Window: hashchange event

Baseline

Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

See full compatibility
Learn more

The hashchange event is fired when the fragment identifier of the URL has changed (the part of the URL beginning with and following the # symbol).

This event does not fire when the hash is modified using history.pushState() or history.replaceState().

Syntax

Use the event name in addEventListener():

addEventListener("hashchange", (event) => { })

Alternatively, assign to the event handler property of the interface:

onhashchange = (event) => { }

Event type

A HashChangeEvent. Inherits from Event.

Event handler aliases

In addition to the Window interface, the event handler property onhashchange is also available on the following targets:

Examples

You can use the hashchange event in an addEventListener method:

window.addEventListener("hashchange", () => {
  console.log("The hash has changed!");
});

Or use the onhashchange event handler property (but note that this replaces other event listeners added using onhashchange, if any):

function locationHashChanged() {
  if (location.hash === "#cool-feature") {
    console.log("You're visiting a cool feature!");
  }
}

window.onhashchange = locationHashChanged;