场景：

直接提供某个页面路径带了很多参数，然后退回到登陆页面，再登陆就回到该页面。

场景一：

登录过期后回到登陆页；

let num = 0 
service.interceptors.response.use((response) => {const res = response.data;if (res.code !== 200 && res.code !== '200' && !response.config.headers.apisass) {if (res.code == 2010) {num = num + 1;if (num == 1) {return (window.location.href = window.location.origin + '/#/login?backUrl=' + encodeURIComponent(window.location.href));}}if (res.code === 2011) {num = num + 1;if (num == 1) {return (window.location.href = window.location.origin + '/#/login?backUrl=' + encodeURIComponent(window.location.href));} 如果不判断就会多次拼接 window.location.origin是域名}if (showMsg) {Message({message: res.message || res.msg,type: 'error',duration: 2.5 * 1000});showMsg = false;setTimeout(() => {showMsg = true;}, 2000);}return Promise.reject(res.message || res.msg || 'ErrorError');} else {return res;}},
}

场景二：

没有登陆直接去

if (!role && to.path !== '/login' && !token) {Vue.prototype.$message.info('请登录');next('/login?backUrl=' + encodeURIComponent(window.location.href));return;}

登录处理：

   if (this.$route.query.backUrl) {window.location.href = decodeURIComponent(this.$route.query.backUrl);} else {this.$router.push('/loanDataBoard2');}