interval & intervalCap question

[AlvMF1]

Hey everyone!

Here's what I'm trying to accomplish. Please let me know if that's possible with this cool lib:

I need a queue to run 5 concurrent tasks. Let's say I add 10. I'd like to see 5 tasks running, a delay, another 5.

Is it possible to do it with interval and/or intervalCap? I couldn't figure it out just by reading the readme.

Thanks!

[sindresorhus]

// @Rafael09ED

[szmarczak]

What are you trying to achieve? 5 tasks then delay (delay starts when all the tasks are completed) or these 5 tasks must be completed in a given time?

[AlvMF1]

added 4 tasks
starting 2 tasks...
task 1 finished
task 2 finished
waiting 5 secs...
starting 2 tasks...
task 3 finished
task 4 finished
all done!

😄

[Rafael09ED]

If you wanted to run at max 2 tasks every 5 seconds you can use interval = 5000 and intervalCap = 2 however I don't think that's what you are looking for. The output for the second example you gave would then be:

added 4 tasks
starting 2 tasks...
start of waiting 5 secs...
task 1 finished
task 2 finished

end of waiting 5 secs... (next two tasks may run now) (this can also happen before task 1 or 2 ends)
starting 2 tasks...
task 3 finished
task 4 finished
all done!

For the exact behavior you have described where it waits five seconds after all have finished, I would look into using the .onIdle() promise or Promise.all() with a timeout for 5 seconds that then adds the next set of promises you want to run.

[AlvMF1]

Ok. I know Promise.all() is a possibility. Just wanted to make sure if it could be done with the queue itself.
Thanks anyways!