously (only for external script)
autocomplete	form, input	Specifies whether the form or the input element should have autocomplete enabled
autofocus	button, input, select, textarea	Specifies that the element should automatically get focus when the page loads
autoplay	audio, video	Specifies that the audio/video will start playing as soonas it is ready
bgcolor	Not.supported in HTML 5	Specifies the background color of an element. Use CSS instead
border	Not supported in HTML 5	Specifies the width of the border of an element. Use CSS instead
charset	meta, script	Specifies the character encoding
checked	input	Specifies that an input element should be pre-selected when the page loads(for type="checkbox" or type="radio")
cite	blockquote, del, ins, q	Specifies a URL which explains the quote/ deleted/ inserted text
class	Global Attributes	Specifies one or more classnames for an element (refers to a class in a style sheet)
color	Not supported by HTML 5	Specifies the text color of an element. Use CSS instead
cols	textarea	Specifies the visible width of a text area
colspan	td, th	Specifies the number of columns a table cell should span
content	meta	Gives the value associated with the http-equiv or name attribute
contenteditable	Global Attributes	Specifies whether the content of an element is editable or not
controls	audio, video	Specifies that audio/video controls should be displayed (such as a play/pause button etc)
coords	area	Specifies the coordinates of the area
data	object	Specifies the URL of the resource to be used by the object
data-*	Global Attributes	Used to store custom data private to the page or application
datatime	del, ins, time	Specifies the date and time
default	track	Specifies that the track is to be enabled if the user's preferences do not indicate that another track would be more appropriate
defer	script	Specifies that the script is executed when the page has finished parsing (only for external scripts)
dir	Global Attributes	Specifies the text direction for the content in an element
dirname	input, textarea	Specifies that the text direction will be submitted
disabled	button, fieldset, input, optgroup, option, select, textarea	Specifies that the specified element/group of elements should be disabled
download	a, area	Specifies that the target will be downloaded when a user clicks on the hyperlink
draggable	Global Attributes	Specifies whether an element is draggable or not
dropzone	Global Attributs	Specifies whether the dragged data is copied, moved, or linked, when dropped
enctype	form	Specifies how the form-data should be encoded when submitting it to the server (only for method="post")
for	label, output	Specifies which form element(s) a label/calculation is bound to
from	button, fieldset, input, label, meter, object, output, select, textarea	Specifies the name of the form the element belongs to
formaction	button, input	Specifies where to send the form-data when a form is submitted. Only for type="submit"
headers	td, th	Specifies one or more headers cells a cell is related to
height	canvas, embed, iframe, img, input, object, video	Specifies the height of the element
hidden	Global Attributes	Specifies that an element is not yet, or is no longer, relevant
high	meter	Specifies the range that is considered to be a high value
href	a, area, base, link	Specifies the URL of the page the link goes to
hreflang	a, area, link	Specifies the language of the linked document
http-equiv	meta	Provides an HTTP header for the information/value of the content attribute
id	Global Attributes	Specifies a unique id for an element
ismap	img	Specifies an image as a server-side image-map
kind	track	Specifies the kind of text track
label	track, option, optgroup	Specifies the title of the text track
lang	Global Attributes	Specifies the language of the element's content
list	input	Refers to a datalist element that contains pre-defined options for an input element
loop	audio, video	Specifies that the audio/video will start over again, every time it is finished
low	meter	Specifies the range that is considered to be a low value
max	input, meter, progress	Specifies the maximum value
maxlength	input, textarea	Specifies the maximum number of characters allowed in an element
media	a, area, link, source, style	Specifies what media/device the linked document is optimized for
method	form	Specifies the HTTP method to use when sending form-data
min	input, meter	Specifies a minimum value
multiple	input, select	Specifies that a user can enter more than one value
muted	video, audio	Specifies that the audio output of the video should be muted
name	button, fieldset, form, iframe, input, map, meta, object, output, param, select, textarea	Specifies the name of the element
novalidate	form	Specifies that the form should not be validated when submitted
onabort	audio, embed, img, object, video	Script to be run on abort
onafterprint	body	Script to be run after the document is printed
onbeforeprint	body	Script to be run before the document is printed
onbeforeunload	body	Script to be run when the document is about to be unloaded
onblur	All visible elements.	Script to be run when the element loses focus
oncanplaythrough	video, audio	Script to be run when a file can be played all the way to the end without pausing for buffering
onchange	All visible elements.	Script to be run when the value of the element is changed
onclick	All visible elements.	Script to be run when the element is being clicked
oncontextmenu	All visible elements.	Script to be run when a context menu is triggered
oncopy	All visible elements.	Script to be run when the content of the element is being copied
oncuechange	track	Script to be run when the cue changes in a element
oncut	All visible elements.	Script to be run when the content of the element is being cut
ondblclick	All visible elements.	Script to be run when the element is being double-clicked
ondrag	All visible elements.	Script to be run when the element is being dragged
ondragend	All visible elements.	Script to be run at the end of a drag operation
ondragenter	All visible elements.	Script to be run when an element has been dragged to a valid drop target
ondragleave	All visible elements.	Script to be run when an element leaves a valid drop target
ondragover	All visible elements.	Script to be run when an element is being dragged over a valid drop target
ondragstart	All visible elements.	Script to be run at the start of a drag operation
ondrop	All visible elements.	Script to be run when dragged element is being dropped
ondurationchange	audio, video	Script to be run when the length of the media changes
onemptied	audio, video	Script to be run when something bad happens and the file is suddenly unavailable (like unexpectedly disconnects)
onended	audio, videoi	Script to be run when the media has reach the end (a useful event for messages like "thanks for listening")
onerror	audio, body, embed, img, object, script, style, video	Script to be run when an error occurs
onfocus	All visible elements.	Script to be run when the element gets focus
onhashchange	body	Script to be run when there has been changes to the anchor part of the a URL
oninput	All visible elements.	Script to be run when the element gets user input
oninvalid	All visible elements.	Script to be run when the element is invalid
onkeydown	All visible elements.	Script to be run when a user is pressing a key
onkeypress	All visible elements.	Script to be run when a user presses a key
onkeyup	All visible elements.	Script to be run when a user releases a key
onload	body, iframe, img, input, link, script, style	Script to be run when the element is finished loading
onloadeddata	audio, video	Script to be run when media data is loaded
onloadedmetadata	audio, video	Script to be run when meta data (like dimensions and duration) are loaded
onloadstart	audio, video	Script to be run just as the file begins to load before anything is actually loaded
onmousedown	All visible elements.	Script to be run when a mouse button is pressed down on an element
onmousemove	All visible elements.	Script to be run as long as the mouse pointer is moving over an element
onmouseout	All visible elements.	Script to be run when a mouse pointer moves out of an element
onmouseover	All visible elements.	Script to be run when a mouse pointer moves over an element
onmouseup	All visible elements.	Script to be run when a mouse button is released over an element
onmousewheel	All visible elements.	Script to be run when a mouse wheel is being scrolled over an element
onoffline	body	Script to be run when the browser starts to work offline
ononline	body	Script to be run when the browser starts to work online
onpagehide	body	Script to be run when a user navigates away from a page
onpageshow	body	Script to be run when a user navigates to a page
onpaste	All visible elements.	Script to be run when the user pastes some content in an element
onpause	audio, video	Script to be run when the media is paused either by the user or programmatically
onplay	audio, video	Script to be run when the media has started playing
onplaying	audio, video	Script to be run when the media has started playing
onpopstate	body	Script to be run when the window's history changes.
onprogress	audio, video	Script to be run when the browser is in the process of getting the media data
onratechange	audio, video	Script to be run each time the playback rate changes (like when a user switches to a slow motion or fast forward mode).
onreset	form	Script to be run when a reset button in a form is clicked.
onresize	body	Script to be run when the browser window is being resized.
onscroll	All visible elements.	Script to be run when an element's scrollbar is being scrolled
onsearch	input	Script to be run when the user writes something in a search field (for input="search")
onseeked	audio, video	Script to be run when the seeking attribute is set to false indicating that seeking has ended
onseeking	audio, video	Script to be run when the seeking attribute is set to true indicating that seeking is active
onselect	All visible elements.	Script to be run when the element gets selected
onstalled	audio, video	Script to be run when the browser is unable to fetch the media data for whatever reason
onstorage	body	Script to be run when a Web Storage area is updated
onsubmit	form	Script to be run when a form is submitted
onsuspend	audio, video	Script to be run when fetching the media data is stopped before it is completely loaded for whatever reason
ontimeupdate	audio, video	Script to be run when the playing position has changed (like when the user fast forwards to a different point in the media)
ontoggle	details	Script to be run when the user opens or closes the details element
onunload	body	Script to be run when a page has unloaded (or the browser window has been closed)
onvolumechange	audio, video	Script to be run each time the volume of a video/audio has been changed
onwaiting	audio, video	Script to be run when the media has paused but is expected to resume (like when the media pauses to buffer more data)
onwheel	All visible elements.	Script to be run when the mouse wheel rolls up or down over an element
open	details	Specifies that the details should be visible (open) to the user
optimum	meter	Specifies what value is the optimal value for the gauge
pattern	input	Specifies a regular expression that an input element's value is checked against
placeholder	input, textarea	Specifies a short hint that describes the expected value of the element
poster	video	Specifies an image to be shown while the video is downloading, or until the user hits the play button
preload	audio, video	Specifies if and how the author thinks the audio/video should be loaded when the page loads
readonly	input, textarea	Specifies that the element is read-only
rel	a, area, link	Specifies the relationship between the current document and the linked document
required	input, select, textarea	Specifies that the element must be filled out before submitting the form
reversed	ol	Specifies that the list order should be descending (9,8,7...)
rows	textarea	Specifies the visible number of lines in a text area
rowspan	td, th	Specifies the number of rows a table cell should span
sandbox	iframe	Enables an extra set of restrictions for the content in an iframe
scope		Specifies whether a header cell is a header for a column, row, or group of columns or rows
selected	option	Specifies that an option should be pre-selected when the page loads
shape	area	Specifies the shape of the area
size	input, selected	Specifies the width, in characters (for input) or specifies the number of visible options (for select)
sizes	img, link, source	Specifies the size of the linked resource
span	col, colgroup	Specifies the number of columns to span
spellcheck	Global Attributes	Specifies whether the element is to have its spelling and grammar checked or not
src	audio, embed, iframe, img, input, script, source, track, video	Specifies the URL of the media file
srcdoc	iframe	Specifies the HTML content of the page to show in the iframe
srclang	track	Specifies the language of the track text data (required if kind="subtitles")
srcset	img, source	Specifies the URL of the image to use in different situations
start	ol	Specifies the start value of an ordered list
step	input	Specifies the legal number intervals for an input field
style	Global Attributes	Specifies an inline CSS style for an element
tabindex	Global Attributes	Specifies the tabbing order of an element
target	a, area, base, form	Specifies the target for where to open the linked document or where to submit the form
title	Global Attributes	Specifies extra information about an element
translate	Global Attributes	Specifies whether the content of an element should be translated or not
type	a, button, embed, input, link, menu, object, script, source, style	Specifies the type of element
usemap	img, object	Specifies an image as a client-side image-map
value	button, input, li, option, meter, progress, param	Specifies the value of the element
width	canvas, embed, iframe, img, input, object, video	Specifies the width of the element
wrap	textarea	Specifies how the text in a text area is to be wrapped when submitted in a form

All HTML Attributes 2.0