This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The Selection.isCollapsed read-only property returns a Boolean which indicates whether or not there is currently any text selected; That is to say that the selection's start and end points are at the same position in the content.
Keep in mind that a collapsed selection may still have one (or more, in Gecko) Ranges, so Selection.rangeCount may not be zero. In that scenario, calling a Selection object's getRangeAt() method may return a Range object which is collapsed.
bool = sel.isCollapsed
| Specification | Status | Comment |
|---|---|---|
| HTML Editing APIs The definition of 'Selection.isCollapsed' in that specification. | Editor's Draft | Initial definition |
| Selection API The definition of 'Selection.isCollapsed' 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 | ? | ? | ? |
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https://developer.mozilla.org/en-US/docs/Web/API/Selection/isCollapsed