JavaScript onunload Event
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JavaScript onunload Event
The onunload event occurs when the document/page or a child resource is being unloaded.
Note: Unlike onpagehide event, the onunload event will NOT cache the page to be replaced by another page.
onunload Event as Attribute
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body onunload="myFunction()">
<script>
function myFunction(){
console.log("onunload is Triggered");
}
</script>
</body>
</html>
Syntax
<body onunload = "JavaScript">
As Property
window.onunload = function(){
// code
};
Using Event Listener
window.addEventListener("unload" , myScript);
onunload Event as Property
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
function myFunction(){
console.log("onunload is Triggered");
}
window.onunload = myFunction;
</script>
</body>
</html>
Using addEventListener() Method
Note: The addEventListener() method is not supported in Internet Explorer 8 and below.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
function myFunction(){
console.log("onunload is Triggered");
}
window.addEventListener("unload", myFunction);
</script>
</body>
</html>
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