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

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.

Map의 clear() 메서드는 해당 Map의 모든 요소를 제거합니다.

In this article

시도해 보기

const map1 = new Map(); map1.set("bar", "baz"); map1.set(1, "foo"); console.log(map1.size); // Expected output: 2 map1.clear(); console.log(map1.size); // Expected output: 0

구문

js
clear()

매개변수

없음.

반환 값

없음(undefined).

예제

clear() 사용하기

js
const myMap = new Map(); myMap.set("bar", "baz"); myMap.set(1, "foo"); console.log(myMap.size); // 2 console.log(myMap.has("bar")); // true myMap.clear(); console.log(myMap.size); // 0 console.log(myMap.has("bar")); // false

명세서

Specification
ECMAScript® 2027 Language Specification
# sec-map.prototype.clear

브라우저 호환성

Enable JavaScript to view this browser compatibility table.

같이 보기

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  1. 표준 내장 객체
  2. Map
  3. 생성자
    1. Map() 생성자
  4. 정적 메서드
    1. Map.groupBy()
  5. 정적 속성
    1. Map[@@species]
  6. 인스턴스 메서드
    1. Map.prototype.clear()
    2. Map.prototype.delete()
    3. Map.prototype.entries()
    4. Map.prototype.forEach()
    5. Map.prototype.get()
    6. getOrInsert()
    7. getOrInsertComputed()
    8. Map.prototype.has()
    9. Map.prototype.keys()
    10. Map.prototype.set()
    11. Map.prototype.values()
    12. Map.prototype[@@iterator]()
  7. 인스턴스 속성
    1. Map.prototype.size
  8. 상속
  9. Object/Function
  10. 정적 메서드
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toSource()
    5. Function.prototype[@@hasInstance]()
  11. 정적 속성
    1. Function: displayName
    2. Function.prototype.length
    3. Function: name
    4. Function
    5. Function.arguments
    6. Function.prototype.caller
  12. 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()
  13. 인스턴스 속성
    1. Object.prototype.__proto__
    2. Object.prototype.constructor

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