JS.14.06 Mid-level

sleep, timeout, and setInterval via setTimeout

Comes up in: Coding

This concept is being written. It gets the full five steps — explanation, predict, interview angle, practice with tests, and review cards. Here is exactly what it will cover, so you can study it elsewhere in the meantime.

What it covers

abortable sleep
withTimeout(promise, ms)
drift-corrected interval
mySetInterval/myClearInterval

Words you will know

timer drift

What you will practise

implement with fake timers in tests

Interview questions this answers

Implement sleep that can be aborted.
Implement setInterval using setTimeout.