different use useeffect hook

how to use useeffect

import React, { useState, useEffect } from 'react';
function Example() {
  const [count, setCount] = useState(0);

  // Similar to componentDidMount and componentDidUpdate:  
  useEffect(() => {    
  	// Update the document title using the browser API    
  	document.title = `You clicked ${count} times`;  
  });
  
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

Posted by: Guest on August-23-2020

Source

useEffect( () => console.log("mount"), [] ); useEffect( () => console.log("will update data1"), [ data1 ] ); useEffect( () => console.log("will update any") ); useEffect( () => () => console.log("will update data1 or unmount"), [ data1 ] ); useEffect( () => () => console.log("unmount"), [] );

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