Use Nprogress.js progress bar vue project

NProgress is a slender add a progress bar at the top of the page tool, very light, very easy to use, inspired by Google, YouTube.
1, the installation

$ npm install --save nprogress 或者
$ yarn add nprogress

//用法
NProgress.start();
NProgress.done();

2,
router.js

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

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

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

In routing the page jump using the
same in the main.js

router.beforeEach((to, from, next) => {
if (to.path == '/login') {
    sessionStorage.removeItem('username');
  }
let user = sessionStorage.getItem('username');
if (!user && to.path != '/login') {
    next({path: '/login'})
  } else {
    NProgress.start();
    next()
  }
});

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

3.Vue use NProgress modify the colors
increase in App.vue in the style of:

  <style>
  #nprogress .bar {
      background: red !important; //自定义颜色
    }
</style>