LargestContentfulPaint: url property

Baseline 2025

Newly available

Since December 2025, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The url read-only property of the LargestContentfulPaint interface returns the request URL of the element, if the element is an image.

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.

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