vue 模板下只能有一个跟节点 根节点一定要是个div

<template>
  <div>
简单说就是里面只能有一个跟的div

button1.vue

<template>
  <div>
    <Button>Default</Button>
    <Button type="primary">Primary</Button>
    <Button type="dashed">Dashed</Button>
    <Button type="text">Text</Button>
    <br><br>
    <Button type="info">Info</Button>
    <Button type="success">Success</Button>
    <Button type="warning">Warning</Button>
    <Button type="error">Error</Button>
  </div>
</template>

<script>
    export default {
        name: "button1"
    }
</script>

<style scoped>

</style>

　　

app.vue

<template>
  <div id="app">
    <img src="./assets/logo.png">
    <br><br>

    <button1></button1>
    <router-view/>
  </div>
</template>

<script>
import button1 from './components/button1';
export default {
  name: 'App',
  components: {
    button1
  }
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>