var map1 = new Map();
map1.set('bar', 'baz');
map1.set(1, 'foo');
console.log(map1.size);
// expected output: 2
map1.clear();
console.log(map1.size);
// expected output: 0
var map1 = new Map();map1.set('bar', 'baz');map1.set(1, 'foo');console.log(map1.size);// expected output: 2map1.clear();console.log(map1.size);// expected output: 0