Case analysis of shopping cart and address selection using vue2

This time I will bring you a case analysis of vue2's implementation of shopping cart and address selection. What are the precautions for vue2's implementation of shopping cart and address selection. The following is a practical case, let's take a look.

First of all, vue basic js writing method

new Vue({
  el:"#app",
  //模型
  data:{
  },
  filters:{
  },
  mounted:function(){
    this.$nextTick(function(){
    //初始化调用
    });
  },
  computed:{
    //实时计算
  },
  methods:{
  }
});

v-for

<li v-for="(item,index) in productList">
  <p class="item-name">{{item.productName}}</p>
</li>

v-model

(real-time update)

<input type="text" value="0" disabled v-model="item.productQuantity">
<p class="item-price-total">{{item.productQuantity}}</p>

v-bind

<a href="javascript:;" class="item-check-btn" v-bind:class="{&#39;check&#39;:item.checked}">
<!--可通过更改item.checked的值设置是否选中-->
<!--必须用v-bind 不可直接在class里面直接使用{{}}-->
<!--v-bind:class= 可简写为 :class= -->

filtersFilter Use of

#1.html reference method

<p class="item-price">{{item.productPrice | money('元')}}</p>

2.Filter

filters:{
  formatMoney:function(value,type){
    return "￥"+value.toFixed(2)+ type;
  }
},

3. Global filter (written outside new Vue)

Vue.filter("money",function(value,type){
  return "￥"+value.toFixed(2) + type; //保留两位小数 结果eg:￥19.00元
});

Call the method in methods:

@click="method(param)"
//或者
@click="delFlag=false"
@click="limitNum=addressList.length"

computed real-time The calculation is as follows: three pieces of data are displayed by default, click more to display all

<li v-for="(item,index) in filterAddress">
<p class="shipping-addr-more">
<a class="addr-more-btn up-down-btn" href="javascript:" @click="limitNum=addressList.length">
  more
  <i class="i-up-down">
   <i class="i-up-down-l"></i>
   <i class="i-up-down-r"></i>
  </i>
 </a>
</p>
data:{
    limitNum:3
  },
computed:{
  filterAddress:function(){
    return this.addressList.slice(0,this.limitNum);
  }
},

First put forward one or two classic examples

1. The following is implemented Click to select the loop card

<li v-for="(item,index) in filterAddress" v-bind:class="{&#39;check&#39;:index==currentIndex}" 
@click="currentIndex=index">
<!--其中currentIndex在js里需要定义-->

2. The following implements the click to select the fixed card

<ul>
  <li v-bind:class="{&#39;check&#39;:shippingMethod==1}" @click="shippingMethod=1">
   <p class="name">标准配送</p>
   <p class="price">Free</p>
  </li >
  <li v-bind:class="{&#39;check&#39;:shippingMethod==2}" @click="shippingMethod=2">
   <p class="name">高级配送</p>
   <p class="price">180</p>
  </li>
 </ul>
 <!--其中shippingMethod在js里需要定义-->

Digression: Since I am a novice, I will learn a little bit, and I will record the auxiliary pop-up box. How to write the mask layer

<p class="md-overlay" v-if="delFlag"></p>

vue2’s js syntax is posted for easy reference

1. Call the backend method

var _this = this;
this.$http.get("data/address.json").then(function(response){
    _this.addressList = response; //这里不能直接用this 此this非彼this 所以只能声明_this
}); 
//以下为ES6写法，就可以直接用this了
let _this = this;  //没用，就放这看看~
this.$http.get("data/cartData.json",{"id":123}).then(res=>{
  this.productList = res.data.result.list;
});

2.

forEachLoop

this.productList.forEach(function(item,index){
  if(typeof item.checked == 'undefined'){ 
  //如果item中没有checked属性 在item对象中添加checked属性，值为true
    _this.$set(item,"checked",true);//局部注册
    Vue.set(item,"checked",true);//全局注册
  }
});

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to php Chinese Other related articles online!

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