<template>
<div class="hello">

<h1>{{ msg }}</h1>
<h2>Essential Links</h2>
<ul>
  <li>
    <a
      href="https://vuejs.org"
      target="_blank"
    >
      Core Docs
    </a>
  </li>
  <li>
    <a
      href="https://forum.vuejs.org"
      target="_blank"
    >
      Forum
    </a>
  </li>
  <li>
    <a
      href="https://chat.vuejs.org"
      target="_blank"
    >
      Community Chat
    </a>
  </li>
  <li>
    <a
      href="https://twitter.com/vuejs"
      target="_blank"
    >
      Twitter
    </a>
  </li>
  <br>
  <li>
    <a
      href="http://vuejs-templates.github.io/webpack/"
      target="_blank"
    >
      Docs for This Template
    </a>
  </li>
</ul>
<h2>Ecosystem</h2>
<ul>
  <li>
    <a
      href="http://router.vuejs.org/"
      target="_blank"
    >
      vue-router
    </a>
  </li>
  <li>
    <a
      href="http://vuex.vuejs.org/"
      target="_blank"
    >
      vuex
    </a>
  </li>
  <li>
    <a
      href="http://vue-loader.vuejs.org/"
      target="_blank"
    >
      vue-loader
    </a>
  </li>
  <li>
    <a
      href="https://github.com/vuejs/awesome-vue"
      target="_blank"
    >
      awesome-vue
    </a>
  </li>
</ul>
<div id="showTest">
  <h1>{{msg2}}</h1>
  <h1>{{details()}}</h1>
</div>

</div>
</template>

<script>

import Vue from 'vue'

export default {
name: 'HelloWorld',
data () {

return {
  msg: 'Welcome to Your Vue.js App'
}

}
}

var vm = new Vue({
el: '#showTest',
data () {

return {
  msg2: 'this is only a test',
  state: 'is it success ?'
}

},
methods: {

details: function () {
  return this.state + ' you are right !!!! '
}

}
})

// Vue.use({
// vm
// })
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h1,
h2 {
font-weight: normal;
}
ul {
list-style-type: none;
padding: 0;
}
li {
display: inline-block;
margin: 0 10px;
}
a {
color: #42b983;
}
</style>

显示错误说 'vm' is assigned a value but never used 所以我想知道如何引入自己创建的Vue对象