The next thing to be on the lookout for is the Suspense API. If you got lost anywhere along the way, don't forget to check out the demo and source. For a complete FAQ on all things relating to hooks, check out the Hooks FAQ. I didn't cover every use case for Hooks, or all functionality in-depth, but I tried to provide a working example of a complete, albeit simple, React program. We have a complete CRUD app utilizing React State and Effect hooks. ![]() We can fix this issue by adding setEditing(false) to the deleteUser function in App.js.Īnd that's it. I said there were two issues here, and the other issue is that you can delete a user while it is currently being edited. If you dug up some HTML or CSS written back in 1995, it's entirely possible it would not work (or work the same) today. HTML and CSS, by contrast, are forwards-compatible but not backwards-compatible. Now if you try to change the user you're editing, it will work correctly! JS is not forwards-compatible, despite many wishing such, and even incorrectly believing the myth that it is. If you're doing a one-time event like componentDidMount, you can pass an empty array ( ) instead. Using the array is similar to using componentDidUpdate. ![]() Before, we needed to compare if (prevProps.currentUser != ), but with the Effect Hook we can just pass through to let it know we're watching props. In the Effect Hook, we create a callback function that updates the user state with the new prop that's being sent through.
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