Map.prototype.entries()

const map = new Map();

map.set("0", "foo");
map.set(1, "bar");

const iterator = map.entries();

console.log(iterator.next().value);
// : Array ["0", "foo"]

console.log(iterator.next().value);
// : Array [1, "bar"]

entries()

const myMap = new Map();
myMap.set("0", "foo");
myMap.set(1, "bar");
myMap.set({}, "baz");

const mapIter = myMap.entries();

console.log(mapIter.next().value); // ["0", "foo"]
console.log(mapIter.next().value); // [1, "bar"]
console.log(mapIter.next().value); // [Object, "baz"]