Vue组件通信：使用mixins进行组件复用通信

<!-- Parent.vue -->
<template>
  <div>
    <h1>Parent Component</h1>
    <ChildA :message="message" />
    <ChildB :message="message" />
  </div>
</template>

<script>
import MessageMixin from "@/mixins/MessageMixin";
import ChildA from "@/components/ChildA";
import ChildB from "@/components/ChildB";

export default {
  name: "Parent",
  mixins: [MessageMixin],
  components: {
    ChildA,
    ChildB
  },
  data() {
    return {
      message: ""
    };
  },
  methods: {
    updateMessage(newMessage) {
      this.message = newMessage;
    }
  }
};
</script>

// mixins/MessageMixin.js
export default {
  data() {
    return {
      inputMessage: ""
    };
  },
  methods: {
    sendMessage() {
      this.$emit("update-message", this.inputMessage);
      this.inputMessage = "";
    }
  }
};

<!-- ChildA.vue -->
<template>
  <div>
    <h2>Child A Component</h2>
    <input v-model="inputMessage" />
    <button @click="sendMessage">Send Message</button>
  </div>
</template>

<script>
export default {
  name: "ChildA",
  props: {
    message: {
      type: String,
      default: ""
    }
  },
  data() {
    return {
      inputMessage: ""
    };
  },
  methods: {
    sendMessage() {
      this.$emit("update-message", this.inputMessage);
      this.inputMessage = "";
    }
  }
};
</script>

<!-- ChildB.vue -->
<template>
  <div>
    <h2>Child B Component</h2>
    <p>{{ message }}</p><p><span>立即学习</span>“<a href="https://pan.quark.cn/s/cb6835dc7db1" style="text-decoration: underline !important; color: blue; font-weight: bolder;" rel="nofollow" target="_blank">前端免费学习笔记（深入）</a>”；</p>
  </div>
</template>

<script>
export default {
  name: "ChildB",
  props: {
    message: {
      type: String,
      default: ""
    }
  }
};
</script>