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.
offset = sel.focusOffset
| 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 |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | (Yes) | ? | ? | ? |
| Feature | Android | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | (Yes) | 1.0 | ? | ? | ? |
Selection, the interface it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/API/Selection/focusOffset