Answers for "hook equivalent of componentwillunmount"

componentdidmount hooks

For componentDidMount
useEffect(() => {
  // Your code here
}, []);

For componentDidUpdate
useEffect(() => {
  // Your code here
}, [yourDependency]);

For componentWillUnmount
useEffect(() => {
  // componentWillUnmount
  return () => {
     // Your code here
  }
}, [yourDependency]);

componentdidmount react hooks

const num = 5

useEffect(() => {
  console.log("I will only run if my deps change: ", num)
}, [num])