Autoprefix webkit not present with webpack -p mode

[JiDai]

Hi,

I have a simple SCSS file for testing :

body{
  display:flex;
  flex:1;
}

I have this config in webpack :

{
  test: /\.scss$/,
  loaders: ['style', 'css?importLoaders=1','postcss', 'resolve-url', 'sass?sourceMap']
},

Output this with running webpack

body {\n  display: -webkit-flex;\n  display: -ms-flexbox;\n  display: flex;\n  -webkit-flex: 1;\n      -ms-flex: 1;\n          flex: 1;\n}\n\n/

But output this with webpack -p

body{display:-ms-flexbox;display:flex;-ms-flex:1;flex:1}

And here is my postcss.config.js file

module.exports = (ctx) => {
    return {
        map: ctx.env === 'development' ? 'inline' : false,
        plugins: {
            'autoprefixer': {
                'browsers': ['last 2 versions', 'ie > 9', 'iOS 8']
            }
        }
    }
}

Why webkit prefixes is not present with -p flag ?

webpack: 1.13.3
postcss: 5.2.5
postcss-loader: 1.1.0

[ai]

https://github.com/postcss/autoprefixer/blob/master/README.md#no-prefixes-in-production

[ai]

Please support this issue to fix this problem webpack-contrib/css-loader#281

[JiDai]

Thanks