The closed read-only property of the ReadableStreamDefaultReader interface returns a promise that fulfills if the stream becomes closed or the reader's lock is released, or rejects if the stream errors.
Syntax
var closed = readableStreamDefaultReader.closed;
Value
A Promise.
Examples
In this snippet, a previously-created reader is queried to see if the stream has been closed. When it is closed, the promise fulfills and the message is logged to the console.
reader.closed.then(() => {
console.log('reader closed');
})Specifications
| Specification | Status | Comment |
| StreamsThe definition of 'closed' in that specification. | Living Standard | Initial definition. |
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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
Chrome
? |
Edge
? |
Firefox Full support 65 Full support 65 Full support 57 Disabled' From version 57: this feature is behind the |
IE
No support No |
Opera
? |
Safari
? |
WebView Android
? |
Chrome Android
? |
Firefox Android Full support 65 Full support 65 Full support 57 Disabled' From version 57: this feature is behind the |
Opera Android
? |
Safari iOS
? |
Samsung Internet Android
? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.'
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.'
- User must explicitly enable this feature.
ReadableStreamDefaultReader.closed by Mozilla Contributors is licensed under CC-BY-SA 2.5.
