Window: hashchange event

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).


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

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

Event type

Event properties

HashChangeEvent.newURL Read only

A string representing the new URL the window is navigating to.

HashChangeEvent.oldURL Read only

A string representing the previous URL from which the window was navigated.

Event handler aliases

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


You can use the hashchange event in an addEventListener method:

  () => {
    console.log("The hash has changed!");

Or use the onhashchange event handler property:

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

window.onhashchange = locationHashChanged;


HTML Standard
# event-hashchange
HTML Standard
# handler-window-onhashchange

Browser compatibility

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See also