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Showing content from https://developer.cdn.mozilla.net/en-US/docs/Web/API/ReadableStreamBYOBReader/closed below:

ReadableStreamBYOBReader: closed property - Web APIs

ReadableStreamBYOBReader: closed property

Limited availability

Note: This feature is available in Web Workers.

The closed read-only property of the ReadableStreamBYOBReader 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

A Promise.

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
  });
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