在VueJS中传递来自事件的数据

// 子组件 ChildComponent
<template>
  <button @click="sendData">传递数据</button>
</template>

<script>
export default {
  methods: {
    sendData() {
      const data = '这是要传递的数据';
      this.$emit('custom-event', data);
    }
  }
}
</script>

// 父组件 ParentComponent
<template>
  <div>
    <child-component @custom-event="handleData"></child-component>
    <p>接收到的数据：{{ receivedData }}</p>
  </div>
</template>

<script>
import ChildComponent from './ChildComponent.vue';

export default {
  components: {
    ChildComponent
  },
  data() {
    return {
      receivedData: ''
    }
  },
  methods: {
    handleData(data) {
      this.receivedData = data;
    }
  }
}
</script>