JSFiddle - React, Tailwind, and code Playground

by Sunny SM

JavaScript

const aboutAuthor = new WeakMap(); // Create New WeakMap
const currentAge = {}; // key must be an object
const currentCity = {}; // keys must be an object

aboutAuthor.set(currentAge, 30); // Set Key Values
aboutAuthor.set(currentCity, 'Denver'); // Key Values can be of different data types

console.log(aboutAuthor.has(currentCity)); // Test if WeakMap has a key

aboutAuthor.delete(currentAge); // Delete a key

console.log(aboutAuthor.has(currentAge)); // Test if WeakMap has a key