SOURCE

var obj = {
    a: '123',
    b: 234,
    c: true,
    d: null,
    e: function() {console.log('test')},
    h: new Set([4,3,null]),
    i:Symbol('fsd'),
    k: new Map([ ["name", "test"],  ["title", "Author"]  ])
}
function deepCopy(data) {
      if(typeof data !== 'object' || data === null){
            throw new TypeError('传入参数不是对象')
        }
      let newData = {};
      const dataKeys = Object.keys(data);
      dataKeys.forEach(value => {
         const currentDataValue = data[value];
         // 基本数据类型的值和函数直接赋值拷贝 
         if (typeof currentDataValue !== "object" || currentDataValue === null) {
              newData[value] = currentDataValue;
          } else if (Array.isArray(currentDataValue)) {
             // 实现数组的深拷贝
            newData[value] = [...currentDataValue];
          } else if (currentDataValue instanceof Set) {
             // 实现set数据的深拷贝
             newData[value] = new Set([...currentDataValue]);
          } else if (currentDataValue instanceof Map) {
             // 实现map数据的深拷贝
             newData[value] = new Map([...currentDataValue]);
          } else { 
             // 普通对象则递归赋值
             newData[value] = deepCopy(currentDataValue);
          } 
       }); 
      return newData;
  }
  var newObj = deepCopy(obj)
  console.log(newObj)