Sean Lynch's blog

Dealing with infinite loops with timers in useEffect

December 10, 2018

In a project that I was using useEffect in I needed to setup an interval and a timeout.

The interval was used to occationally check for updates, while the timeout was used for auto play.

The problem turned out to be that it was firing the useEffect any time the component was rerendering, which resulted in more intervals being added. To fix this I passed in that I only wanted it to update based on a certain prop changed like seen at https://reactjs.org/docs/hooks-reference.html#conditionally-firing-an-effect.


Sean Lynch

Written by Sean Lynch who lives and works in Michigan. You should follow him on Twitter