Highlight: size property

Baseline 2025

Newly available

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

The size property returns the number of Range objects in a Highlight object.

Value

The value of size is a read-only integer representing how many entries the highlight object has.

const highlight = new Highlight();
highlight.add(range1);
highlight.add(range2);
highlight.add(range3);
console.log(highlight.size); // 3

Specification
ECMAScript® 2026 Language Specification # sec-get-set.prototype.size

This page was last modified on ⁨Dec 2, 2023⁩ by MDN contributors.