javascript 예외처리

Posted 2021-05-03

function sum(x,y){
  if(typeof x !== 'number' || typeof y !== 'number' ){
    throw '숫자가 아닙니다'
  }
  return x + y
}

function f2(){
  console.log('f2 start')
  throw new Error('에러!')
  console.log('f2 end') //이부분은 실행되지 않음
}

function f1(){
  console.log('f1 start')
  try{
    f2()
  } catch(e){
    console.log(e)
  }
  console.log('f1 end')
}

console.log('will : f1')
f1()
console.log('did : f1')