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Highlight: has() method

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 has() method of the Highlight interface returns a boolean indicating whether a Range object exists in a Highlight object or not.

Highlight is a Set-like object, so this is similar to using Set.has().

Syntax

has(range)

Parameters

range: The Range object to test for presence in the Highlight object.

Return value

Returns true if the specified range exists in the Highlight object; otherwise false.

Examples

The code snippet below creates two ranges, and a highlight object that contains one of them. The code then uses the has() method to check whether each range exists in the highlight:

const range1 = new Range();
const range2 = new Range();
const myHighlight = new Highlight(range1);

myHighlight.has(range1); // true
myHighlight.has(range2); // false

Specifications

Specification
ECMAScript® 2026 Language Specification> # sec-set.prototype.has>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`has`	105	105	140	91	17.2	105	140	72	17.2	20.0	105	17.2