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How To Fix Error - "Maximum Update Depth Exceeded" in Javascript or ReactJs ?


In this post, we will explore - How To Fix Error - "Maximum Update Depth Exceeded" in Javascript or ReactJs. Error sample


Uncaught Error: Maximum update depth exceeded. 
This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate.
React limits the number of nested updates to prevent infinite loops.
Basically React might limit the no. of nested updates to prevent infinite loops. This can happen if a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate. In such a case, React would limit the number of nested updates to prevent infinite loops.  

Primitive Checks:

  • Does you code has any sort of function call that happens in loop indefinitely ? Generally functions has to be called only when triggered or actioned upon by the user.
  • Does this issue happen on initial render or after you click or type something ?
 

  • Make sure you are not calling setState within function body. This would cause the component to setState everytime it gets rendered. That would then lead to further render and another render and the process will carry on indefinitely.
That might seriously cause the update depth error. Ideally you should call setState from some useEffect hook or on events.  

  • If you have a component that gets updated again and again with no stop, you should check that. May be some state is being prevented from getting an update when it is already true.
 

  • Check the setState in your rendering. You might also try to pass prevProps and/or prevState as parameter(s).
 

  • If you are doing some data processing, you might have to convert the types of the data to data type of the state.

setDate(res.SOMEDATA.date)

setDate(new Date(res.SOMEDATA.date))
 

  • Also if you are using string - try to disallow null or undefined values.
 

Solution 1:

  • Use the useEffect hook cautiously. Check how it is being used. If the useEffect hook modifies something which then in turn causes the effect to re-run, then it will be again an infinite loop possibility.
You might use callback function in the state setter instead.  

Solution 2:

  • Use to pass a Reference to the state-setter function. Do not use Call to such functions.
This will avoid re-rendering and the infinite loop possibility.   Hope this helps to fix the issue.  

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