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

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.

Set 인스턴스의 add() 메서드는 같은 값인 요소가 이 Set에 없다면 지정된 값과 함께 새로운 요소를 이 Set에 삽입합니다.

In this article

시도해 보기

const set1 = new Set(); set1.add(42); set1.add(42); set1.add(13); for (const item of set1) { console.log(item); // Expected output: 42 // Expected output: 13 }

구문

js
add(value)

매개변수

value

Set 객체에 추가할 요소의 값.

반환 값

추가된 값이 포함된 Set 객체.

예제

add 메서드 사용하기

js
const mySet = new Set(); mySet.add(1); mySet.add(5).add("some text"); // 계속 붙일 수 있음 console.log(mySet); // Set [1, 5, "some text"]

명세서

Specification
ECMAScript® 2027 Language Specification
# sec-set.prototype.add

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. Set
  3. 생성자
    1. Set() 생성자
  4. 정적 속성
    1. Set[Symbol.species]
  5. 인스턴스 메서드
    1. Set.prototype.add()
    2. Set.prototype.clear()
    3. Set.prototype.delete()
    4. Set.prototype.difference()
    5. Set.prototype.entries()
    6. Set.prototype.forEach()
    7. Set.prototype.has()
    8. Set.prototype.intersection()
    9. Set.prototype.isDisjointFrom()
    10. Set.prototype.isSubsetOf()
    11. Set.prototype.isSupersetOf()
    12. Set.prototype.keys()
    13. Set.prototype.symmetricDifference()
    14. Set.prototype.union()
    15. Set.prototype.values()
    16. Set.prototype[@@iterator]()
  6. 인스턴스 속성
    1. Set.prototype.size
  7. 상속
  8. Object/Function
  9. 정적 메서드
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toSource()
    5. Function.prototype[@@hasInstance]()
  10. 정적 속성
    1. Function: displayName
    2. Function.prototype.length
    3. Function: name
    4. Function
    5. Function.arguments
    6. Function.prototype.caller
  11. 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()
  12. 인스턴스 속성
    1. Object.prototype.__proto__
    2. Object.prototype.constructor

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