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How to implement data distribution slot in vue.js

亚连Original: 2018-06-11 14:12:211642browse

This article 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.

1. Data transfer between components

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

*The child component sends its own data to 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.$emit(&#39;child-msg&#39;,this.a)相对应
  <bbb @child-msg="get"></bbb>
</template>
<template>
  <h3>子组件-</h3>
  <input type="button" value="send" @click="send">
</template>
<script>
  var vm=new Vue({
    el:&#39;#box&#39;,
    data:{
      a:&#39;aaa&#39;
    },
    components:{
      &#39;aaa&#39;:{
        data:function(){
          return {
            msg:111,
            msg2:&#39;我是父组件的数据&#39;
          }
        },
        template:&#39;#aaa&#39;,
        methods:{
          //这里的msg实际上就是子组件传递给父组件的数据
          get:function(msg){
            this.msg=msg;
          }
        },
        components:{
          &#39;bbb&#39;:{
            data:function(){
              return {
                a:&#39;我是子组件的数据&#39;
              }
            },
            template:&#39;#bbb&#39;,
            methods:{
              send:function(){
                this.$emit(&#39;child-msg&#39;,this.a);
              }
            }
          }
        }
      }
    }
  });
</script>
</body>
</html>

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

When calling the child component:

082e86ca6bd8dd0591be1fd79a617dc2eaf2859ee44b5934442adb5b52b718da

Within subcomponent:

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

<!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>

Run result:

two , Content distribution:

Vue.js provides a way to mix the content of the parent component and the child component's own template: 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>

Run 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. slot The name attribute

<!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>

Running results:

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

Realize the linkage between the input box and the drop-down box

Realize the synchronization of the click-down menu content in the input box in JS

How to use cli to reconstruct multi-page scaffolding in vue

How to change the size of objects by dragging in JS

Using cli mui in Vue related to area scrolling issues

Online paid courses in vue (detailed tutorial)

Comparison of the use of express and koa (detailed tutorial)

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