LargestContentfulPaint: id property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The id read-only property of the LargestContentfulPaint interface returns the ID of the element that is the largest contentful paint.

Value

A string containing the ID of the element, or the empty string if there is no such ID.

Examples

Logging the largest contentful paint element ID

This example uses a PerformanceObserver notifying of new largest-contentful-paint performance entries as they are recorded in the browser's performance timeline. The buffered option is used to access entries from before the observer creation.

js
const observer = new PerformanceObserver((list) => {
  const entries = list.getEntries();
  const lastEntry = entries[entries.length - 1]; // Use the latest LCP candidate
  console.log(lastEntry.id);
});
observer.observe({ type: "largest-contentful-paint", buffered: true });

Specifications

Specification
Largest Contentful Paint
# dom-largestcontentfulpaint-id

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
id

Legend

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Full support
Full support
No support
No support