vue之prop，emit数据传递示例

parent.vue

<template>
  <div>
    父亲: {{childInfo}}
    <child :parentInfo="parentMsg" @childInfo="handleChildMsg"/>
  </div>
</template>

<script>
  import child from "./ccc"

  export default {
    name: "parent",
    components: {
      child
    },
    data() {
      return {
        parentMsg: "来自父亲的话",
        childInfo: ""
      }
    },
    methods: {
      handleChildMsg(data) {
        this.childInfo = data;
      }
    },
  }
</script>

<style scoped>

</style>

child.vue

<template>
  <div>
    儿子:{{parentInfo}}
    <button @click="sendMsg">给父亲发送消息</button>
  </div>
</template>

<script>
  export default {
    name: "child",
    data() {
      return {
        childInfo: "儿子发来的消息"
      }
    },
    props: {//子接收数据
      parentInfo: {
        type: String,
        default: ""
      }
    },
    methods: {
      sendMsg() {
        this.$emit("childInfo", this.childInfo);
      }
    },
  }
</script>

<style scoped>

</style>