1525852 - Implement ReadableStream getIterator() and [@@asyncIterator] methods

Status: RESOLVED DUPLICATE of bug 1734244

(Core :: JavaScript Engine, enhancement, P3)

Description

[ricea]

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36

Steps to reproduce:

Attempted to iterate over a ReadableStream:

for await (const chunk of response.body) {
console.log(chunk);
}

Actual results:

Didn't work due to not being implemented.

Expected results:

Should work because it is implemented.

Standard change: https://github.com/whatwg/streams/pull/980
Tests: https://github.com/web-platform-tests/wpt/pull/15097

Comment 1

[ricea]

Issue 1496770 (import of the test changes) is related.

Comment 2

[ricea]

Note that https://github.com/whatwg/streams/pull/1035 will rename getIterator() to values().

Comment 3

[Joaquín Serna]

Any updates regarding this?

Comment 4

[Jeff Walden [:Waldo]]

No particular updates.

I'm the most recent person to do streams stuff, and I'm currently finishing up bug 1474543, which is basically done but is blocked by bug 1502355. However, I was part of recent layoffs, and my free-time projects are unlikely to include this work. (I prefer implementing stuff that offers new functionality -- syntactic sugar is nice, don't get me wrong, but making the impossible possible is more valuable than something you can already achieve.)

I would suggest you (keep?) writing your own implementation, that can use this if it exists or that reimplements it if necessary.