Join egghead, unlock knowledge.

Want more egghead?

This lesson is for members. Join us? Get access to all 3,000+ tutorials + a community with expert developers around the world.

Unlock This Lesson
Become a member
to unlock all features

Level Up!

Access all courses & lessons on egghead today and lock-in your price for life.


    Use the useEffect React Hook Instead of the componentDidMount Lifecycle Method

    Chris AchardChris Achard

    If you want to make an AJAX call when a React component class component loads, then you can do that in the componentDidMount lifecycle method. However, there is no lifecycle methods in React functional components. Instead, you can use the useEffect hook!

    In this lesson, we'll use the useEffect hook to fetch some JSON from an API when our React component loads. We'll also avoid an infinite loop by passing an empty array of dependencies to the hook, and use the 2nd form of the useState hook inside of useEffect, which takes a callback to get the current value of the useState state.



    Become a Member to view code

    You must be a Member to view code

    Access all courses and lessons, track your progress, gain confidence and expertise.

    Become a Member
    and unlock code for this lesson