npm i lib-flexible --save        // 载lib-flexible
npm install px2rem-loader        // 安装px2rem-loader

import ‘lib-flexible/flexible‘

<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">

  const cssLoader = {
    loader: ‘css-loader‘,
    options: {
      minimize: process.env.NODE_ENV === ‘production‘,
      sourceMap: options.sourceMap
    }
  }
  const px2remLoader = {
    loader: ‘px2rem-loader‘,
    options: {
      //一般设置75
      remUnit: 37.5 // 37.5按照375设计图尺寸在设计，75安装750设计图尺寸设计
    }
  }

function generateLoaders(loader, loaderOptions) {
    const loaders = options.usePostCSS ? [cssLoader, postcssLoader,px2remLoader] : [cssLoader,px2remLoader]

    if (loader) {
      loaders.push({
        loader: loader + ‘-loader‘,
        options: Object.assign({}, loaderOptions, {
          sourceMap: options.sourceMap
        })
      })
    }

    // Extract CSS when that option is specified
    // (which is the case during production build)
    if (options.extract) {
      return ExtractTextPlugin.extract({
        use: loaders,
        fallback: ‘vue-style-loader‘
      })
    } else {
      return [‘vue-style-loader‘].concat(loaders)
    }
  }

npm run dev