HighlightRegistry: has() method

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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 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

js

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

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

Specifications

Specification
ECMAScript Language Specification
# sec-map.prototype.has

Browser compatibility

BCD tables only load in the browser

See also