Error: No PostCSS Config found in...

在项目根目录新建postcss.config.js文件，并对postcss进行配置：

module.exports = { 
  plugins: { 
    'autoprefixer': {browsers: 'last 5 version'} 
  } 
}

less: Inline JavaScript is not enabled. Is it set in your options?

less-loader加一个options

{
    loader: "less-loader", options: {javascriptEnabled: true}
}