使用map，动态添加对象属性名，属性值

  // 将map转为对象
  function MapchangeToObj(strMap: any) {
    let obj = {};
    for (let [key, val] of strMap) {
      obj[key] = val;
    }
    return obj;
  }

  let arrmap: any = new Map();

  arrmap.set('test', 123);

MapchangeToObj.(arrmap) // { test:123 }