proper useEffect code example

Example 1: componentwillunmount hooks

useEffect(() => {
  window.addEventListener('mousemove', () => {});

  // returned function will be called on component unmount 
  return () => {
    window.removeEventListener('mousemove', () => {})
  }
}, [])

Example 2: React Hook "useEffect" is called in function

React component names need to start with a capital letter.
That's because React treats components starting with lowercase letters as DOM tags.

Therefore you should name it "Shoes"

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Misc Example

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