.has js
const map1 = new Map();
map1.set('bar', 'foo');
console.log(map1.has('bar'));
// expected output: true
console.log(map1.has('baz'));
// expected output: false.has js
const map1 = new Map();
map1.set('bar', 'foo');
console.log(map1.has('bar'));
// expected output: true
console.log(map1.has('baz'));
// expected output: false.has js
The has() function of the map object accepts a key in string format and returns a boolean value of true if the specified key exists. Otherwise, the function returns false.Copyright © 2021 Codeinu
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