在用vue做服务端渲染的时候需要对移动端做适配所以要用到postcss-2rem插件, 

首先下载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

将下载好的文件放到static也就是静态资源文件中

下载postcss-px2rem

npm install --save postcss-px2rem

配置nuxt.cofig.js

在head里加上

script: [
   { src: '/vipService/js/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 = {
  /*
  ** Headers of the page
  */
  head: {
    title: 'starter',
    meta: [
      { charset: 'utf-8' },
      { name: 'viewport', content: 'width=device-width, initial-scale=1' },
      { hid: 'description', name: 'description', content: 'Nuxt.js project' }
    ],
    link: [
      { rel: 'icon', type: 'image/x-icon', href: '/favicon.ico' }
    ],
    script: [
      { src: '/vipService/js/flexible.js', type: 'text/javascript', charset: 'utf-8'}
    ],
  },
  /*
  ** Global CSS
  */
  css: [
    '~/assets/css/main.css'
    // {src: '~/assets/css/main.css', lang: 'less'}
  ],
  /*
  ** Add axios globally
  */
  build: {
    vendor: ['axios', '~/plugins/tools.js'],
    postcss: [
      require('postcss-px2rem')({
        remUnit: 75
      })
    ],
    /*
    ** Run ESLINT on save
    */
    extend (config, ctx) {
      if (ctx.isClient) {
        config.module.rules.push({
          enforce: 'pre',
          test: /\.(js|vue)$/,
          loader: 'eslint-loader',
          exclude: /(node_modules)/
        })
      }
    }
  }
}

测试

remUnit: 75 表示1rem=75px

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