The locked read-only property of the WritableStream interface returns a boolean indicating whether the WritableStream is locked to a writer.
WritableStream.locked
Value
A boolean value indicating whether or not the writable stream is locked.
Examples
const writableStream = new WritableStream({ write(chunk) { ... }, close() { ... }, abort(err) { ... } }, queuingStrategy); ... const writer = writableStream.getWriter(); writableStream.locked // should return true, as the stream has been locked to a writer
Specifications
| Specification |
|---|
| Streams Standard # ref-for-ws-locked② |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
locked |
59
|
16
|
100
99-100
|
No
|
47
|
14.1
|
59
|
59
|
100
|
44
|
14.5
|
7.0
|
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https://developer.mozilla.org/en-US/docs/Web/API/WritableStream/locked
