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onload Event

DOM Events Event Object


Execute a JavaScript immediately after a page has been loaded:

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More “Try it Yourself” examples below.

Definition and Usage

The onload event occurs when an object has been loaded.

onload is most often used within the element to execute a script once a web page has completely loaded all content (including images, script files, CSS files, etc.).

The onload event can be used to check the visitor’s browser type and browser version, and load the proper version of the web page based on the information.

The onload event can also be used to deal with cookies (see “More Examples” below).

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Browser Support

onload Yes Yes Yes Yes Yes


In JavaScript, using the addEventListener() method:

object.addEventListener(“load”, myScript);

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Note: The addEventListener() method is not supported in Internet Explorer 8 and earlier versions.

Technical Details

Bubbles: No
Cancelable: No
Event type: UiEvent if generated from a user interface, Event otherwise.
Supported HTML tags: , ,