The clear() method of the Highlight interface removes all the AbstractRange objects from a Highlight object.
Highlight is a Set-like object, so this is similar to using Set.clear().
clear()None.
None (undefined).
The code snippet below shows how to create a new highlight with two ranges, and then clear it:
const highlight = new Highlight(range1, range2);
console.log(highlight.size); // 2
highlight.clear();
console.log(highlight.size); // 0