Highlight: add() method
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The add()
method of the Highlight
interface adds a new Range
object to a highlight, to be styled using the CSS Custom Highlight API.
Highlight
is a Set
-like object, so this is similar to using Set.add()
.
Syntax
js
add(range)
Parameters
Return value
The Highlight
object, with the added range.
Examples
The code snippet below shows how to add two ranges to a new highlight object:
js
const highlight = new Highlight();
const range1 = new Range();
const range2 = new Range();
highlight.add(range1).add(range2);
console.log(highlight.size); // 2
Specifications
Specification |
---|
ECMAScript® 2025 Language Specification # sec-set.prototype.add |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
add |
Legend
Tip: you can click/tap on a cell for more information.
- 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.
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.