HighlightRegistry: values() method

Limited availability

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

The values() method of the HighlightRegistry interface returns a new Iterator object that contains the values for each Highlight object in the HighlightRegistry object in insertion order.

HighlightRegistry is a Map-like object, so this is similar to using Map.values().

Syntax

js
values()

Return value

A new iterator object containing each Highlight object in the registry, in insertion order.

Examples

The following code snippet shows how to create and register three Highlight objects, and use the iterator returned by the values() method to log the highlights:

js
const fooHighlight = new Highlight();
const barHighlight = new Highlight();
const bazHighlight = new Highlight();

CSS.highlights.set("foo", fooHighlight);
CSS.highlights.set("bar", barHighlight);
CSS.highlights.set("baz", bazHighlight);

const iter = CSS.highlights.values();

console.log(iter.next().value); // Highlight
console.log(iter.next().value); // Highlight
console.log(iter.next().value); // Highlight

The following code example shows how to iterate over the highlights in the registry by using a for...of loop:

js
const fooHighlight = new Highlight();
const barHighlight = new Highlight();
const bazHighlight = new Highlight();

CSS.highlights.set("foo", fooHighlight);
CSS.highlights.set("bar", barHighlight);
CSS.highlights.set("baz", bazHighlight);

for (const highlight of CSS.highlights.values()) {
  console.log(highlight); // Highlight
}

Specifications

Specification
ECMAScript® 2025 Language Specification
# sec-map.prototype.values

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
values

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