The Range.startOffset
read-only property returns a number representing where in the startContainer
the Range
starts.
If the startContainer
is a Node
of type Text
, Comment
, or CDATASection
, then the offset is the number of characters from the start of the startContainer
to the boundary point of the Range
. For other Node
types, the startOffset
is the number of child nodes between the start of the startContainer
and the boundary point of the Range
.
To change the startOffset
of a Range
, use the Range.setStart
method.
startRangeOffset = range.startOffset;
var range = document.createRange(); range.setStart(startNode,startOffset); range.setEnd(endNode,endOffset); var startRangeOffset = range.startOffset;
Specification | Status | Comment |
---|---|---|
DOM The definition of 'Range.startOffset' in that specification. | Living Standard | No change. |
Document Object Model (DOM) Level 2 Traversal and Range Specification The definition of 'Range.startOffset' in that specification. | Recommendation | 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) |
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Range/startOffset