[scanr]

> More extensive standard library functions for (async) iteration

Great news! I wrote an open source library called axax that adds a number of utility methods to async iterators - map, filter etc.

I think having them as part of the language would be awesome.

Standardising async cancellation would be neat too if Deno wants a challenge....

[lucacasonato]

I think async cancellation is pretty well covered by `AbortSignal` now. It is a Web API (not JS), but it is supported in all major runtimes.