LargestContentfulPaint: size property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The size
read-only property of the LargestContentfulPaint
interface returns the intrinsic size of the element that is the largest contentful paint.
The size
of the element is the width
times height
of the rectangle
that this element creates on the screen.
Value
An integer representing the width times height of the element.
Examples
Logging the size of the largest contentful paint element
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.size);
});
observer.observe({ type: "largest-contentful-paint", buffered: true });
Specifications
Specification |
---|
Largest Contentful Paint # dom-largestcontentfulpaint-size |
Browser compatibility
BCD tables only load in the browser