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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The ReadableByteStream interface of the the Fetch API represents a readable stream of byte data.


Creates a reader of the type specified by the mode option and locks the stream to the new reader. While the stream is locked, no other reader can be acquired until this one is released.
Cancels the stream, signaling a loss of interest in the stream by a consumer. The supplied reason argument will be given to the underlying source, which may or may not use it.


Specification Status Comment
The definition of 'ReadableStream' in that specification.
Living Standard Initial definition

Browser Compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support


? ?


Feature Android Android Webview Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support 52.0 ? ? ? 39 ? 52.0

Document Tags and Contributors

 Contributors to this page: jpmedley
 Last updated by: jpmedley,