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.
Syntax
startRangeOffset = range.startOffset;
Example
var range = document.createRange(); range.setStart(startNode,startOffset); range.setEnd(endNode,endOffset); var startRangeOffset = range.startOffset;
Specifications
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. |
Obsolete | Initial specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
startOffset | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 4 | IE Full support 9 | Opera Full support 9 | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support