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Highlight: entries() method

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

The entries() method of the Highlight interface returns a new Iterator object that contains an array of [range, range] for each Range object in the Highlight object, in insertion order.

Highlight is a Set-like object, so this is similar to using Set.entries().

Syntax

js

entries()

Return value

A new iterator object that contains an array of [range, range] for each Range object in the given Highlight, in insertion order.

Examples

The code snippet below shows how create a new highlight with two ranges, and then log the ranges by using the iterator returned by the entries() method:

js

const text = new Text("Time is an illusion. Lunchtime doubly so.");

const range1 = document.createRange();
range1.setStart(text, 0);
range1.setEnd(text, 4);

const range2 = document.createRange();
range2.setStart(text, 21);
range2.setEnd(text, 30);

const myHighlight = new Highlight();
myHighlight.add(range1);
myHighlight.add(range2);

const iter = myHighlight.entries();

console.log(iter.next().value); // [Range, Range]
console.log(iter.next().value); // [Range, Range]

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

js

const text = new Text("Time is an illusion. Lunchtime doubly so.");

const range1 = document.createRange();
range1.setStart(text, 0);
range1.setEnd(text, 4);

const range2 = document.createRange();
range2.setStart(text, 21);
range2.setEnd(text, 30);

const highlight = new Highlight();
highlight.add(range1);
highlight.add(range2);

for (const [range] of highlight.entries()) {
  console.log(range.toString());
  // Time
  // Lunchtime
}

Specifications

Specification
ECMAScript Language Specification
# sec-set.prototype.entries

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
entries 105 105 preview No 91 No 105 105 No 72 No 20.0

See also

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Highlight/entries