ReferenceError

ReferenceError 객체는 존재하지 않는 변수를 참조했을 때 발생하는 에러를 나타냅니다.

문법

new ReferenceError([message[, fileName[, lineNumber]]])

파라미터

message: 선택사항. 에러에 대한 설명문
fileName Non-Standard: 선택사항. 예외가 발생한 코드를 포함하는 파일의 이름
lineNumber Non-Standard: 선택사항. 예외가 발생한 코드의 줄 번호

설명

ReferenceError는 선언된 적이 없는 변수를 참조하려고 할 때 발생합니다.

생성자

ReferenceError() (en-US): Creates a new ReferenceError object.

인스턴스 속성

ReferenceError.prototype.message: Error message.
ReferenceError.prototype.name: Error name. Inherited from Error.
ReferenceError.prototype.fileName: Path to file that raised this error. Inherited from Error.
ReferenceError.prototype.lineNumber: Line number in file that raised this error. Inherited from Error.
ReferenceError.prototype.columnNumber: Column number in line that raised this error. Inherited from Error.
ReferenceError.prototype.stack (en-US): Stack trace. Inherited from Error.

예제

`ReferenceError` 처리하기

try {
  var a = undefinedVariable;
} catch (e) {
  console.log(e instanceof ReferenceError); // true
  console.log(e.message);                   // "undefinedVariable is not defined"
  console.log(e.name);                      // "ReferenceError"
  console.log(e.fileName);                  // "Scratchpad/1"
  console.log(e.lineNumber);                // 2
  console.log(e.columnNumber);              // 6
  console.log(e.stack);                     // "@Scratchpad/2:2:7\n"
}

`ReferenceError` 생성하기

try {
  throw new ReferenceError('Hello', 'someFile.js', 10);
} catch (e) {
  console.log(e instanceof ReferenceError); // true
  console.log(e.message);                   // "Hello"
  console.log(e.name);                      // "ReferenceError"
  console.log(e.fileName);                  // "someFile.js"
  console.log(e.lineNumber);                // 10
  console.log(e.columnNumber);              // 0
  console.log(e.stack);                     // "@Scratchpad/2:2:9\n"
}

명세

Specification	Status	Comment
ECMAScript 3rd Edition (ECMA-262)	Standard	Initial definition.
ECMAScript 5.1 (ECMA-262) The definition of 'ReferenceError' in that specification.	Standard
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'ReferenceError' in that specification.	Standard
ECMAScript (ECMA-262) The definition of 'ReferenceError' in that specification.	Living Standard

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