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# HTML5 Events

When a user visit your website, they do things like click on text and images and given links, hover over things etc. These are examples of what JavaScript calls events.

We can write our event handlers in Javascript or vbscript and you can specify these event handlers as a value of event tag attribute. The HTML5 specification defines various event attributes as listed below:

There are following attributes which can be used to trigger any javascript or vbscript code given as value, when there is any event occurs for any HTM5 element.

We would cover element specific events while discussing those elements in detail in subsequent chapters.

Attribute | Value | Description
--- | --- | ---
offline | script | Triggers when the document goes offline
onabort | script | Triggers on an abort event
onafterprint | script | Triggers after the document is printed
onbeforeonload | script | Triggers before the document loads
onbeforeprint | script | Triggers before the document is printed
onblur | script | Triggers when the window loses focus
oncanplay | script | Triggers when media can start play, but might has to stop for buffering
oncanplaythrough | script | Triggers when media can be played to the end, without stopping for buffering
onchange | script | Triggers when an element changes
onclick | script | Triggers on a mouse click
oncontextmenu | script | Triggers when a context menu is triggered
ondblclick | script | Triggers on a mouse double-click
ondrag | script | Triggers when an element is dragged
ondragend | script | Triggers at the end of a drag operation
ondragenter | script | Triggers when an element has been dragged to a valid drop target
ondragleave | script | Triggers when an element leaves a valid drop target
ondragover | script | Triggers when an element is being dragged over a valid drop target
ondragstart | script | Triggers at the start of a drag operation
ondrop | script | Triggers when dragged element is being dropped
ondurationchange | script | Triggers when the length of the media is changed
onemptied | script | Triggers when a media resource element suddenly becomes empty.
onended | script | Triggers when media has reach the end
onerror | script | Triggers when an error occur
onfocus | script | Triggers when the window gets focus
onformchange | script | Triggers when a form changes
onforminput | script | Triggers when a form gets user input
onhaschange | script | Triggers when the document has change
oninput | script | Triggers when an element gets user input
oninvalid | script | Triggers when an element is invalid
onkeydown | script | Triggers when a key is pressed
onkeypress | script | Triggers when a key is pressed and released
onkeyup | script | Triggers when a key is released
onload | script | Triggers when the document loads
onloadeddata | script | Triggers when media data is loaded
onloadedmetadata | script | Triggers when the duration and other media data of a media element is loaded
onloadstart | script | Triggers when the browser starts to load the media data
onmessage | script | Triggers when the message is triggered
onmousedown | script | Triggers when a mouse button is pressed
onmousemove | script | Triggers when the mouse pointer moves
onmouseout | script | Triggers when the mouse pointer moves out of an element
onmouseover | script | Triggers when the mouse pointer moves over an element
onmouseup | script | Triggers when a mouse button is released
onmousewheel | script | Triggers when the mouse wheel is being rotated
onoffline | script | Triggers when the document goes offline
onoine | script | Triggers when the document comes online
ononline | script | Triggers when the document comes online
onpagehide | script | Triggers when the window is hidden
onpageshow | script | Triggers when the window becomes visible
onpause | script | Triggers when media data is paused
onplay | script | Triggers when media data is going to start playing
onplaying | script | Triggers when media data has start playing
onpopstate | script | Triggers when the window's history changes
onprogress | script | Triggers when the browser is fetching the media data
onratechange | script | Triggers when the media data's playing rate has changed
onreadystatechange | script | Triggers when the ready-state changes
onredo | script | Triggers when the document performs a redo
onresize | script | Triggers when the window is resized
onscroll | script | Triggers when an element's scrollbar is being scrolled
onseeked | script | Triggers when a media element's seeking attribute is no longer true, and the seeking has ended
onseeking | script | Triggers when a media element's seeking attribute is true, and the seeking has begun
onselect | script | Triggers when an element is selected
onstalled | script | Triggers when there is an error in fetching media data
onstorage | script | Triggers when a document loads
onsubmit | script | Triggers when a form is submitted
onsuspend | script | Triggers when the browser has been fetching media data, but stopped before the entire media file was fetched
ontimeupdate | script | Triggers when media changes its playing position
onundo | script | Triggers when a document performs an undo
onunload | script | Triggers when the user leaves the document
onvolumechange | script | Triggers when media changes the volume, also when volume is set to "mute"
onwaiting | script | Triggers when media has stopped playing, but is expected to resume

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