element ui 父子传值 对象_「Vue学习记录三」组件之间传值

<template>
    <div id="children">
        <h2>子组件</h2>
        <br>
        <h3>父组件向子组件传值:  {
    {msg}}</h3>
    </div>
</template>
 
<script>
    export default {
        name:'Children',
// 要接受父组件传递的参数
        props: {
            msg: {
                type: Number,
            },
        },
    }
</script>
 
<style scoped>
#children{
    margin: 30px;
    border: 2px solid red;
    color: red;
}
</style>

<template>
  <h1>父组件</h1>
 <!-- 注意  :msg 后面是一个对象，需要写冒号，如果省略：就是一个字符串 -->
  <children :msg="msgval"></children>
</template>
 
<script>
//引入子组件
import Children from './components/Children.vue'
 
export default {
  name: 'App',
  data() {
    return {
      msgval: 20
    }
  },
  components: {
    Children
  },
}
</script>
 
<style>
#app {
  text-align: center;
  color: #2c3e50;
  margin-