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.		 Recommendation Initial specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 1.0 (1.7 or earlier) 9.0 9.0 (Yes)
Parameter optional (Yes) 25 (25) Not supported[1] 15.0 (Yes)
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) 1.0 (1.0) 9.0 9.0 (Yes)
Parameter optional (Yes) 25 (25) Not supported[1] 15.0 (Yes)

[1] Optional but defaults to true.

See also

Document Tags and Contributors

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 Contributors to this page: Sebastianz, teoli, fscholz, afreen, shubham.hatwar, Sheppy, ethertank, SkyLined, Gor1
 Last updated by: Sebastianz,