vue3 非父子组件通信详解

<template>
  <div>
    <Home></Home>
    <button @click="addName">增加名字</button>
  </div>
</template>
 <script>
import Home from "./Home.vue";
import { computed } from "vue";
export default {
  name: "App",
  components: {
    Home,
  },
  provide() {
    return {
      name: "张三",
      age: 23,
      length: computed(() => this.names.length),
    };
  },
  data() {
    return {
      names: ["张三", "李四", "王五"],
    };
  },
  methods: {
    addName() {
      this.names.push("fuck you");
      console.log("hhhh");
    },
  },
};
</script>
 <style scoped>
</style>

<template>
  <div>
    <div>我是home</div>
    <home-content></home-content>
  </div>
</template>
 <script>
import HomeContent from "./HomeContent.vue";
export default {
  name: "Home",
  components: {
    HomeContent,
  },
};
</script>
 <style scoped>
</style>

<template>
  <div>HomeContent:{{ name }}--{{ age }}---{{ length }}</div>
</template>
 <script>
export default {
  inject: ["name", "age", "length"],
};
</script>
 <style lang="scss" scoped>
</style>