搞不懂for in循环中，key的值

Question

  用axios提取出本地的json文件，格式如下

  

  "Merch": {

"hamburger": {

  "1": {

    "goodsImg": "http://7xjyw1.com1.z0.glb.clouddn.com/pos001.jpg",

    "goodsName": "香辣鸡腿堡",

    "price": 18

  },

  "2": {

    "goodsImg": "http://7xjyw1.com1.z0.glb.clouddn.com/pos002.jpg",

    "goodsName": "田园鸡腿堡",

    "price": 15

  }

},

"friedChicken": {

  "3": {

    "goodsImg": "http://7xjyw1.com1.z0.glb.clouddn.com/pos003.jpg",

    "goodsName": "大包薯条",

    "price": 18

  },

  "4": {

    "goodsImg": "http://7xjyw1.com1.z0.glb.clouddn.com/pos002.jpg",

    "goodsName": "脆皮炸鸡腿",

    "price": 20

  }

｝

axios

  .get("/static/data/Merch.json")

  .then(response => {

    let Merchs = response.data.Merch;

    for (let key in Merchs) {

      let eph = Merchs[key];

      this.typeMerch.key=eph;

    }        

  })

  

  console.log(key),打印出来的是hamburger和frideChicken；

  但是下面想添加进属性里，key却变成了字符串

  为什么啊

  有大大可以解释一下吗

  

  

Answer 1

this.typeMerch[key]=eph;这样？其实我没大看懂问题。。。