React · Theory

React Compiler

Theory

87/94

React Compiler

The React Compiler (React Forget) auto-memoizes safe parts of your components so you write fewer useMemo/useCallback. It is not an excuse for impure render (new Date() as id, mutating props). You still write correct effect deps. Say: helper, not magic.

React Compiler — output — helper, not magic. Don’t ship impure render and hope the compiler saves you.

Exam tip

Auto-memo + purity still required.

Example

// React Compiler
console.log("compiler: skip extra re-renders when safe");
console.log("you still: pure render, correct effect deps");

React Compiler — output: helper, not magic. Don’t ship impure render and hope the compiler saves you.

Short notes

Does : auto-memo where safe.
You : keep render pure.
Traphoping it fixes bad effects.

React · Theory

React Compiler

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Theory

87/94

React Compiler

React Compiler — output — helper, not magic. Don’t ship impure render and hope the compiler saves you.

Exam tip

Auto-memo + purity still required.

Example

// React Compiler
console.log("compiler: skip extra re-renders when safe");
console.log("you still: pure render, correct effect deps");

React Compiler — output: helper, not magic. Don’t ship impure render and hope the compiler saves you.

Short notes

Does : auto-memo where safe.
You : keep render pure.
Traphoping it fixes bad effects.

React Compiler

Example

Short notes

Questions

React Compiler

Example

Short notes

Questions