HighlightRegistry: 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 HighlightRegistry interface returns a boolean indicating whether or not a Highlight object with the specified name exists in the registry.
HighlightRegistry is a Map-like object, so this is similar to using Map.has().
Syntax
js
has(name)
Parameters
name-
The name of the
Highlightobject to test for presence in the registry.
Return value
Returns true if a highlight with the specified name exists in the registry; otherwise false.
Examples
js
const fooHighlight = new Highlight();
CSS.highlights.set("foo", fooHighlight);
myHighlight.has("foo"); // true
myHighlight.has("bar"); // false
Specifications
| Specification |
|---|
| ECMAScript® 2025 Language Specification # sec-map.prototype.has |
Browser compatibility
| desktop | mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
has | ||||||||||||