| CARVIEW |
Select Language
HTTP/2 200
x-guploader-uploadid: AAwnv3LQzM8Xs5RZvHedd4zsSv-T1IAlQ4Y6ohfcwlW1xyKsMxgW0WtkvU07r6pP5n7wD2yX9P2d9M4
x-goog-generation: 1760058347137098
x-goog-metageneration: 1
x-goog-stored-content-encoding: identity
x-goog-stored-content-length: 135994
x-goog-meta-goog-reserved-file-mtime: 1760056851
x-goog-hash: crc32c=qJ3eWQ==, md5=DAKHqMNQrdT9ehD473+2tQ==
x-goog-storage-class: STANDARD
accept-ranges: none
expires: Sat, 11 Oct 2025 22:18:27 GMT
cache-control: public, max-age=3600
last-modified: Fri, 10 Oct 2025 01:05:47 GMT
etag: W/"0c0287a8c350add4fd7a10f8ef7fb6b5"
content-type: text/html
age: 0
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
alt-svc: clear
referrer-policy: strict-origin-when-cross-origin
x-content-type-options: nosniff
strict-transport-security: max-age=63072000
content-security-policy: default-src 'self'; script-src 'report-sample' 'self' 'wasm-unsafe-eval' https://www.google-analytics.com/analytics.js https://www.googletagmanager.com/gtag/js assets.codepen.io production-assets.codepen.io https://js.stripe.com 'sha256-XNBp89FG76amD8BqrJzyflxOF9PaWPqPqvJfKZPCv7M=' 'sha256-YCNoU9DNiinACbd8n6UPyB/8vj0kXvhkOni9/06SuYw=' 'sha256-PZjP7OR6mBEtnvXIZfCZ5PuOlxoDF1LDZL8aj8c42rw='; script-src-elem 'report-sample' 'self' 'wasm-unsafe-eval' https://www.google-analytics.com/analytics.js https://www.googletagmanager.com/gtag/js assets.codepen.io production-assets.codepen.io https://js.stripe.com 'sha256-XNBp89FG76amD8BqrJzyflxOF9PaWPqPqvJfKZPCv7M=' 'sha256-YCNoU9DNiinACbd8n6UPyB/8vj0kXvhkOni9/06SuYw=' 'sha256-PZjP7OR6mBEtnvXIZfCZ5PuOlxoDF1LDZL8aj8c42rw='; style-src 'report-sample' 'self' 'unsafe-inline'; object-src 'none'; base-uri 'self'; connect-src 'self' developer.allizom.org bcd.developer.allizom.org bcd.developer.mozilla.org updates.developer.allizom.org updates.developer.mozilla.org https://*.google-analytics.com https://*.analytics.google.com https://*.googletagmanager.com https://incoming.telemetry.mozilla.org https://observatory-api.mdn.allizom.net https://observatory-api.mdn.mozilla.net https://api.github.com/search/issues stats.g.doubleclick.net https://api.stripe.com; font-src 'self'; frame-src 'self' interactive-examples.mdn.mozilla.net interactive-examples.mdn.allizom.net mdn.github.io live-samples.mdn.mozilla.net live-samples.mdn.allizom.net *.mdnplay.dev *.mdnyalp.dev *.play.test.mdn.allizom.net https://v2.scrimba.com https://scrimba.com jsfiddle.net www.youtube-nocookie.com codepen.io survey.alchemer.com https://js.stripe.com; img-src 'self' data: *.githubusercontent.com *.googleusercontent.com *.gravatar.com mozillausercontent.com firefoxusercontent.com profile.stage.mozaws.net profile.accounts.firefox.com developer.mozilla.org mdn.dev interactive-examples.mdn.mozilla.net interactive-examples.mdn.allizom.net wikipedia.org upload.wikimedia.org https://mdn.github.io/shared-assets/ https://mdn.dev/ https://*.google-analytics.com https://*.googletagmanager.com www.gstatic.com; manifest-src 'self'; media-src 'self' archive.org videos.cdn.mozilla.net https://mdn.github.io/shared-assets/; child-src 'self'; worker-src 'self';
x-frame-options: DENY
origin-trial: AxVILwizhbMjxFeHOn1P3R8niO1RJY/smaK4B4d1rLzc1gTaxtXMSaTi+FoigYgCw40uFRDwFcEAeqDR+vVLOW4AAABfeyJvcmlnaW4iOiJodHRwczovL2RldmVsb3Blci5tb3ppbGxhLm9yZyIsImZlYXR1cmUiOiJQcml2YXRlQXR0cmlidXRpb25WMiIsImV4cGlyeSI6MTc0MjA3OTYwMH0=
x-cloud-trace-context: a58f628248374d8b58fc6024bd1845b9
date: Sat, 11 Oct 2025 21:18:27 GMT
server: Google Frontend
via: 1.1 google
vary: Accept-Encoding
content-encoding: gzip
x-cache: miss
ReadableStreamBYOBReader: closed property - Web APIs | MDN
Toggle sidebar
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 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.
js
const reader = stream.getReader({ mode: "byob" });
reader.closed
.then(() => {
// Resolved - code to handle stream closing
})
.catch(() => {
// Rejected - code to handle error
});
Specifications
| Specification |
|---|
| Streams # ref-for-generic-reader-closed② |
Browser compatibility
Loading…
See also
ReadableStreamBYOBReader()constructor- Using readable byte stream