vue组件间值传递

夫传子

父组件代码

 子组件代码

 效果展示

<template>
    <h1>{{ msg }}</h1>
</template>

<script>
export default {
  name: 'HelloWorld',
  props: {
    msg:{
      type:String,
      default:""
    }
  }
}
</script>


<style >

</style>

<template>
  <div id="app">
    <img alt="Vue logo" src="./assets/logo.png">
    <MyComponent :msg="msg2"/>
  </div>
</template>

<script>
import MyComponent from './components/MyComponent.vue'

export default {
  name: 'App',
  data(){
    return{
      msg2:"Welcome222"
    }
  },
  components: {
    MyComponent
  }
}
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

子传父

父组件代码

 子组件代码

<template>
    <button @click="sendClickHandle">点击传递</button>
</template>

<script>

export default {
  name: 'HelloWorld',
  data(){
    return{
      msg:"Welcome222"
    }
  },
  methods:{
    sendClickHandle(){
      this.$emit("onEvent",this.msg)
    }
  }
}
</script>


<style >

</style>

<template>
  <div id="app">
    <img alt="Vue logo" src="./assets/logo.png">
    <p>{{ msg2 }}</p>
    <MyComponent @onEvent="getDataHandle"/>
  </div>
</template>

<script>
import MyComponent from './components/MyComponent.vue'

export default {
  name: 'App',
  data(){
    return{
      msg2:""
    }
  },
  components: {
    MyComponent
  },
  methods:{
    getDataHandle(data){
      this.msg2 = data
    }
  }
}
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>