nuxt.config.js

const routerBase =
  process.env.DEPLOY_ENV === 'GH_PAGES'
    ? {
        router: {
          base: '/covid_chart/'
        }
      }
    : {}

export default {
  mode: 'spa',
  /*
   ** Headers of the page
   */
  ...routerBase,
  head: {
    title: process.env.npm_package_name || '',
    meta: [
      { charset: 'utf-8' },
      { name: 'viewport', content: 'width=device-width, initial-scale=1' },
      {
        hid: 'Covid19 Chart on Nuxt.js with Chart.js',
        name: 'Covid19 Chart',
        content: process.env.npm_package_description || ''
      }
    ],
    link: [
      { rel: 'icon', type: 'image/x-icon', href: '/favicon.ico' },
      { rel: 'stylesheet', href: 'https://fonts.googleapis.com/css?family=Roboto&display=swap' }
    ]
  },
  /*
   ** Customize the progress-bar color
   */
  loading: { 
    name: 'cube-grid',
    color: '#fff',
    background: '#333'
  },
  /*
    Global CSS
   */
  css: [
    '~/css/main.scss'
  ],
  /*
   ** Plugins to load before mounting the App
   */
  plugins: [],
  /*
   ** Nuxt.js dev-modules
   */
  buildModules: [
    // Doc: https://github.com/nuxt-community/eslint-module
    '@nuxtjs/eslint-module'
  ],
  /*
   ** Nuxt.js modules
   */
  modules: [
    // Doc: https://axios.nuxtjs.org/usage
    '@nuxtjs/axios',
    '@nuxtjs/pwa'
  ],
  /*
   ** Axios module configuration
   ** See https://axios.nuxtjs.org/options
   */
  axios: {},
  /*
   ** Build configuration
   */
  build: {
    /*
     ** You can extend webpack config here
     */
    extend(config, ctx) {}
  },
  render: {
    bundleRenderer: {
      shouldPreload: (file, type) => {
        return ['script', 'style', 'font'].includes(type)
      }
    }
  }
}