NProgress

npm install --save nprogress

router.js

import NProgress from 'nprogress'
import 'nprogress/nprogress.css'

router.beforeEach((to, from, next) => {
  NProgress.start()
  next()
})

router.afterEach(() => {
  NProgress.done()
})

App.vue 改变自定义颜色

#nprogress .bar {
  background: red !important;
}