Highlight: has() method

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used 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

js
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:

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

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

Specifications

Specification
ECMAScript® 2025 Language Specification
# sec-set.prototype.has

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
has

Legend

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Full support
Full support
In development. Supported in a pre-release version.
In development. Supported in a pre-release version.
No support
No support
See implementation notes.

See also