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Vue实现购物车场景下的应用

程序员文章站 2022-06-25 13:28:51
本文实例为大家分享了vue在购物车场景下的应用，供大家参考，具体内容如下 购物车场景需求： 1. 商品、店铺、购物车的选择 2. 商品删除 关键代码 测试数据...

本文实例为大家分享了vue在购物车场景下的应用，供大家参考，具体内容如下

购物车场景需求：

1. 商品、店铺、购物车的选择

2. 商品删除

关键代码

测试数据

var _list = [{
 checked: false,
 goods: [{
  name: "商品1",
  price: 23,
  checked: false
 }]
}, {
 checked: false,
 goods: [{
  name: "商品2",
  price: 20,
  checked: false
 }, {
  name: "商品3",
  price: 30,
  checked: false
 }]
}];

店铺对象组成购物车数组 _list
商品对象组成店铺对象下的商品数组 goods
每个商品和店铺都有自己的 checked 字段

一. 选择商品

  • 选择商品
  • 选择店铺下的所有商品
  • 选择购物车里的所有商品

数据绑定

<body class="app">
 <input type="checkbox" v-if="list.length" v-model="checkedall">
 <div v-for="(shopi, shop) in list" class="shop">
  <input type="checkbox" v-model="shop.checked">
  <div v-for="(goodi, good) in shop.goods" class="good">
   <input type="checkbox" v-model="good.checked">
   <span v-html="good.name"></span>
   <span v-html="good.age"></span>
  </div>
 </div>
</body>

var vue = new vue({
 el: '.app',
 data: {
  list: _list
 }
});

监听购物车全选

computed: {
 checkedall: function() {
  return this.checkedshopscount == this.list.length;
 },
 checkedshopscount: function() {
  var i = 0;
  this.list.foreach(function(item) {
   if (item.checked == true) i++;
  });
  return i;
 }
}

当店铺选择数（checkedshopscount）等于店铺数（list.length）时，购物车全选（checkedall）为 true
商品 & 店铺选择事件

<input type="checkbox" v-if="list.length" v-model="checkedall" @change="setallchecked($event)">
<div v-for="(shopi, shop) in list">
 <input type="checkbox" v-model="shop.checked" @change="setgoodchecked(shop)">
 <div v-for="(goodi, good) in shop.goods">
  <input type="checkbox" v-model="good.checked" @change="setshopchecked(good, shop)">
  <span v-html="good.name"></span>
  <span v-html="good.age"></span>
 </div>
</div>

methods: {
 setallchecked: function(e) {
  this.list.foreach(function(shop) {
   shop.checked = e.target.checked;
   shop.goods.foreach(function(good) {
    good.checked = e.target.checked;
   });
  });
 },
 setgoodchecked: function(shop) {
  shop.goods.foreach(function(good) {
   good.checked = shop.checked;
  });
 },
 setshopchecked: function(good, shop) {
  if (!good.checked) {
   shop.checked = false;
  } else {
   // 检查店铺是否存在 checked 为 false 的商品
   shop.checked = !shop.goods.find(function(good) {
    return !good.checked;
   });
  }
 }
}

选择购物车时执行 setallchecked，此时选择所有商品和店铺
选择店铺时执行 setgoodchecked，此时选择该店铺下所有商品
选择商品时执行 setshopchecked
    当商品 checked 为 false 时，取消选择当前店铺
    当商品 checked 为 true 时，判断当前店铺是否选择了所有商品，是则选择当前店铺，否则取消选择当前店铺

二、删除商品

<input type="button" value="删除" @click="deletegood(shop,goodi,list,shopi)">

methods: {
 deletegood: function(shop,goodi,list,shopi) {
  shop.goods.splice(goodi, 1);
  if (shop.goods.length==0) {
   list.splice(shopi, 1);
  }
 }
}

全部代码

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>我的购物车</title>
<script src="vue.min.js"></script>
</head>
<body class="app">
<input type="checkbox" v-if="list.length" v-model="checkedall" @change="setallchecked($event)">
<div v-for="(shopi, shop) in list">
<input type="checkbox" v-model="shop.checked" @change="setgoodchecked(shop)">
<div v-for="(goodi, good) in shop.goods">
<input type="checkbox" v-model="good.checked" @change="setshopchecked(good, shop)">
<span v-html="good.name"></span>
<span v-html="good.age"></span>
<input type="button" value="删除" @click="deletegood(shop,goodi,list,shopi)">
</div>
</div>
</body>
<script>
var _list = [{
checked: false,
goods: [{
name: "商品1",
money: 23,
checked: false
}]
}, {
checked: false,
goods: [{
name: "商品2",
money: 20,
checked: false
}, {
name: "商品3",
money: 30,
checked: false
}]
}];
var vue = new vue({
el: '.app',
data: {
list: _list
},
computed: {
checkedall: function() {
return this.checkedshopscount == this.list.length;
},
checkedshopscount: function() {
var i = 0;
this.list.foreach(function(item) {
if (item.checked == true) i++;
});
return i;
}
},
methods: {
setgoodchecked: function(shop) {
shop.goods.foreach(function(good) {
good.checked = shop.checked;
});
},
setshopchecked: function(good, shop) {
if (!good.checked) {
shop.checked = false;
} else {
shop.checked = !shop.goods.find(function(good) {
return !good.checked;
});
}
},
setallchecked: function(e) {
this.list.foreach(function(shop) {
shop.checked = e.target.checked;
shop.goods.foreach(function(good) {
good.checked = e.target.checked;
});
});
},
deletegood: function(shop, goodi, list, shopi) {
shop.goods.splice(goodi, 1);
if (shop.goods.length == 0) {
list.splice(shopi, 1);
}
}
}
});
</script>
</html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

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