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ReadableStreamDefaultReader: closed property

The closed read-only property of the ReadableStreamDefaultReader interface returns a Promise that fulfills when the stream closes, or rejects if the stream throws an error or the reader's lock is released. This property enables you to write code that responds to an end to the streaming process.

Value

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.

js

reader.closed.then(() => {
  console.log("reader closed");
});

Specifications

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
closed 78 79 65 No 65 ≤13.1 78 78 65 56 ≤13.4 12.0

See also

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https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamDefaultReader/closed