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Map.prototype.set() - JavaScript | MDN
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Map.prototype.set()

Baseline Widely available

This feature is well established and works across many devices and browser versions. Its been available across browsers since 2015 7.

Map set() Map .

In this article

const map1 = new Map();
map1.set("bar", "foo");

console.log(map1.get("bar"));
// Expected output: "foo"

console.log(map1.get("baz"));
// Expected output: undefined

js
set(key, value)

key

Map . JavaScript ( Javascript ) .

value

Map . JavaScript ( Javascript ) .

Map .

set()

js
const myMap = new Map();

// map   
myMap.set("bar", "foo");
myMap.set(1, "foobar");

// map  
myMap.set("bar", "baz");

set()

set() Map .

js
//    .
myMap.set("bar", "foo").set(1, "foobar").set(2, "baz");

Specification
ECMAScript 2027 LanguageSpecification
# sec-map.prototype.set

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