Ich habe die Take-Away-App Ele.me mit hohem Nachahmungsgrad von Vue.js online heruntergeladen

data.json 修改了，但是dom不更新， 求大神解答！！！

{
  "seller": {
    "name": "粥品香坊（回龙观）",
    "description": "蜂鸟专送111111",
    "deliveryTime": 38,
    "score": 4.2,
    "serviceScore": 4.1,
    "foodScore": 4.3,
    "rankRate": 69.2,
    "minPrice": 20,
    "deliveryPrice": 4,
    "ratingCount": 24,
    "sellCount": 90,
    "bulletin": "粥品香坊其烹饪粥料的秘方源于中国千年古法，在融和现代制作工艺，由世界烹饪大师屈浩先生领衔研发。坚守纯天然、0添加的良心品质深得消费者青睐，发展至今成为粥类的引领品牌。是2008年奥运会和2013年园博会指定餐饮服务商。",
    "supports": [
      {
        "type": 0,
        "description": "在线支付满28减5"
      },
      {
        "type": 1,
        "description": "VC无限橙果汁全场8折"
      },
      {
        "type": 2,
        "description": "单人精彩套餐"
      },
      {
        "type": 3,
        "description": "该商家支持发票,请下单写好发票抬头"
      },
      {
        "type": 4,
        "description": "已加入“外卖保”计划,食品安全保障"
      }
    ],
    "avatar": "http://static.galileo.xiaojukeji.com/static/tms/seller_avatar_256px.jpg",
    "pics": [
      "http://fuss10.elemecdn.com/8/71/c5cf5715740998d5040dda6e66abfjpeg.jpeg?imageView2/1/w/180/h/180",
      "http://fuss10.elemecdn.com/b/6c/75bd250e5ba69868f3b1178afbda3jpeg.jpeg?imageView2/1/w/180/h/180",
      "http://fuss10.elemecdn.com/f/96/3d608c5811bc2d902fc9ab9a5baa7jpeg.jpeg?imageView2/1/w/180/h/180",
      "http://fuss10.elemecdn.com/6/ad/779f8620ff49f701cd4c58f6448b6jpeg.jpeg?imageView2/1/w/180/h/180"
    ],
    "infos": [
      "该商家支持发票,请下单写好发票抬头",
      "品类:其他菜系,包子粥店",
      "北京市昌平区回龙观西大街龙观置业大厦底商B座102单元1340",
      "营业时间:10:00-20:30"
    ],
    "choosePlace": [
      "福楼1号菜桌",
      "会议楼露厅",
      "会议楼一层大圆桌"
    ]
  },
}

Eingang: APP.vue

<template>
  <p>
    <v-header :seller="seller"></v-header>
    <p class="tab border-1px">
      <p class="tab-item">
        <router-link to="/goods">商品</router-link>
      </p>
      <p class="tab-item">
        <router-link to="/ratings">评论</router-link>
      </p>
      <p class="tab-item">
        <router-link to="/seller">商家</router-link>
      </p>
    </p>
    <keep-alive>
      <router-view :seller="seller"></router-view>
    </keep-alive>
  </p>
</template>

<script type="text/ecmascript-6">
  import {urlParse} from 'common/js/util';
  import header from 'components/header/header.vue';

  const ERR_OK = 0;

  export default {
    data() {
      return {
        seller: {
          id: (() => {
            let queryParam = urlParse();
            return queryParam.id;
          })()
        }
      };
    },
    created() {
      this.$http.get('/api/seller?id=' + this.seller.id).then((response) => {
        response = response.body;
        if (response.errno === ERR_OK) {
          this.seller = Object.assign({}, this.seller, response.data);
        }
      });
    },
    components: {
      'v-header': header
    }
  };

</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "./common/stylus/mixin.styl"

  .tab
    display: flex
    width: 100%
    height: 40px
    line-height: 40px
    // border-bottom: 1px solid rgba(7, 17, 27, 0.1)
    border-1px(rgba(7, 17, 27, 0.1))
    .tab-item
      flex: 1
      text-align: center
      & > a
        display: block
        font-size: 14px
        color: rgb(77, 85, 93)
        &.active
          color: rgb(240, 20, 20)
</style>

header.vue

<template>
  <p>
    <v-header :seller="seller"></v-header>
    <p class="tab border-1px">
      <p class="tab-item">
        <router-link to="/goods">商品</router-link>
      </p>
      <p class="tab-item">
        <router-link to="/ratings">评论</router-link>
      </p>
      <p class="tab-item">
        <router-link to="/seller">商家</router-link>
      </p>
    </p>
    <keep-alive>
      <router-view :seller="seller"></router-view>
    </keep-alive>
  </p>
</template>

<script type="text/ecmascript-6">
  import {urlParse} from 'common/js/util';
  import header from 'components/header/header.vue';

  const ERR_OK = 0;

  export default {
    data() {
      return {
        seller: {
          id: (() => {
            let queryParam = urlParse();
            return queryParam.id;
          })()
        }
      };
    },
    created() {
      this.$http.get('/api/seller?id=' + this.seller.id).then((response) => {
        response = response.body;
        if (response.errno === ERR_OK) {
          this.seller = Object.assign({}, this.seller, response.data);
        }
      });
    },
    components: {
      'v-header': header
    }
  };

</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "./common/stylus/mixin.styl"

  .tab
    display: flex
    width: 100%
    height: 40px
    line-height: 40px
    // border-bottom: 1px solid rgba(7, 17, 27, 0.1)
    border-1px(rgba(7, 17, 27, 0.1))
    .tab-item
      flex: 1
      text-align: center
      & > a
        display: block
        font-size: 14px
        color: rgb(77, 85, 93)
        &.active
          color: rgb(240, 20, 20)
</style>