Throttle JavaScript function calls, but with queuing (don't discard calls)

Question

How can a function rate-limit its calls? The calls should not be discarded if too frequent, but rather be queued up and spaced out in time, X milliseconds apart. I\'ve looked at

Answer 1

While the snippets offered by others do work (I've built a library based on them), for those who want to use well-supported modules, here are the top choices:

• the most popular rate limiter is limiter
• function-rate-limit has a simple API that works, and good usage stats on npmjs
• valvelet, a newer module, claims to do an even better job by supporting promises, but hasn't gained popularity yet