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HTML 5 Event Attributes

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HTML elements can have event attributes that trigger actions in the browser, like starting a JavaScript when a user clicks on an HTML element. Below is a list of attributes that can be inserted into HTML tags to define event actions.

If you want to learn more about programming with these events, you should study our JavaScript tutorial and our DHTML tutorial.


Differences Between HTML 4.01 and HTML 5

New event attributes in HTML 5: onabort, onbeforeunload, oncontextmenu, ondrag, ondragend, ondragenter, ondragleave, ondragover, ondragstart, ondrop, onerror, onmessage, onmousewheel, onresize, onscroll, onunload

HTML 4.01 event attributes which are no longer supported: onreset


Event Attributes

  • 4: indicates if the attribute is defined in HTML 4.01
  • 5: indicates if the attribute is defined in HTML 5
Attribute Value Description 4 5
onabort script  Script to be run at an abort event   5
onbeforeonload script  Script to be run before an element is loaded   5
onblur script  Script to be run when the element loses focus 4 5
onchange script Script to be run when the element changes 4 5
onclick script  Script to be run at a a mouse click 4 5
oncontextmenu script  Script to be run when a context menu is triggered   5
ondblclick script  Script to be run at a mouse doubleclick 4 5
ondrag script  Script to be run as long as an element is being dragged   5
ondragend script  Script to be run at the end of a drag operation   5
ondragenter script  Script to be run when the element has been dragged to a valid drop target   5
ondragleave script  Script to be run when the element leaves a valid drop target   5
ondragover script  Script to be run as long as the element is being dragged over a valid drop target   5
ondragstart script  Script to be run at the start of a drag operation   5
ondrop script  Script to be run when dragged element is being dropped   5
onerror script  Script to be run when an error occur during the loading of the element   5
onfocus script  Script to be run when the element gets focus 4 5
onkeydown script  Script to be run when key is pressed 4 5
onkeypress script  Script to be run when key is pressed and released 4 5
onkeyup script  Script to be run when key is released 4 5
onload script Script to be run when a document loads 4 5
onmessage script  Script to be run when the message event is being triggered   5
onmousedown script  Script to be run when a mouse button is pressed 4 5
onmousemove script  Script to be run when the mouse pointer moves 4 5
onmouseover script Script to be run when the mouse pointer moves over an element 4 5
onmouseout script Script to be run when the mouse pointer moves out of an element 4 5
onmouseup script  Script to be run when a mouse button is released 4 5
onmousewheel script  Script to be run when the mouse wheel is being rotated   5
onreset script  Script to be run when the form is reset.
Not supported.
4  
onresize script  Script to be run when the element is being resized   5
onscroll script  Script to be run when the elements scrollbar is being scrolled   5
onselect script  Script to be run when the element is selected 4 5
onsubmit script Script to be run when the form is submitted 4 5
onunload script Script to be run when a document unloads   5


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