手写实现深拷贝一基础版

function deepClone(source) {
  if(typeof source !== "object" || source == null){
    return source;
  }
  const target = Array.isArray(source) ? [] : {};
  for(const key in source){
    if( typeof source[key] === "object" && source[key] !== null){
      target[key] = deepClone(source[key]);
    } else {
      target[key] = source[key];
    }
  }
  return target;
}

const original = {
  number: 123,
  string: "hello",
  array: [1,2,3],
  obj: {
    prop1: "test",
    prop2: {
      nested: "test2",
    },
  },
};

const cloned = deepClone(original);

console.log(cloned);
//{
//  number: 123,
//  string: 'hello',
//  array: [ 1, 2, 3 ],
//  obj: { prop1: 'test', prop2: { nested: 'test2' } }
//}