Map,String,Json之間轉換

1. Map–>String
   const map = new Map([
   [‘name’, ‘Tom’],
   [‘country’, ‘Chile’],
   ]);

// Convert to JSON string
const jsonStr = JSON.stringify(Object.fromEntries(map));

// ️ ‘{“name”: “Tom”, “country”: “Chile”}’

//將string --> Object --> Map
const obj = JSON.parse(jsonStr);

const mapAgain = new Map(Object.entries(obj));
console.log(mapAgain); // ️ {‘name’ => ‘Tom’, ‘country’ => ‘Chile’}