Highlight: has() method
Baseline 2025Newly 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
js
has(range)
Parameters
range-
The
Rangeobject to test for presence in theHighlightobject.
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® 2026 Language Specification # sec-set.prototype.has |