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The Range.setStartBefore() method sets the start position of a Range relative to another Node. The parent Node of the start of the Range will be the same as that for the referenceNode.

Syntax

range.setStartBefore(referenceNode);

Parameters

referenceNode
The Node before which the Range should start.

Example

var range = document.createRange();
var referenceNode = document.getElementsByTagName("div").item(0);

range.setStartBefore(referenceNode);

Specifications

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

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最終更新者: fscholz,