Range: isPointInRange() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2017.

The isPointInRange() method of the Range interface determines whether a specified point is within the Range. The point is specified by a reference node and an offset within that node. It is equivalent to calling Range.comparePoint() and checking if the result is 0.

Syntax

isPointInRange(referenceNode, offset)

Parameters

referenceNode: The Node that the offset is relative to.
offset: An integer greater than or equal to zero describing the position inside referenceNode of the point to be checked. If referenceNode is a Node of type Text, Comment, or CDATASection, then offset is the number of characters from the start of referenceNode. For other Node types, offset is the number of child nodes from the start of the referenceNode.

Return value

A boolean.

Examples

const text = new Text("0123456789");

const thisRange = new Range();
thisRange.setStart(text, 1);
thisRange.setEnd(text, 6);

thisRange.isPointInRange(text, 3); // true
thisRange.isPointInRange(text, 0); // false
thisRange.isPointInRange(text, 6); // true
thisRange.isPointInRange(text, 7); // false

Specifications

Specification
DOM # dom-range-ispointinrange