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.

Examples

Using size

js
const highlight = new Highlight();
highlight.add(range1);
highlight.add(range2);
highlight.add(range3);

console.log(highlight.size); // 3

Specifications

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

Browser compatibility

See also