About

navigation is the first point in time of a page load.

This is the trigger of the page load.

It happens when clicking:

• on a anchor (hyperkink)
• on a submit form
• on any element (such as button) that listens to a click and navigate away with one of the window.location interface ¹⁾ method or properties such as location.href, location.assign(url), …

All this navigation action will create a HTTP GET request.

This timed event is used as the start time of the First Contentful Paint (FCP) metrics.