This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The Selection.focusOffset read-only property returns the number of characters that the selection's focus is offset within the Selection.focusNode.
This number is zero-based. If the selection ends with the first character in the Selection.focusNode, 0 is returned.
Syntax
offset = sel.focusOffset
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Editing APIs The definition of 'Selection.focusOffset' in that specification. |
Editor's Draft | Initial definition |
| Selection API The definition of 'Selection.focusOffset' in that specification. |
Working Draft | Current |
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.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome Full support Yes | Edge Full support Yes | Firefox Full support Yes | IE ? | Opera Full support Yes | Safari ? | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS ? | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
See also
Selection, the interface it belongs to.