useMemoworks similarly to theuseCallback, but rather than returning the function, it returns the computed value from the function, i.e. the function’s output, and only recomputes the function when the dependencies change to provide the new result. For example, let’s say we have a child ...
Let's use an example to illustrate. I will create a new component Counter.js with 2 buttons- one to increment counter1 and other to increment counter2. Based on the counter1 value, we will show whether is odd or even. import React , {useState, useMemo} from 'react'; function Counter...
If certain operations rely on function identity, such as comparing functions or tracking changes based on function references, the memoization of functions with useCallback may interfere with such operations. useCallback Vs. useMemo In a nutshell, useCallback optimizes callback functions, while ...
I didn't appreciate until now that the heuristic for useMemo, useEffect, and any other scopes that get created during a render is different than useCallback. In all the other cases the inner scope is run unconditionally so the normal rules of assuming unconditional access being safe to transfe...