The Range.collapse() method collapses the Range to one of its boundary points.

A collapsed Range is empty, containing no content, specifying a single-point in a DOM tree. To determine if a Range is already collapsed, see the Range.collapsed property.

Syntax

range.collapse(toStart);

Parameters

toStart Optional
A boolean value: true collapses the Range to its start, false to its end. If omitted, it defaults to false .

Example

var range = document.createRange();

referenceNode = document.getElementsByTagName("div").item(0);
range.selectNode(referenceNode);
range.collapse(true);

Specifications

Specification Status Comment
DOM
The definition of 'Range.collapse()' in that specification.
Living Standard The parameter is now optional and default to false.
Document Object Model (DOM) Level 2 Traversal and Range Specification
The definition of 'Range.collapse()' in that specification.
Obsolete Initial specification.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes499 Yes
toStart parameter optional Yes ?25 No115 Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes4 Yes Yes ?
toStart parameter optional Yes Yes ?2515 Yes ?

1. Optional but defaults to true.

See also

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Last updated by: fscholz,