vue如何根据网站路由判断页面主题色详解

import Vue from 'vue'
import App from './App'
import router from './router'
import axios from 'axios'
import MintUI from 'mint-ui'
import { Indicator } from 'mint-ui'
import { getUrls } from '@/util/utils'
import 'mint-ui/lib/style.css'
import './css/index.css'
Vue.use(MintUI)
//添加请求拦截器 loading
axios.interceptors.request.use(function (config) {
 Indicator.open({
 text: '加载中...',
 spinnerType: 'fading-circle'
 })
 return config
}),function (error) {
 Indicator.close()
 return Promise.reject(error)
}
axios.interceptors.response.use(function (config) {
 Indicator.close()
 return config
}),function (error) {
 return Promise.reject(error)
}
 
Vue.prototype.$http = axios
Vue.prototype.getUrls = getUrls
router.beforeEach((to,from,next) => {
 if (sessionStorage.getItem('basecolor')) {
 document.documentElement.style.setProperty("--color", sessionStorage.getItem('basecolor'))
 next()
 }
})
Vue.config.productionTip = false
 
/* eslint-disable no-new */
new Vue({
 el: '#app',
 router,
 components: { App },
 template: '<App/>'
})

export function getUrls() {
 let colorValue
 let url = window.location.href
 let urlArr = url.split('?')
 let appU = urlArr[0].split('/')
 let styles = getComputedStyle(document.documentElement)
 if (appU[appU.length-1] === 'login') {
 colorValue = styles.getPropertyValue('--OLAY')
 sessionStorage.setItem('basecolor', colorValue)
 this.$router.push('/login')
 } else if (appU[appU.length-1] === 'resetPassword') {
 colorValue = styles.getPropertyValue('--pampers')
 sessionStorage.setItem('basecolor', colorValue)
 this.$router.push('/login')
 }
}

<template>
 <div id="app">
 <router-view/>
 </div>
</template>
 
<script>
 export default {
 name: 'App',
 created() {
  this.getUrls()
 }
}
</script>
 
<style>
 :root {
 --OLAY: rgb(237,202,138);
 --pampers: rgb(5,183,185);
 --color: #fff;
 }
 #app{
 height: 100%;
 }
</style>