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/DOM

Range.setStart

The Range.setStart() method sets the start position of a Range.

If the startNode is a Node of type Text, Comment, or CDATASection, then startOffset is the number of characters from the start of startNode. For other Node types, startOffset is the number of child nodes between the start of the startNode.

Setting the start point below (lower in the document) the end point will result in a collapsed range with the start and end points both set to the specified start position.

Syntax

range.setStart(startNode, startOffset);

Parameters

startNode: The Node where the Range should start.
startOffset: An integer greater than or equal to zero representing the offset for the start of the Range from the start of startNode.

Example

var range = document.createRange();
var startNode = document.getElementsByTagName("p").item(2);
var startOffset = 0;
range.setStart(startNode,startOffset);

Specifications

Specification	Status	Comment
DOM The definition of 'Range.setStart()' in that specification.	Living Standard	No change.
Document Object Model (DOM) Level 2 Traversal and Range Specification The definition of 'Range.setStart()' in that specification.	Obsolete	Initial specification.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	Yes	Yes	4	9	9	Yes