PerformanceElementTiming: loadTime property

{{APIRef("Performance API")}}{{SeeCompatTable}}

The loadTime read-only property of the {{domxref("PerformanceElementTiming")}} interface always returns 0 for text. For images it returns the time which is the latest between the time the image resource is loaded and the time it is attached to the element.

Value

A {{domxref("DOMHighResTimeStamp")}} with the loadTime of the element. Always 0 for text.

Examples

Logging loadTime

In this example an {{HTMLElement("img")}} element is being observed by adding the elementtiming attribute. A {{domxref("PerformanceObserver")}} is registered to get all performance entries of type "element". The buffered flag is used to access data from before the observer was created. Calling entry.loadTime returns the loadTime of the image element.

const observer = new PerformanceObserver((list) => {
  list.getEntries().forEach((entry) => {
    if (entry.identifier === "big-image") {
      console.log(entry.loadTime);
    }
  });
});
observer.observe({ type: "element", buffered: true });

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}