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 key 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
scripts). |
autocomplete |
<form>, <input> |
Specifies whether the <form> or the <input> element should have autocomplete
enabled. |
autofocus |
<button>, <input>, <keygen>, <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 soon as 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. |
challenge |
<keygen> |
Specifies that the value of the <keygen> element should be challenged when
submitted. |
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 in 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. |
contextmenu |
Global Attributes |
Specifies a context menu for an element. The context menu appears when a
user right-clicks on the element. |
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. |
datetime |
<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>, <keygen>, <optgroup>, <option>, <select>,
<textarea> |
Specifies that a 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 Attributes |
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. |
form |
<button>, <fieldset>, <input>, <keygen>, <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. |
keytype |
<keygen> |
Specifies the security algorithm of the key. |
kind |
<track> |
Specifies the kind of text track. |
label |
<track> |
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. |
manifest |
<html> |
Specifies the address of the document's cache manifest (for offline
browsing). |
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> |
Specifies that the audio output of the video should be muted. |
name |
<button>, <fieldset>, <form>, <iframe>, <input>, <keygen>, <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. |
oncanplay |
<audio>, <embed>, <object>, <video> |
Script to be run when a file is ready to start playing (when it has buffered
enough to begin). |
oncanplaythrough |
<audio>, <video> |
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 <track> 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 at the end of a drag operation. |
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>, <video> |
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 ot 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 som content in an elements |
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 is ready to start playing. |
onplaying |
<audio>, <video> |
Script to be run when the media actually 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. |
onshow |
<menu> |
Script to be run when a <menu> element is shown as a context menu |
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 for 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 is changed which (includes setting the
volume to "mute"). |
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 |
<th> |
Specifies whether a header cell is a header for a column, row, or group of
columns or rows. |
scoped |
<style> |
Specifies that the styles only apply to this element's parent element and
that element's child elements |
selected |
<option> |
Specifies that an option should be pre-selected when the page loads. |
shape |
<area> |
Specifies the shape of the area. |
size |
<input>, <select> |
Specifies the width, in characters (for <input>) or specifies the number of
visible options (for <select>) |
sizes |
<link> |
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"). |
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 |
<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>, <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. |