ReadableStreamBYOBReader: closed property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Note: This feature is available inWeb Workers.

Theclosed read-only property of theReadableStreamBYOBReader interface returns aPromise 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

APromise.

Examples

The code below shows the pattern for handling the closed/error state of a BYOBReader.

const reader = stream.getReader({ mode: "byob" });reader.closed  .then(() => {    // Resolved - code to handle stream closing  })  .catch(() => {    // Rejected - code to handle error  });