nuxt.js服务端渲染使用rem

1，下载flexible.js

可加载阿里的cdn文件 http://g.tbcdn.cn/mtb/lib-flexible/0.3.4/??flexible_css.js,flexible.js
或者将下载好的文件放到static也就是静态资源文件中

2，下载postcss-px2rem

npm install --save postcss-px2rem

3，配置nuxt.cofig.js

在head里加上

script: [
   { src: '/rem/flexible.js', type: 'text/javascript', charset: 'utf-8'}
],

在build里加上

postcss: [
   require('postcss-px2rem')({
     remUnit: 75
   })
],

完整的nuxt.config.js

module.exports = {
  mode: 'universal',
  /*
  ** Headers of the page
  */
  head: {
    title: process.env.npm_package_name || '',
    meta: [
      { charset: 'utf-8' },
      { name: 'viewport', content: 'width=device-width, initial-scale=1' },
      { hid: 'description', name: 'description', content: process.env.npm_package_description || '' }
    ],
    link: [
      { rel: 'icon', type: 'image/x-icon', href: '/favicon.ico' }
    ],
    script: [
      { src: '/rem/flexible.js', type: 'text/javascript', charset: 'utf-8' }
    ],

  },
  /*
  ** Customize the progress-bar color
  */
  loading: { color: '#fff' },
  /*
  ** Global CSS
  */
  css: [
    'element-ui/lib/theme-chalk/index.css',
    {src:'~assets/css/index.scss',lang:'scss'}
  ],
  /*
  ** Plugins to load before mounting the App
  */
  plugins: [
    '@/plugins/element-ui'
  ],
  /*
  ** Nuxt.js dev-modules
  */
  buildModules: [
  ],
  /*
  ** Nuxt.js modules
  */
  modules: [
  ],
  /*
  ** Build configuration
  */
  build: {
    extractCSS: { allChunks: true },
    transpile: [/^element-ui/],
    postcss: [
      require('postcss-px2rem')({
        remUnit: 75
      })
    ],

    /*
    ** You can extend webpack config here
    */
    extend(config, ctx) {
    }
  }
}

配置成功：