Window: hashchange event

{{APIRef}}

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 {{domxref("history.pushState()")}} or {{domxref("history.replaceState()")}}.

Syntax

Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.

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

onhashchange = (event) => { }

Event type

A {{domxref("HashChangeEvent")}}. Inherits from {{domxref("Event")}}.

{{InheritanceDiagram("HashChangeEvent")}}

Event properties

• {{domxref("HashChangeEvent.newURL")}} {{ReadOnlyInline}}
  • : A string representing the new URL the window is navigating to.
• {{domxref("HashChangeEvent.oldURL")}} {{ReadOnlyInline}}
  • : 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:

• {{domxref("HTMLBodyElement")}}
• {{domxref("HTMLFrameSetElement")}}
• {{domxref("SVGSVGElement")}}

Examples

You can use the hashchange event in an {{domxref("EventTarget/addEventListener", "addEventListener")}} method:

window.addEventListener("hashchange", () => {
  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;

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("Window/popstate_event", "popstate")}} event