JavaScript onhashchange Event
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JavaScript onhashchange Event
The onhashchange event occurs when the current URL changes to target a specific section within the page.
onhashchange Event as Attribute
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body onhashchange="myFunction()">
<h3 id="html">Learn HTML</h3>
<h3 id="css">Learn CSS</h3>
<h3 id="javascript">Learn Javascript</h3>
<h3 id="jquery">Learn Jquery</h3>
<h3 id="ajax">Learn AJAX</h3>
<a href="#css">Move to CSS</a>
<a href="#javascript">Move to Javascript</a>
<a href="#html">Move to HTML</a>
<script>
function myFunction(){
alert("oldURL: "+event.oldURL+"\n\nnewURL: "+event.newURL);
}
</script>
</body>
</html>
Syntax
As Attribute
<element onhashchange = "JavaScript">
As Property
object.onhashchange = function(){
// code
};
Using Event Listener
window.addEventListener("hashchange" , myScript);
onhashchange Event as Property
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<h3 id="html">Learn HTML</h3>
<h3 id="css">Learn CSS</h3>
<h3 id="javascript">Learn Javascript</h3>
<h3 id="jquery">Learn Jquery</h3>
<h3 id="ajax">Learn AJAX</h3>
<a href="#css">Move to CSS</a>
<a href="#javascript">Move to Javascript</a>
<a href="#html">Move to HTML</a>
<script>
var x = document.getElementsByTagName("body")[0];
function myFunction(){
alert("oldURL: "+event.oldURL+"\n\nnewURL: "+event.newURL);
}
x.onhashchange = 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>
<h3 id="html">Learn HTML</h3>
<h3 id="css">Learn CSS</h3>
<h3 id="javascript">Learn Javascript</h3>
<h3 id="jquery">Learn Jquery</h3>
<h3 id="ajax">Learn AJAX</h3>
<a href="#css">Move to CSS</a>
<a href="#javascript">Move to Javascript</a>
<a href="#html">Move to HTML</a>
<script>
function myFunction(){
alert("oldURL: "+event.oldURL+"\n\nnewURL: "+event.newURL);
}
window.addEventListener("hashchange", myFunction);
</script>
</body>
</html>
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