手写代码之深拷贝

话不多说，上代码

function deepClone(obj) {
  let newObj = null;
  if (typeof obj === "object") {
    newObj = obj instanceof Array ? [] : {};
    for (let i in obj) {
      newObj[i] = deepClone(obj[i]);
    }
  } else {
    newObj = obj;
  }
  return newObj;
}