const myMap = new Map();
myMap.set('key1', 'value1');
myMap.set('key2', 'value2');
myMap.set('key3', 'value3');

const firstValue = [...myMap.values()][0];
console.log(firstValue); // Output: value1

In the above code, we create a new Map object called myMap and add key-value pairs to it. To retrieve all the values from the Map, we use the values() method and convert it to an array using the spread operator (...). Finally, we access the first element of the array using [0] and assign it to the firstValue variable.