Why Your UI Won’t Update: Debugging Stale Data and Caching in React Apps

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Why Your UI Won’t Update: Debugging Stale Data and Caching in React Apps
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Your UI doesn’t “randomly” refuse to update. In most cases, it’s rendering cached data, which is data that was saved somewhere so the app doesn’t have to do the same work again. Caching is great for performance, but it becomes a pain when you don’t realize which layer is reusing old data. If you’ve ever seen this: You update a profile name, but the screen still shows the old one. You delete an item, but it stays in the list...

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