How to use Vue-resource to complete interaction in VUE-JS Tutorial-php.cn

How to use Vue-resource to complete interaction in VUE

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Release： 2018-06-29 15:01:33

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This article mainly introduces the use of Vue-resource to complete interaction in VUE. The content is quite good. I will share it with you now and give it as a reference.

This article introduces the use of Vue-resource to complete interaction in VUE and shares it with everyone. The details are as follows

Using vue-resource

Introducing vue-resource

vue-resource is like $.ajax in jQuery, which is used to interact with the back-end data. vue-resource is a plug-in for vue, so Before we start using vue, we need to introduce the file vue-resource.js

<script src=&#39;js/vue.js&#39;></script>
<script src=&#39;js/vue-resource.js&#39;></script>

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Basic syntax

// 基于全局Vue对象使用http
Vue.http.get(&#39;/someUrl&#39;, [options]).then(successCallback, errorCallback);
Vue.http.post(&#39;/someUrl&#39;, [body], [options]).then(successCallback, errorCallback);


// 在一个Vue实例内使用$http
this.$http.get(&#39;/someUrl&#39;, [options]).then(successCallback, errorCallback);
this.$http.post(&#39;/someUrl&#39;, [body], [options]).then(successCallback, errorCallback);

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After sending the request, use the then method to process the response result. The then method has two parameters. The first parameter is the callback function when the response is successful, and the second parameter is the callback function when the response fails. .

options object

Instance:

GET request

In the following example , we make a summation function, the effect is as follows:

get method:

this.$http.get(&#39;/someUrl&#39;, [options]).then(function(response){  
  // 响应成功回调
}, function(response){  
  // 响应错误回调
});

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In this example, we prepared a php file, which mainly receives the parameters passed by the front desk through get, and calculates the sum of the two parameters. The code is as follows:

<?php
  $a=$_GET[&#39;a&#39;];
  $b=$_GET[&#39;b&#39;];
  echo $a+$b;
?>

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html code:

<p class="container" id="box" style="margin-top:100px">
  <input type="text" name="" id="" v-model="a" />+
  <input type="text" name="" id="" v-model="b" />
  =
  <input type="button" value="求和" class="btn btn-info" @click="add()"/>
</p>

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<script type="text/javascript">
  new Vue({
    el:"#box",
    data:{
      a:"",
      b:""
    },
    methods:{
      add:function(){
        this.$http.get("get.php",{
          "a":this.a,
          "b":this.b
        }).then(function(response){
          alert(response.data)
        },function(response){
          alert(response.status)
        }
        )
      }
    }
  })
</script>

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Description: response is the parameter returned by the background, which includes The following attributes:

POST request

<?php
  $a=$_POST[&#39;a&#39;];
  $b=$_POST[&#39;b&#39;];
  echo $a+$b;
?>

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    new Vue({
      el:"#box",
      data:{
        a:"",
        b:""
      },
      methods:{
        add:function(){
          this.$http.post("post.php",{
            "a":this.a,
            "b":this.b
          },{
            emulateJSON:true //POST请求需要将emulateJSON设置为true
          }).then(function(response){
            alert(response.data)
          },function(response){
            alert(response.status)
          }
          )
        }
      }
    })

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JSONP

The syntax of jsonp is similar to get and post, but the data passed is different. Next, we use jsonp to complete a Baidu search function.

1. First prepare an instance interface, which is Baidu’s search interface (we can find some interfaces ourselves for testing), as follows:

https://sp0.baidu.com /5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd=a&cb=show

2. Prepare layout

    <p class="container" id="box" style="margin-top:100px">
      <input type="text" placeholder="请输入搜索内容" />
      <ul>
        <li >22222</li>
      </ul>
      <p >暂无数据...</p>
    </p>

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##3. Function Description

When we enter the search content in the search box, the following list will display the words associated with the content we entered. Press the up and down keys of the keyboard to select words in the list up and down. When pressing the enter key, a search will be performed

4. Code implementation

First we prepare a myData array to store the associated words . t1 is the value entered in the input box, as follows

<input type="text" placeholder="请输入搜索内容" v-model="t1" />

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data:{
  myData:[],
  t1:""
}

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When entering content in the search box , execute a method, which is mainly used to send a request to obtain the associated words of the input content.

<input type="text" placeholder="请输入搜索内容" v-model="t1" @keyup="search()"/>

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     methods:{
        search:function(ev){this.$http.jsonp("https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su",{
            "wd":this.t1
          },{
            jsonp:"cb" //callback名字，默认是callback
          }).then(function(response){
            this.myData=response.data.s
          },function(response){
            alert(response.status)
          }
          )
　　　　　　　　　　}
        }

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At this point, the associated words we searched for can be displayed in the list. As shown below:

We can achieve the following. When pressing the up and down keys, select the word

    <p class="container" id="box" style="margin-top:100px">
      <input type="text" v-model="t1" @keyup="search($event)" @keydown.down.prevent="changeDown($event)" @keydown.up.prevent="changeup()"/>
      <ul>
        <li v-for="(value, index) in myData" :class="{gray:index==now}">{{value}}</li>
      </ul>
      <p v-show="myData.length==0">暂无数据...</p>
    </p>

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/*data数据*/
      data:{
        myData:[],
        t1:"",
        now:-1
      }
/*上下键的方法*/
        changeDown:function(){
            this.now++;
            if(this.now==this.myData.length){
              this.now=-1;
            }
            this.t1=this.myData[this.now];
        },
        changeup:function(){
            this.now--;
            if(this.now==-2){
              this.now=this.myData.length-1;
            }
            this.t1=this.myData[this.now];
        }

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Complete code:



  
    
    初识vue
    
    
  
  
    <p class="container" id="box" style="margin-top:100px">
      <input type="text" v-model="t1" @keyup="search($event)" @keydown.down.prevent="changeDown($event)" @keydown.up.prevent="changeup()"/>
      <ul>
        <li v-for="(value, index) in myData" :class="{gray:index==now}">{{value}}</li>
      </ul>
      <p v-show="myData.length==0">暂无数据...</p>
    </p>

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