We schedule a new setTimeout called timer when the App component mounts for the first time.Īs a result, the code inside of the setTimeout block runs after 1 second as indicated by the 1000 millisecond value that’s passed into the second parameter of the setTimeout method. If you want to learn more about Hooks, I recommend my tutorial on Simplifying Forms using React Hooks. Our functional component runs the useEffect method when it first renders.
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