Map - JavaScript | MDN

const map = new Map(); map.set("a", 1); map.set("b", 2); map.set("c", 3); console.log(map.get("a")); // Expected output: 1 map.set("a", 97); console.log(map.get("a")); // Expected output: 97 console.log(map.size); // Expected output: 3 map.delete("b"); console.log(map.size); // Expected output: 2 Description Map objects are collections of key-value pairs. A key in the Map may only occur once; it i