vue中的登陆拦截

首先说思路，通过在如有规则中使用meta属性，再配合钩子函数beforeEach，实现登陆拦截功能

router.js:

import Vue from 'vue'
import Router from 'vue-router'
import Login from '@/pages/login'
import Home from '@/pages/home'

Vue.use(Router)

export default new Router({
  routes: [
    {
      path: '/login',
      name: 'L',
      component: Login
    },
    {
      path: '/home',
      name: 'H',
      component: Home,
      meta:{  //将home页设置为需要登录验证
        requireAuth: true
      }
    }
  ]
})

使用全局的路由前置守卫

main.js:

router.beforeEach((to,from,next)=>{
    if (to.meta.requireAuth) {  
        if (localStorage.user) {  
            next();
        }
        else {
            next({
                path: '/login',
                query: {redirect: to.fullPath}  
            })
        }
    }
    else {
        next();
    }
})

登陆页面的简单实现，如果用户登陆，就把用户信息存到localstorage中，在前置的路由守卫中通过判断localstorage中是否有用户信息，实现登陆拦截功能

login.vue:

<template>
    <div class="box">
        <div class="login" @click="select(0)">login</div>
        <div class="sign" @click="select(1)">sign</div>
        <div class="bb bb-active"></div>
        <div class="bb"></div>
        <div class="login-box" v-if="isLogin">
            <el-input v-model="name" placeholder="name"></el-input>
            <el-input v-model="pwd" placeholder="password"></el-input>
        </div>
        <div v-else>
            sign
        </div>
        <span class="btn" v-show="btnFlag" @click="goLogin">login</span>
        <span class="dis-btn" v-show="!btnFlag">login</span>
    </div>
</template>

<script>
import md5 from 'js-md5'
export default {
    name: 'login',
    data(){
        return {
            isLogin: true,
            name: '',
            pwd: '',
            btnFlag: false
        }
    },
    methods:{
        select(index){
            if(index == 0){
                this.isLogin = true
            } else{
                this.isLogin = false
            }
            let bbList = document.getElementsByClassName('bb')
            for(let i=0;i<bbList.length;i++){
                if(i == index){
                    bbList[i].className = 'bb bb-active';
                }else{
                    bbList[i].className = 'bb';
                }
            }
        },
        goLogin(){
            this.pwd = md5(this.pwd)
            alert(this.pwd)
            let userObj = {
                name: this.name,
                pwd: this.pwd
            }
            localStorage.setItem("user",JSON.stringify(userObj))
            this.$router.push('/home')
        }
    },
    watch:{
        name(val,newVal){
            if(this.name && this.pwd){
                this.btnFlag = true
            }else{
                this.btnFlag = false
            }
        },
        pwd(val,newVal){
            if(this.name && this.pwd){
                this.btnFlag = true
            }else{
                this.btnFlag = false
            }
        }
    },
    beforeCreate(){
        document.querySelector('body').setAttribute('style', 'background-color:#09f')
    },
    beforeDestroy(){
        document.querySelector('body').removeAttribute('style')
    }   
}
</script>

<style lang="less" scoped>
.box{
    overflow-y: none;
    width: 400px;
    margin: 100px auto;
    background: white;
    border-radius: 5px;
    padding-bottom: 20px;

    .login,.sign{
        float: left;
        width: 50%;
        height: 50px;
        line-height: 50px;
        border:1px solid #E4E7ED;
        box-sizing: border-box;
        cursor: pointer;
    }

    .sign{
        border-left: 0;
    }

    .login{
        border-right: 0;
    }

    .bb{
        float: left;
        width: 50%;
        height: 2px;
        background: transparent;
        margin-bottom: 20px;
    }

    .bb-active{
        background: #09f;
    }

    .el-input{
        width: 80%;
        margin: 10px 0 10px 0;
    }

    .btn,.dis-btn{
        font-size:18px;
        color: white;
        line-height: 50px;
        margin: 20px auto; 
        border-radius: 10px;
        display: block;
        width: 80%;
        cursor: pointer;    
    }

    .btn{
        background: #09f;
    }

    .dis-btn{
        background: #eee;
    }
}
</style>

end