PerformanceElementTiming.url

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

The url read-only property of the PerformanceElementTiming interface returns the initial URL of the resource request when the element is an image.

Value

A string which is the initial URL of the resources request for images or 0 for text.

Examples

In this example calling entry.url returns https://example.com/image.jpg.

<img
  src="https://example.com/image.jpg"
  alt="a nice image"
  elementtiming="big-image"
  id="myImage" />
const observer = new PerformanceObserver((list) => {
  list.getEntries().forEach((entry) => {
    if (entry.identifier === "big-image") {
      console.log(entry.url);
    }
  });
});
observer.observe({ entryTypes: ["element"] });

Note: This example uses the PerformanceObserver interface to create a list of performance measurement events. In our case we observe the PerformanceEntry.entrytype element in order to use the PerformanceElementTiming interface.

Specifications

Specification
Element Timing API
# ref-for-dom-performanceelementtiming-url

Browser compatibility

BCD tables only load in the browser