动态组件的使用

父组件 : 

<template>
    <div class="app">
      <!-- 动态组件 component -->
      <!-- is中的组件需要来自两个地方: 1.全局注册的组件 2.局部注册的组件 -->
      <!-- <component :is="tabs[currentIndex]"></component> -->
      <component name="why" 
                 :age="18"
                 @homeClick="homeClick"
                 :is="currentTab">
      </component>
    </div>
</template>

<script>
  import Home from './views/Home.vue'
  import About from './views/About.vue'
  import Category from './views/Category.vue'

  export default {
    components: {
      Home,
      About,
      Category
    },
    data() {
      return {
        tabs: ["home", "about", "category"],
        // currentIndex: 0
        currentTab: "home"
      }
    },
    methods: {
      itemClick(tab) {
        this.currentTab = tab
      },
      homeClick(payload) {
        console.log("homeClick:", payload)
      }
    }
  }
</script>

<style scoped>
  .active {
    color: red;
  }
</style>

子组件 : 

<template>
  <div>
    <h2>Home组件: {{ name }} - {{ age }}</h2>
    <button @click="homeBtnClick">homeBtn</button>
  </div>
</template>

<script>
  export default {
    props: {
      name: {
        type: String,
        default: ""
      },
      age: {
        type: Number,
        default: 0
      }
    },
    emits: ["homeClick"],
    methods: {
      homeBtnClick() {
        this.$emit("homeClick", "home")
      }
    }
  }
</script>

<style scoped>
</style>