The clear() method of Map instances removes all elements from this map.
Syntax
clear()
Parameters
None.
Return value
None (undefined).
Examples
Using clear()
const myMap = new Map();
myMap.set("bar", "baz");
myMap.set(1, "foo");
console.log(myMap.size); // 2
console.log(myMap.has("bar")); // true
myMap.clear();
console.log(myMap.size); // 0
console.log(myMap.has("bar")); // false