Set()

Baseline

20157

Set() Set

const set = new Set([1, 2, 3, 4, 5]);

console.log(set.has(1));
// : true

console.log(set.has(5));
// : true

console.log(set.has(6));
// : false

new Set()
new Set(iterable)

: Set() new new TypeError

iterable

Set

null Set

Set

`Set`

const mySet = new Set();

mySet.add(1); // Set [ 1 ]
mySet.add(5); // Set [ 1, 5 ]
mySet.add(5); // Set [ 1, 5 ]
mySet.add("some text"); // Set [ 1, 5, 'some text' ]
const o = { a: 1, b: 2 };
mySet.add(o);


ECMAScript 2027 LanguageSpecification # sec-set-constructor

Set (core-js)
es-shims Set
Set

MDN

MDN 2025818

GitHub

Set
1. Set()
1. [Symbol.species]
1. size
Object/Function
1. __proto__
2. constructor