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.
range.setStartBefore(referenceNode);
var range = document.createRange();
var referenceNode = document.getElementsByTagName("div").item(0);
range.setStartBefore(referenceNode);
| 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. |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 1.0 (1.7 or earlier) | 9.0 | 9.0 | (Yes) |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 1.0 (1.0) | 9.0 | 9.0 | (Yes) |
© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Range/setStartBefore