Window: hashchange event

BaselineWidely available

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

Thehashchange 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 usinghistory.pushState() orhistory.replaceState().

Syntax

Use the event name in methods likeaddEventListener(), or set an event handler property.

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

Event type

AHashChangeEvent. Inherits fromEvent.

Event properties

HashChangeEvent.newURLRead only: A string representing the new URL the window is navigating to.
HashChangeEvent.oldURLRead only: A string representing the previous URL from which the window was navigated.

Event handler aliases

In addition to theWindow interface, the event handler propertyonhashchange is also available on the following targets:

Examples

You can use thehashchange event in anaddEventListener method:

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

Or use theonhashchange event handler property:

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