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Is it time to forget about useCallback & memo?
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Hey friend, This is one of the most exciting updates in the React ecosystem: the React Compiler โ๏ธ. I am incredibly excited because we can now use the Next.js 15 RC โ๏ธ with this compiler and eliminate many React hooks we've been using, such as useCallback, useMemo, memo, and more. If you prefer to watch the video instead, then check out my latest video here ๐ How does React Compiler ACTUALLY work?
Our Weekly Snack: Is it time to forget useCallback or useMemo?First of all, why are we questioning this? Well, that's because React compiler is out. What is React Compiler?React Compiler is an automatic optimizer for React code. It analyzes your components and optimizes them for performance, reducing the need for manual memoization with hooks ๐ช like These hooks are currently used to prevent unnecessary re-renders of components based on whether their props or state have truly changed. React Compiler will optimize your React code provided you follow the Rules of React โ๏ธ. Now, not using hooks inside a function, function should always return the same output etc. are all part of the rules. These are rules we're aware of. It can reduce the need for developers to manually add memoization code. For example, you may not need to add useCallback and useMemo everywhere as React is going to optimize that for you. Here is an example, How you can get Next.js 15 React Compiler for a new project:How can you enable React Compiler?There are 2 modes:
๐งฉ Opt-in mode: React Compiler can be enabled in annotation mode, which allows developers to control which components are optimized. This is seen in the left terminal. โจ Compile all components: Setting it to true will get all components to get optimized. Is React Compiler a Silver Bullet?While React Compiler is a powerful tool, it's essential to remember:
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Latest Frontend NewsFind out if people on Twitter ๐ข actually ship code or if they're just shiptalking with Ship Talkers โ๏ธ. โGPT skeleton โ๏ธ converts your components into Skeleton UI. You can simply copy paste. โBeautiful Gradients โ๏ธ ready to use for your projects or apps or to add a little whimsy to your apps. Add sounds to your application for user clicks or to have some fun, with the use-sound hook โ๏ธ. โAstro 4.10 is out โ๏ธ โจ Changes include,
What if there was a Next.js form lib that does both client and server validation from one Zod schema, well, this is possible through conform โ๏ธ.โ โTailwind released a new version โ๏ธ of `prettier-plugin-tailwindcss` โจ that automatically cleans up unnecessary whitespace in your class lists
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Ankita Kulkarni
Join 9200+ subscribers reading by weekly personalized Newsletter that helps developers level up their skills through weekly Frontend and Leadership Snacks. You get a deep dive into a Tech topic, Actionable tips to excel in your career and a toolbox!
Hey Reader, Iโve been diving deep into React 19.2 and Next.js 16 Beta this week, and honestly, itโs such a solid update. I have started to incorporate so many of the features in my Next.js Custom Course Platform and have seen massive improvements. But before we jump into this weekโs snack, letโs hear it from our sponsor. ๐ But before that, let's hear it from our Sponsor. PRESENTED BY CODERABBIT AI Most AI test tools just throw random assertions at your code and call it โcoverage.โ But they...
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