Summary
Get a brief summary of what we've learned in this chapter.
We'll cover the following
Key takeaways
Let's recap the key points we learned in this chapter.
In our exploration of the
useMemo
hook, we initially delved into the concept by understanding potential performance bottlenecks in a general context. By recognizing the need for optimization, we embarked on a journey to comprehend the intricacies ofuseMemo
design.Then we explored the
useMemo
design and learned line by line how an optimization scheme is constructed to reuse the last value without creating a new one every time.As we progressed, we comprehensively covered various scenarios where reusing a value becomes crucial, elucidated through the lens of a dependency array. This exploration enabled us to appreciate the versatility and power of
useMemo
in tailoring memoization strategies to specific dependencies.We took
useMemo
for a spin, and at the end, we saw how it's applied to two classic examples, clicking to search and debouncing the search.
Questions and answers
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