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HTML | All Attributes

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Attribute Belongs to Description
accept <input> This defines the kinds of files the server can receive (only when using type="file").
accept-charset <form> This defines the specific way characters are coded for sending a form.
accesskey Global Attributes A shortcut key is a quick way to make an element active or bring it into focus.
action <form> Tells the browser where to send the form information when the form is submitted.
align Not supported in HTML 5. Describing the arrangement based on nearby items. Utilize CSS for this instead of copying.
alt <area>, , <input> When the original thing cannot be shown, an alternate text is given instead.
async <script> Indicates that the script is run in the background without waiting, but this applies only to external scripts.
autocomplete <form>, <input> Decides if the autocomplete feature should be turned on for either the <form> or the <input> element.
autofocus <button>, <input>, <select>, <textarea> Indicates that the element should receive focus as soon as the page finishes loading.
autoplay <audio>, <video> Indicates that the audio or video will begin playing as soon as it's prepared.
bgcolor Not supported in HTML 5. This sets the element's background color. Instead, employ CSS for this purpose.
border Not supported in HTML 5. Describes how thick the outline of an element is. Instead, employ CSS for this purpose.
charset <meta>, <script> Character encoding specifies how characters are represented
checked <input> Indicates that a checkbox or radio button should be already chosen when the webpage opens.
cite <blockquote>, <del>, <ins>, <q> Provides a web link that clarifies the quoted, removed, or added content.
class Global Attributes Indicates class names for an element (points to a class in a style sheet).
color Not supported in HTML 5. This defines the color of text in a part of a webpage. Instead, employ CSS for this purpose.
cols <textarea> Describes how wide a text area looks.
colspan <td>, <th> Indicates how many columns a table cell should cover.
content <meta> Provides the worth linked to the http-equiv or name feature.
contenteditable Global Attributes Indicates if the stuff inside an element can be changed or not.
controls <audio>, <video> Indicates that buttons for audio/video control (like play/pause) must be shown.
coords <area> Provides the exact location's points.
data <object> States the web address (URL) of the resource the object will utilize.
data-* Global Attributes Utilized for keeping personalized information exclusive to the webpage or application.
datetime <del>, <ins>, <time> Provides exact date and time information.
default <track> Indicates that track will be turned on if the user's choices don't show that a different track would be better.
defer <script> Indicates that the code runs after the webpage is done being read (for external scripts only).
dir Global Attributes Indicates the way text flows within an element.
dirname <input>, <textarea> Indicates that the orientation of the text will be sent.
disabled <button>, <fieldset>, <input>, <optgroup>, <option>, <select>, <textarea> Indicates that the chosen item or set of items must be deactivated.
download <a>, <area> This rule means that when someone clicks the link, the intended file will be downloaded.
draggable Global Attributes Indicates if an item can be dragged.
enctype <form> This tells how to format form-data for sending to the server (only when using method="post").
for <label>, <output> Indicates which form part(s) a label/calculation is connected to.
form <button>, <fieldset>, <input>, <label>, <meter>, <object>, <output>, <select>, <textarea> This phrase indicates the form's name that the element is a part of.
formaction <button>, <input> Tells the form where to send info when submitted. Only for "submit" buttons.
headers <td>, <th> Indicates which header cell(s) a cell is connected to.
height <canvas>, <embed>, <iframe>, <img>, <input>, <object>, <video> Indicates the element's vertical size.
hidden Global Attributes Indicates that something is currently unimportant or has become unimportant over time.
high <meter> Describes the scope of values that are seen as being large.
href <a>, <area>, <base>, <link> States the web address (URL) of the page the link directs to.
hreflang <a>, <area>, <link> Indicates the language of the linked file.
http-equiv <meta> Gives an HTTP header for the content attribute's data/value.
id Global Attributes Assigns a special code to an item
ismap <img> Describes an image for a server-based map.
kind <track> Describes the type of written content.
label <track>, <option>, <optgroup> Indicates the name of the song or text passage.
lang Global Attributes Indicates the language of the element's text.
list <input> Describes a '<datalist>' box with preset choices for an '<input>' box.
loop <audio>, <video> Indicates that the audio/video will replay from the beginning each time it ends.
low <meter> Describes the scope of numbers seen as small.
max <input>, <meter>, <progress> Describes the highest possible value.
maxlength <input>, <textarea> Indicates the highest character limit for an element.
media <a>, <area>, <link>, <source>, <style> Describes which media/device a linked document is best for.
method <form> Indicates the way to send form-data using HTTP.
min <input>, <meter> States the smallest value
multiple <input>, <select> Allows users to input multiple values.
muted <video>, <audio> Indicates that the sound from the video must be turned off.
name <button>, <fieldset>, <form>, <iframe>, <input>, <map>, <meta>, <object>, <output>, <param>, <select>, <textarea> States the element's name.
novalidate <form> Indicates that the form won't be checked when it's sent.
onabort <audio>, <embed>, <img>, <object>, <video> Script to be executed on abort
onafterprint <body> Script to be run after the code is executed
onbeforeprint <body> Script to be executed before the document is printed
onbeforeunload <body> Code to run when the document is about to be unloaded.
onblur All visible elements. Code to execute when an element no longer has focus
oncanplay <audio>, <embed>, <object>, <video> Code to execute when a file is prepared to start playing (once enough data is buffered).
oncanplaythrough <audio>, <video> Code for playing a file smoothly without buffering interruptions.
onchange All visible elements. Code to Execute When Element Value Changes.
onclick All visible elements. Code to run when the element is clicked.
oncontextmenu All visible elements. Code to Execute When Context Menu is Activated
oncopy All visible elements. Code to Execute When Element Content is Being Copied
oncuechange <track> Code to execute when the cue changes in a <track> element
oncut All visible elements. Code to execute when the text inside an element is being cut
ondblclick All visible elements. Code to execute when a user double-clicks on an element
ondrag All visible elements. Code to execute while an element is being dragged
ondragend All visible elements. Code to execute after a drag action is completed
ondragenter All visible elements. Code to execute when a thing is moved and placed onto the correct area
ondragleave All visible elements. Code to execute when an item is removed from an acceptable drop location
ondragover All visible elements. Code to execute when an item is moved over a valid destination
ondragstart All visible elements. Code to run when starting a drag operation.
ondrop All visible elements. Code to execute when a dragged item is released
ondurationchange <audio>, <video> Code to execute when the media length changes
onemptied <audio>, <video> Script acts when a problem occurs and a file becomes unavailable due to an unexpected disconnection
onended <audio>, <video> Code to run when media playback is complete.
onerror <audio>, <body>, <embed>, <img>, <object>, <script>, <style>, <video> Code to Execute When an Error Happens
onfocus All visible elements. Code to execute when an element gains focus.
onhashchange <body> Script that can be run when changes have been made to the anchor part of a URL
oninput All visible elements. Code to execute when an element receives user input.
oninvalid All visible elements. Code to execute when an element is not valid.
onkeydown All visible elements. Code to Execute When User Presses a Key.
onkeypress All visible elements. Code to Execute When a User Presses a Key.
onkeyup All visible elements. Code to Execute When a User Releases a Key.
onload <body>, <iframe>, <img>, <input>, <link>, <script>, <style> Code to Execute When Element Finishes Loading.
onloadeddata <audio>, <video> Code to Execute When Media Data is Loaded.
onloadedmetadata <audio>, <video> Code to execute when metadata (such as size and length) is loaded.
onloadstart <audio>, <video> Code to run at the start of a file's loading process, before any content loads.
onmousedown All visible elements. Code to execute when a mouse button is clicked on an element.
onmousemove All visible elements. Code to run as long as the mouse pointer moves over an element.
onmouseout All visible elements. Script that will run when a mouse pointer moves out of an element.
onmouseover All visible elements. Code to Execute When Mouse Pointer Moves Over an Element.
onmouseup All visible elements. Code to execute when a mouse button is let go on an element.
onmousewheel All visible elements. Code for detecting mouse wheel scrolling over an element.
onoffline <body> Script runs when the browser goes offline.
ononline <body> Code to execute when the browser connects to the internet.
onpagehide <body> Code to execute when a user leaves a webpage.
onpageshow <body> Code to run when a user visits a webpage.
onpaste All visible elements. Code to execute when a user pastes content into an element.
onpause <audio>, <video> Code to Execute When Media is Paused.
onplay <audio>, <video> Code to execute once the media begins playing.
onplaying <audio>, <video> Code to execute once media playback begins.
onpopstate <body> Code to execute when the browsing history of a window changes.
onprogress <audio>, <video> Code to execute when the browser is fetching media content.
onratechange <audio>, <video> Code to execute whenever the playback speed changes, such as when a user shifts to slow motion or fast forward mode.
onreset <form> Code to execute when a reset button in a form is pressed.
onresize <body> Code to execute when the size of the web browser window changes.
onscroll All visible elements. Code to be executed when the scrollbar of an element is being moved.
onsearch <input> Code to run when a user types something in a search box (like the ones with <input type="search">)
onseeked <audio>, <video> Code to run when the seeking attribute is changed to false, which means that seeking has finished.
onseeking <audio>, <video> Code to be executed when the "seeking" attribute is switched to true, indicating that the process of seeking is ongoing.
onselect All visible elements. Code to run when the item is chosen.
onstalled <audio>, <video> Code to run when the web browser can't get the pictures or videos for any reason.
onstorage <body> Code to execute when a change happens in a Web Storage area.
onsubmit <form> Code to be executed when a form is sent.
onsuspend <audio>, <video> Code to execute when the process of getting media information is halted before it's fully loaded, regardless of the cause.
ontimeupdate <audio>, <video> Run this script when the part you're watching changes (for example, when you skip ahead to a different point in the video).
ontoggle <details> Code to execute when the user opens or closes the<details> section.
onunload <body> Code to run when a webpage finishes closing or when the internet window is closed.
onvolumechange <audio>, <video> Code to be executed whenever the volume of a video or audio is adjusted.
onwaiting <audio>, <video> Run this script when the media stops temporarily to get more data (like when it's loading) but is supposed to start again.
onwheel All visible elements. Code to execute when the mouse wheel moves up or down on top of an element.
open <details> States that the information must be clear and able to be seen by the user.
optimum <meter> States the best value for the gauge.
pattern <input> Describes a pattern that is used to check if the value of an <input> element is correct.
placeholder <input>, <textarea> Describes a quick tip that tells you what to expect from the element.
poster <video> Indicates a picture to display while the video is being loaded, or until the user presses the play button.
preload <audio>, <video> Tells us if and how the writer wants the sound/video to start playing when the webpage opens.
readonly <input>, <textarea> States that the item can't be changed.
rel <a>, <area>, <form>, <link> Describes how the current document is connected to the linked document.
required <input>, <select>, <textarea> Indicates that you need to complete the item before you can submit the form.
reversed <ol> States that the list needs to be arranged in a way where the numbers go from highest to lowest (9, 8, 7...).
rows <textarea> Tells you how many lines you can see in a text box.
rowspan <td>, <th> Says how many rows a cell in a table should cover.
sandbox <iframe> Adds more rules for the stuff inside an <iframe>
scope <th> Indicates if a header cell is for a column, row, or a bunch of columns or rows.
selected <option> Indicates that a choice should already be chosen when the webpage loads.
shape <area> Describes the form of the region.
size <input>, <select> States how many characters wide an input field should be (for <input>) or how many choices should be visible in a dropdown (for <select>)
sizes <img>, <link>, <source> Indicates how big the linked item is.
span <col>, <colgroup> Indicates how many columns to stretch across.
spellcheck Global Attributes Indicates if the item should undergo a check for correct spelling and grammar or not.
src <audio>, <embed>, <iframe>, <img>, <input>, <script>, <source>, <track>, <video> States the web address of the media file.
srcdoc <iframe> States what should be displayed inside the <iframe> on the page using HTML content.
srclang <track> Indicates the language of the text on the track (necessary if type="subtitles").
srcset <img>, <source> Indicates the web address of the picture to use in various situations.
start <ol> Tells you where an ordered list begins.
step <input> Defines the allowed range of numbers for an input box according to the law.
style Global Attributes Defines a style inside an HTML element using CSS.
tabindex Global Attributes Indicates the order in which you move between different parts of something by pressing the "Tab" key.
target <a>, <area>, <base>, <form> Indicates where to open a linked document or where to send a form.
title Global Attributes Gives more details about something.
translate Global Attributes Indicates if the stuff inside an element should be changed into another language or not.
type <a>, <button>, <embed>, <input>, <link>, <menu>, <object>, <script>, <source>, <style> Explains the category of object.
usemap <img>, <object> Indicates that an image is used as a map on the user's side.
value <button>, <input>, <li>, <option>, <meter>, <progress>, <param> States the worth of the item.t
width <canvas>, <embed>, <iframe>, <img>, <input>, <object>, <video> Defines how wide the object is.
wrap <textarea> Describes how the text inside a text box should be arranged when it's sent through a form.
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