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Showing content from https://developer.cdn.mozilla.net/ko/docs/Web/JavaScript/Reference/Global_Objects/Map/size below:

Map.prototype.size

Baseline Widely available

Map ì¸ì¤í´ì¤ì size ì ê·¼ì ìì±ì ì´ Map ê°ì²´ì ìì ìë¥¼ ë°íí©ëë¤.

const map1 = new Map();

map1.set("a", "alpha");
map1.set("b", "beta");
map1.set("g", "gamma");

console.log(map1.size);
// Expected output: 3

size ê°ì Map ê°ì²´ì ëª ê°ì íëª©ì´ ìëì§ ëíë´ë ì ììëë¤. size ì¤ì ì ê·¼ì í¨ìë undefined ì´ë¯ë¡ ì´ ìì±ì ë³ê²½í ì ììµëë¤.

const myMap = new Map();
myMap.set("a", "alpha");
myMap.set("b", "beta");
myMap.set("g", "gamma");

console.log(myMap.size); // 3

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