Vue购物车案例（全选，反选，加入，删除，加减，总价，数量）

问题遇到的现象和发生背景

我想问问这个专题里面的tupian.json在哪里

问题相关代码，请勿粘贴截图

运行结果及报错内容

我的解答思路和尝试过的方法

我想要达到的结果

list: [
      {
        "id": 1,
        "name": "小米9 SE",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/5652bd7a2f8bd6daaa1dd4b5c3c2e9b3.jpg",
        "price": 1999,
        "slogan": "新品看点：弹出式肩键｜真实机械感反馈",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 2,
        "name": "Redmi K40 游戏增强版",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/61454401f855cf5ed64747a6ac04bae5.jpg",
        "price": 2999,
        "slogan": "新品看点：年度旗舰骁龙870，新一代 E4 AMOLED旗舰直屏",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 3,
        "name": "小米9 SE",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/5652bd7a2f8bd6daaa1dd4b5c3c2e9b3.jpg",
        "price": 3999,
        "slogan": "新品看点：弹出式肩键｜真实机械感反馈",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 4,
        "name": "Redmi K40 游戏增强版",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/61454401f855cf5ed64747a6ac04bae5.jpg",
        "price": 4999,
        "slogan": "新品看点：年度旗舰骁龙870，新一代 E4 AMOLED旗舰直屏",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 5,
        "name": "小米9 SE",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/5652bd7a2f8bd6daaa1dd4b5c3c2e9b3.jpg",
        "price": 999,
        "slogan": "新品看点：弹出式肩键｜真实机械感反馈",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 6,
        "name": "Redmi K40 游戏增强版",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/61454401f855cf5ed64747a6ac04bae5.jpg",
        "price": 2999,
        "slogan": "新品看点：年度旗舰骁龙870，新一代 E4 AMOLED旗舰直屏",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 7,
        "name": "小米9 SE",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/5652bd7a2f8bd6daaa1dd4b5c3c2e9b3.jpg",
        "price": 1999,
        "slogan": "新品看点：弹出式肩键｜真实机械感反馈",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 8,
        "name": "Redmi K40 游戏增强版",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/61454401f855cf5ed64747a6ac04bae5.jpg",
        "price": 699,
        "slogan": "新品看点：年度旗舰骁龙870，新一代 E4 AMOLED旗舰直屏",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 9,
        "name": "小米9 SE",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/5652bd7a2f8bd6daaa1dd4b5c3c2e9b3.jpg",
        "price": 799,
        "slogan": "新品看点：弹出式肩键｜真实机械感反馈",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 10,
        "name": "Redmi K40 游戏增强版",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/61454401f855cf5ed64747a6ac04bae5.jpg",
        "price": 1099,
        "slogan": "新品看点：年度旗舰骁龙870，新一代 E4 AMOLED旗舰直屏",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 11,
        "name": "小米9 SE",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/5652bd7a2f8bd6daaa1dd4b5c3c2e9b3.jpg",
        "price": 1199,
        "slogan": "新品看点：弹出式肩键｜真实机械感反馈",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 12,
        "name": "Redmi K40 游戏增强版",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/61454401f855cf5ed64747a6ac04bae5.jpg",
        "price": 1299,
        "slogan": "新品看点：年度旗舰骁龙870，新一代 E4 AMOLED旗舰直屏",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 13,
        "name": "小米9 SE",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/5652bd7a2f8bd6daaa1dd4b5c3c2e9b3.jpg",
        "price": 1399,
        "slogan": "新品看点：弹出式肩键｜真实机械感反馈",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 14,
        "name": "Redmi K40 游戏增强版",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/61454401f855cf5ed64747a6ac04bae5.jpg",
        "price": 1499,
        "slogan": "新品看点：年度旗舰骁龙870，新一代 E4 AMOLED旗舰直屏",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 15,
        "name": "小米9 SE",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/5652bd7a2f8bd6daaa1dd4b5c3c2e9b3.jpg",
        "price": 15999,
        "slogan": "新品看点：弹出式肩键｜真实机械感反馈",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      },
      {
        "id": 16,
        "name": "Redmi K40 游戏增强版",
        "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/61454401f855cf5ed64747a6ac04bae5.jpg",
        "price": 17999,
        "slogan": "新品看点：年度旗舰骁龙870，新一代 E4 AMOLED旗舰直屏",
        "totalMount": 0,
        "totolPrice": 0,
        "num":1
      }
    ]