Range.commonAncestorContainer

The Range.commonAncestorContainer read-only property returns the deepest — or furthest down the document tree — Node that contains both boundary points of the range. This means that if Range.startContainer and Range.endContainer both refer to the same node, this node is the commonAncestorContainer.

Since a Range need not be continuous, and may also partially select nodes, this is a convenient way to find a Node which encloses a Range.

This property is read-only. To change the ancestor container of a Node, consider using the various methods to set the start and end positions of the Range.

Syntax

rangeAncestor = range.commonAncestorContainer;

Example

var range = document.createRange();

range.setStart(startNode,startOffset);
range.setEnd(endNode,endOffset);
rangeAncestor = range.commonAncestorContainer;

Specifications

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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes499 Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes4 Yes Yes ?

See also

Document Tags and Contributors

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Last updated by: fscholz,