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URL: http://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Object/getPrototypeOf

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Object.getPrototypeOf()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015년 7월.

Object.getPrototypeOf() 메서드는 지정된 객체의 프로토타입(가령 내부 [[Prototype]] 속성값)을 반환합니다.

구문

js
Object.getPrototypeOf(obj);

매개변수

obj

자신의 프로토타입이 반환되는 객체.

js
var proto = {};
var obj = Object.create(proto);
Object.getPrototypeOf(obj) === proto; // true

주의

ES5에서, obj 매개변수가 객체가 아닌 경우 TypeError 예외가 발생합니다. ES6에서, 매개변수는 Object로 강제됩니다.

js
Object.getPrototypeOf("foo");
// TypeError: "foo"는 객체가 아닙니다 (ES5 코드)
Object.getPrototypeOf("foo");
// String.prototype                  (ES6 코드)

명세

Specification
ECMAScript® 2026 Language Specification
# sec-object.getprototypeof

브라우저 호환성

Opera 전용 주의사항

이전 Opera 버전이 Object.getPrototypeOf()를 아직 지원하지 않지만, Opera는 Opera 10.50 이후로 비표준 Object.prototype.__proto__ 속성을 지원합니다.

참조

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