Skip to main content

UseEffect

useEffect hook is used to perform side effects in function components. Side effects might include data fetching, subscriptions, or manually changing the DOM.

use effect dependencies​

  • a specific value is given

    In case of a specific value is given, useEffect function will only run when that values changes.

  • empty array

    In case of empty array, useEffect function will only run once.

  • no value

    useEffect function will run every single time.