npm i element-ui -S

import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';

Vue.use(ElementUI);

<template>
  <div class="firstdemo">
    <el-form ref="form" :model="form" label-width="80px">
      <el-row type="flex" justify="center">
        <el-col :span="5">
          <el-form-item label="用户名">
            <el-input v-model="form.name"></el-input>
          </el-form-item>
        </el-col>
      </el-row>
      <el-row type="flex" justify="center">
        <el-col :span="5">
          <el-form-item label="密码">
            <el-input v-model="form.password"></el-input>
          </el-form-item>
        </el-col>
      </el-row>

      <el-row type="flex" justify="center">
        <el-col :span="5">
          <el-form-item>
            <el-button type="primary" @click="onSubmit">登陆</el-button>
            <el-button>注册</el-button>
          </el-form-item>
        </el-col>
      </el-row>
    </el-form>
  </div>
</template>
<script>
export default {
  name: "fisrtdemo",
  data() {
    return {
      form: {
        name: "",
        password: ""
      }
    };
  },
  methods: {
    onSubmit() {
      if (this.form.name == "admin" && this.form.password == "123456") {
       this.$message({
          message: '登陆成功',
          type: 'success'
        }); 
       this.$router.push({ path: "/Home" });
      }else{
         this.$message.error('登陆失败');
      }
    }
  }
};
</script>
<style lang="stylus" scoped></style>

　　　　　<!-- 声明式导航 应用于视图层 -->
        <router-link to='/foo'>to foo</router-link>
        <router-view></router-view>
        <!-- 编程式导航 应用于逻辑层-->
        <!-- router.push({path:'/foo'}) -->

index.js

import Vue from "vue";
import VueRouter from "vue-router";
import Home from "../views/Home.vue";
import login from "../views/login.vue";
Vue.use(VueRouter);

const routes = [
  {
    path: "/",
    name: "login",
    component: login
  },
  {
    path: "/Home",
    name: "home",
    component: Home
  },
  {
    path: "/about",
    name: "about",
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    component: () =>
      import(/* webpackChunkName: "about" */ "../views/About.vue")
  }
];

const router = new VueRouter({
  mode: "history",
  base: process.env.BASE_URL,
  routes
});

export default router;