Which of the following marks the completion of a page load?

The completion of a page load is marked by the load event end. This event signifies that the entire page, including all of its resources such as images, scripts, and stylesheets, has been fully loaded. Essentially, it indicates that everything needed for the page to function as intended has been received, and the user can interact with the fully rendered content.

The load event end occurs after all critical resources have been downloaded and executed, providing an accurate measure of when a page is considered completely accessible to users. Therefore, this timing is crucial for understanding the user experience related to page load performance.

In contrast, metrics such as time to first byte indicate how quickly the server responds to a request, while DOM content loaded marks when the HTML is fully loaded and parsed but before images and other resources may be loaded. User action duration typically pertains to how long it takes to complete a specific user action rather than the overall loading of the page. This understanding helps clarify the distinct phases in page loading and user experience measurement.