What would be the common mistake of function being called every time the component renders?

Declaring the function inside the component's render method
Not using React.lazy() to lazy-load the component
Not using React.memo() to memoize the component
Not using the shouldComponentUpdate() method to prevent unnecessary re-renders

A common mistake that can cause a function to be called every time the component renders is declaring the function inside the component's render method. This can cause the function to be recreated every time the component renders, even if the function's dependencies have not changed. To avoid this problem, functions should be declared outside the render method, or in a separate file if they are reused across multiple components.

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