一、在项目目录/src/components/下新建Test.vue文件,内容如下:

<template></template>

<template>
  <div id="firstVue">
        <input type="number" v-model.number="my_step" />
        <button @click="clickButton">Add</button>
        <p>{{total_res}}</p>
        <div id="result">{{result}}</div>
  </div>
</template>

<script></script>

<script>
  export default {
    name: 'Test.vue',
    data(){
      return {
        my_total: 0,
        my_step: 1,
        total_res: 1,
        result: ''
      }
    },
    methods:{
        clickButton:function(){
            this.my_total = this.my_total + this.my_step,
            this.total_res = this.my_total + this.my_step,
            this.result = '您点击了相加按钮,数值变为了'+this.my_total+'+'+this.my_step+'='+this.total_res
        }
    }
  }

</script>

<style></style>

<style>
  #firstVue{
    width: 300px;
    height: 200px;
    background-color: #2C3E50;
  }
  #firstVue input{
    width: 150px;
    height: 25px;
    background-color: #ffffff;
    padding: 5px 5px;
  }
  #firstVue button{
    width: 50px;
    height: 30px;
    border-color: #2C3E50;
  }
  #firstVue p{
    background-color: #FFFFFF;
  }
  #result{
    background-color: #FFFFFF;
    font-size: 12px;
    font-color: red;
  }
</style>

二、在/src/router/index.js加上页面路由:

import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import SayHi from '@/components/SayHi'
import Test from '@/components/Test'

Vue.use(Router)

export default new Router({
  routes: [
    {
      path: '/',
      name: 'HelloWorld',
      component: HelloWorld
    },
    {
      path: '/say_hi',
      name: 'SayHi',
      component: SayHi
    },
    {
      path: '/test',
      name: 'Test',
      component: Test
    }
  ]
})

三、执行npm  run dev,访问:http://localhost:8080/#/test,如下:

点击Add按钮,可以看到执行结果,如下图: