Range: startOffset property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2017.
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.
Value
A number.
Examples
js
const range = document.createRange();
range.setStart(startNode, startOffset);
range.setEnd(endNode, endOffset);
const startRangeOffset = range.startOffset;
Specifications
| Specification |
|---|
| DOM Standard # ref-for-dom-range-startoffset① |
Browser compatibility
BCD tables only load in the browser