Mid From PDF React React.js

How do you avoid infinite loops with useEffect?

Infinite loops in useEffect occur when the effect continually triggers itself because the

dependency array includes values that change as a result of the effect itself.

Common cause:

If a value inside useEffect is being updated, and it's in the dependency array, React will

keep rerunning the effect.

How to avoid:

  • Use an empty dependency array ([]) if the effect should run only once.
  • Be selective with dependencies to avoid unnecessary re-renders.

Example:

useEffect(() => {

// Perform API call or other side effects

fetchData();

}, []); // No dependencies, effect runs only once

If the dependency list has state values or props that change inside the effect, React will

rerun it every time those values change. Be mindful of that!

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