HighlightRegistry: values() 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 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
values()
Parameters
None.
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:
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:
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® 2026 Language Specification # sec-map.prototype.values |