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An event handler for the load event of a window.
Syntax
window.onload = funcRef;
funcRefis the handler function to be called when the window'sloadevent fires.
Examples
window.onload = function() {
init();
doSomethingElse();
};
<!doctype html>
<html>
<head>
<title>onload test</title>
<script>
function load() {
console.log("load event detected!");
}
window.onload = load;
</script>
</head>
<body>
<p>The load event fires when the document has finished loading!</p>
</body>
</html>
Notes
The load event fires at the end of the document loading process. At this point, all of the objects in the document are in the DOM, and all the images, scripts, links and sub-frames have finished loading.
There are also Gecko-Specific DOM Events like DOMContentLoaded and DOMFrameContentLoaded (which can be handled using EventTarget.addEventListener()) which are fired after the DOM for the page has been constructed, but do not wait for other resources to finish loading.
Specifications
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard The definition of 'onload' in that specification. |
Living Standard | Initial definition |
See also
DOMContentLoadedevent in Listening to events: Simple DOM events