Using the Effect Hook complete example how effect hook works in js

working link
========
https://stackblitz.com/edit/useeffect-hook?file=index.js

Similar to componentDidMount and componentDidUpdate (class component)

//code

 const getUser=async()=>{        let response = await fetch(          props.url);               let user = await response.json();            drawView(user)         }

  //just one call like componentDidMount

   useEffect(()=>{
     
      getUser();
      
    
   },[])

 //update on every render 

   useEffect(()=>{
     
      getUser();
      
    
   })

 //update on some special props updation

useEffect(()=>{
     
      getUser();
      
    
   },[props])