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CODE EXAMPLE FOR JAVASCRIPT

useEffect

useEffect(()=>{
  // It will run everytime  
})

// onMount 
useEffect(()=>{
  // It will run only one time  
},[]) 

// component didUpdate
useEffect(()=>{
  // it will run when dependency array change   
},[data])

// component willUnmount
useEffect(()=>{
  // for cleaning up the code
  return(()=>{
  })
})
Source by bobbyhadz.com #
 
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