The element
read-only property of the PerformanceElementTiming
interface returns an Element
which is a pointer to the observed element.
An Element
, or null
if the element is a shadow DOM element.
In this example an <img>
element is being observed by adding the elementtiming
attribute. A PerformanceObserver
is registered to get all performance entries of type "element"
and the buffered
flag is used to access data from before observer creation. The DOM element that is observed is logged to the console.
<img src="image.jpg" alt="a nice image" elementtiming="big-image" />
const observer = new PerformanceObserver((list) => {
list.getEntries().forEach((entry) => {
if (entry.identifier === "big-image") {
console.log(entry.element);
}
});
});
observer.observe({ type: "element", buffered: true });