Design Patterns · Middle · Question 46 of 75

Which pattern does `React.memo` or a `memoize(fn)` function implement?

✓Correct answer: A caching Proxy/Decorator: the wrapper returns the previous result
2Abstract Factory: the wrapper creates a new component on each call
3Visitor: the wrapper walks through all props and changes them

Explanation

The wrapper has the same interface and intercepts the call: if the inputs haven't changed, it returns the stored result. A caching proxy is a classic application of the Proxy pattern.

Which pattern does `React.memo` or a `memoize(fn)` function implement?

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Which pattern does React.memo or a memoize(fn) function implement?

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Test yourself

Which pattern does `React.memo` or a `memoize(fn)` function implement?