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  1. 개발자를 위한 웹 기술
  2. JavaScript
  3. JavaScript 참고서
  4. 표준 내장 객체
  5. WeakMap
  6. WeakMap.prototype.get()
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WeakMap.prototype.get()

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.

get() 메서드는 WeakMap 객체에서 특정 요소를 반환합니다.

In this article

시도해 보기

const weakmap1 = new WeakMap(); const object1 = {}; const object2 = {}; weakmap1.set(object1, 42); console.log(weakmap1.get(object1)); // Expected output: 42 console.log(weakmap1.get(object2)); // Expected output: undefined

구문

js
get(key);

매개변수

key

필수로 요구되며,WeakMap 객체에서 반환할 요소의 키입니다.

반환 값

WeakMap 객체의 특정 키와 연결된 요소입니다. 키를 찾을 수 없으면 undefined가 반환됩니다.

예제

get() 메서드 사용하기

js
const wm = new WeakMap(); wm.set(window, "foo"); wm.get(window); // "foo" 반환. wm.get("baz"); // undefined 반환.

명세서

Specification
ECMAScript® 2027 Language Specification
# sec-weakmap.prototype.get

브라우저 호환성

Enable JavaScript to view this browser compatibility table.

같이 보기

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This page was last modified on 2025년 2월 11일 by MDN contributors.

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  1. 표준 내장 객체
  2. WeakMap
  3. 생성자
    1. WeakMap() constructor
  4. 인스턴스 메서드
    1. WeakMap.prototype.delete()
    2. WeakMap.prototype.get()
    3. getOrInsert()
    4. getOrInsertComputed()
    5. WeakMap.prototype.has()
    6. WeakMap.prototype.set()
  5. 상속
  6. Object/Function
  7. 정적 메서드
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toSource()
    5. Function.prototype[@@hasInstance]()
  8. 정적 속성
    1. Function: displayName
    2. Function.prototype.length
    3. Function: name
    4. Function
    5. Function.arguments
    6. Function.prototype.caller
  9. 인스턴스 메서드
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toString()
    10. Object.prototype.valueOf()
  10. 인스턴스 속성
    1. Object.prototype.__proto__
    2. Object.prototype.constructor

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