Error

Error

• Error objects are thrown when runtime errors occurr
• user-defined exceptions의 base로 사용가능
• other built-in error objects : EvalError, RangeError, ReferenceError, ...

constructor

• Error('error-message', options )
• options
  • cause

fields

• error.message : 에러 메시지
• error.name : 에러 이름
• error.stack

methods

• error.toString()

try{
  throw new Error('Some Random Error', { cause : 'No Reason'})  
}catch(e){
  console.log(e.name) // `Error`
  console.log(e.message)// `Some Random Error`
  console.log(e.cause) // `No Reason`
}

---

Custom Error

• Error 를 base로 정의가능

// ES6 way
class CustomError extends Error {
  constructor(message, options) {
    super(message, options)
  }
}

References

• Error
• JS-Errors