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
1×
Become a member
to unlock all features

Level Up!

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

Autoplay

    Optimistically Update Multiple Values in State Using React's setState

    reactReact
    ^16.0.0

    We'll add a method to our class-based React component and immediately update state before firing off our request. Using a setState updater function, we will update component state based on previous state and toggle the "liked" status of a tweet upon the user clicking the heart icon. We will simultaneously increment or decrement the target tweet's likes property and appropriately add or remove the tweetId from the likedTweets array.