Detailed explanation of vue.js data transfer and data distribution slot examples-JS Tutorial-php.cn

Detailed explanation of vue.js data transfer and data distribution slot examples

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Release： 2018-05-14 17:23:25

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This article mainly analyzes the relevant knowledge of vue.js data transfer and data distribution slot through code examples. Friends who are interested in this aspect can refer to it. I hope it can help everyone.

1. Data transfer between components

1. The parent component obtains the data of the child component

*The child component transfers its own data , sent to the parent

*vm.$emit(event name, data);

*v-on: @

Example usage: when the send button is clicked , "111" becomes "I am the data of the child component"

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>父级获取子级的数据</title>
  <script src="bower_components/vue/dist/vue.js"></script>
  <style>
  </style>
</head>
<body>
<p>
  <aaa>
  </aaa>
</p>
<template>
  <span>我是父级 -> {{msg}}</span>
  //自动调用get方法，@child-msg和下面的this.$emit('child-msg',this.a)相对应
  <bbb @child-msg="get"></bbb>
</template>
<template>
  <h3>子组件-</h3>
  <input type="button" value="send" @click="send">
</template>
<script>
  var vm=new Vue({
    el:'#box',
    data:{
      a:'aaa'
    },
    components:{
      'aaa':{
        data:function(){
          return {
            msg:111,
            msg2:'我是父组件的数据'
          }
        },
        template:'#aaa',
        methods:{
          //这里的msg实际上就是子组件传递给父组件的数据
          get:function(msg){
            this.msg=msg;
          }
        },
        components:{
          'bbb':{
            data:function(){
              return {
                a:'我是子组件的数据'
              }
            },
            template:'#bbb',
            methods:{
              send:function(){
                this.$emit('child-msg',this.a);
              }
            }
          }
        }
      }
    }
  });
</script>
</body>
</html>

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2. The child component obtains the data of the parent component

When calling the child component:

Within subcomponent:

props:[&#39;m&#39;,&#39;myMsg&#39;]
props:{
&#39;m&#39;:String,
&#39;myMsg&#39;:Number
　　　　　　　　}

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>自己获取父级的数据</title>
  <script src="bower_components/vue/dist/vue.js"></script>
  <style>
  </style>
</head>
<body>
<p>
  <p>{{a}}</p>
  <aaa>
    {{msg}}
  </aaa>
</p>

<template>
  <h1>11111</h1>
  <bbb :mmm="msg2" :my-msg="msg"></bbb>
</template>
<script>
  var vm=new Vue({
    el:&#39;#box&#39;,
    data:{
      a:&#39;a&#39;
    },
    components:{
      &#39;aaa&#39;:{
        data:function(){
          return {
            msg:111,
            msg2:&#39;我是父组件的数据&#39;
          }
        },
        template:&#39;#aa&#39;,
        components:{
          &#39;bbb&#39;:{
            props:{
              &#39;mmm&#39;:String,
              &#39;myMsg&#39;:Number
            },
            template:&#39;<h3>我是bbb组件->{{mmm}} <br> {{myMsg}}</h3>&#39;
          }
        }
      }
    }
  });

</script>
</body>
</html>

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Run result:

2. Content distribution:

Vue.js provides a way to mix the content of the parent component and the template of the child component itself: slot, used to occupy a position

1. Basic usage

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>slot保留原来的位置</title>
  <script src="bower_components/vue/dist/vue.js"></script>
  <style>
  </style>

</head>
<body>
<p>
  <aaa>
    <ul>
      <li>1111</li>
      <li>2222</li>
      <li>3333</li>
    </ul>
  </aaa>
  <hr>
  <aaa>
  </aaa>
</p>
<template>
  <h1>xxxx</h1>
  <slot>这是默认的情况</slot>
  <p>welcome vue</p>
</template>

<script>
  var vm=new Vue({
    el:&#39;#box&#39;,
    data:{
      a:&#39;aaa&#39;
    },
    components:{
      &#39;aaa&#39;:{
        template:&#39;#aaa&#39;
      }
    }
  });

</script>
</body>
</html>

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Running result: The content in the ul tag is not overwritten. If slot is not used, the content in the ul tag will be overwritten

2. The name attribute of the slot

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>slot中name属性的使用</title>
  <script src="bower_components/vue/dist/vue.js"></script>
  <style>
  </style>
</head>
<body>
<p>
  <aaa>
    <ul slot="ul-slot">　　　　//这里slot的名字要与下面slot中name属性相对应
      <li>1111</li>
      <li>2222</li>
      <li>3333</li>
    </ul>
    <ol slot="ol-slot">　　　　//用法同上
      <li>111</li>
      <li>222</li>
      <li>333</li>
    </ol>
  </aaa>
  <hr>
  <aaa>
  </aaa>
</p>
<template>　　
  <h1>xxxx</h1>
  <slot name="ol-slot">这是默认的情况</slot>　　　　　　//设置name属性，给slot命名
  <p>welcome vue</p>
  <slot name="ul-slot">这是默认的情况2</slot>
</template>

<script>
  var vm=new Vue({
    el:&#39;#box&#39;,
    data:{
      a:&#39;aaa&#39;
    },
    components:{
      &#39;aaa&#39;:{
        template:&#39;#aaa&#39;
      }
    }
  });

</script>
</body>
</html>

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Running results:

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