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NavigateEvent: canIntercept property

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The canIntercept read-only property of the NavigateEvent interface returns true if the navigation can be intercepted and have its URL rewritten, or false otherwise

There are several rules around when a navigation can be intercepted. For example:

You can't intercept cross-origin navigations.
You can intercept http or https URLs if only the path, query, and fragment portions of the new URL differ from the current URL.
You can intercept file URLs if only the query and fragment portions of the new URL differ.
For other URL types you can intercept the navigation if only the fragment portion differs.

See the spec for more explanation on when a Document can have its URL rewritten, including a table of examples.

Value

A boolean value—true if the navigation can be intercepted, false if not.

Examples

navigation.addEventListener("navigate", (event) => {
  // Some navigations, e.g. cross-origin navigations, we
  // cannot intercept. Let the browser handle those normally.
  if (!event.canIntercept) {
    return;
  }

  // Don't intercept fragment navigations or downloads.
  if (event.hashChange || event.downloadRequest !== null) {
    return;
  }

  event.intercept({
    handler() {
      if (event.formData) {
        processFormDataAndUpdateUI(event.formData, event.signal);
      } else {
        doSinglePageAppNav(event.destination, event.signal);
      }
    },
  });
});

Specifications

Specification
HTML Standard # dom-navigateevent-canintercept-dev

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`canIntercept`	105	105	No	No	No	No	105	105	No	72	No	20.0

Value

Examples

Specifications

Browser compatibility

See also