一篇文章带你了解Vue组件的创建和使用

       var com1 = Vue.extend({
// 通过 template 属性，指定了组件要展示的HTML结构
               template: '<h3>这是使用 Vue.extend 创建的组件</h3>'
            })

  Vue.component('myCom1', com1)

            Vue.component('mycom2', {
                template: '<div><h3>这是直接使用 Vue.component 创建出来的组件</h3>
<span>123</span></div>'
            })

<template id="tmpl">
            <div>
                <h1>这是通过 template 元素,在外部定义的组件结构</h1>
                <h4>好用,不错!</h4>
            </div>
        </template>

   Vue.component('mycom3', {
        template: '#tmpl'
    })

<template>
  <div class="hello">
    <ul>
      <li v-for="(user,index) in users" v-bind:key="index">{{ user }}</li>
    </ul>
  </div>
</template>

<script>
export default {
  name: "users",
  props: {
    users: {  //父组件中子标签自定义的名字
      type: Array,
      require: true
    }
  }
}
</script>

<style scoped>
 li{
   list-style-position: inside;
 }
</style>

<template>
  <div id="app">
    <img alt="Vue loGo" src="./assets/logo.png">
    <Users v-bind:users="users"> </Users>
  </div>
</template>

<script>
import Users from "@/components/users";
export default {
  name: 'App',
  data(){
    return {
      users: ['西安邮电','西安石油','西北政法','西安工业','西安财经']
    }
  },
  components: {
    Users,
  }
}
</script>

<template>
  <header>
    <h1 @click="changeTitle">{{ title }}</h1>
  </header>
</template>
<script>
export default {
  name: "Son",
  data(){
    return {
      title: 'Vue.js Demo'
    }
  },
  methods: {
    changeTitle(){
      this.$emit('titleChanged','西安邮电大学');
    }
  }
}
</script>

<style scoped>
 h1{
   background-color: greenyellow;
 }
</style>

<template>
  <div id="app">
    <Son v-on:titleChanged="updateTitle"></Son>
    <h2>{{ title }}</h2>
  </div>
</template>
<script>
import Son from "@/components/Son";
export default {
  name: "Father",
  data(){
    return {
      title: '传递的是一个值'
    }
  },
  methods: {
    updateTitle(e){
      this.title = e
    }
  },
  components:{
    Son,
  }
}
</script>