files/en-us/web/api/navigation/navigateerror_event/index.md
{{APIRef("Navigation API")}}
The navigateerror event of the {{domxref("Navigation")}} interface is fired when a navigation fails.
For example, if the network is down, any {{domxref("Window/fetch", "fetch()")}} method invoked to handle a navigation will fail, and the error will be routed to navigateerror.
Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.
addEventListener("navigateerror", (event) => { })
onnavigateerror = (event) => { }
An {{domxref("ErrorEvent")}}. Inherits from {{domxref("Event")}}.
{{InheritanceDiagram("ErrorEvent")}}
You might deal with a successful navigation by hiding a previously displayed progress indicator, like this:
navigation.addEventListener("navigatesuccess", (event) => {
loadingIndicator.hidden = true;
});
Or you might show an error message on failure:
navigation.addEventListener("navigateerror", (event) => {
loadingIndicator.hidden = true; // also hide indicator
showMessage(`Failed to load page: ${event.message}`);
});
{{Specifications}}
{{Compat}}