HighlightRegistry: has() method

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

has(name)

Parameters

name: The name of the Highlight object 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

const fooHighlight = new Highlight();
CSS.highlights.set("foo", fooHighlight);

myHighlight.has("foo"); // true
myHighlight.has("bar"); // false

Specifications

ECMAScript® 2027 Language Specification