从JS Map获取第一个值

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

const valuesArray = Array.from(myMap.values());
const firstValue = valuesArray[0];
console.log(firstValue); // 输出：value1

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

const [[firstKey, firstValue]] = Array.from(myMap.entries());
console.log(firstValue); // 输出：value1

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

let firstValue;
myMap.forEach((value) => {
  if (!firstValue) {
    firstValue = value;
  }
});
console.log(firstValue); // 输出：value1