-- 实现深克隆

深拷贝纯对象

function deepClone(transData){
  let returnData = {}
  if(Array.isArray(transData)){
    returnData=[]
  }
  for(let item of Object.keys(transData)){
    if(typeof transData[item] === 'object'||typeof transData[item] === 'array' ){
      let complexData = copyObj(transData[item])
      returnData[item] = complexData
    }else{
      returnData[item] = transData[item]
    }
  }
  return returnData
}
let data = {
  name:'流',
  age:54,
  property:{
    attack:10,
    defend:25
  }
}
let chief = deepClone(data)
console.log(chief)
data.property.attack = 999
console.log(chief);