Optimize build and update

config/webpack.config.demo.js

 const path = require('path');
 const CopyWebpackPlugin = require('copy-webpack-plugin');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
+const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
 
 const isProduction = process.env.NODE_ENV === 'production';
 const scriptFileName = 'driver-demo.min.js';
@@ -15,7 +16,7 @@ module.exports = {
     './src/index.js',
   ],
   output: {
-    path: path.join(__dirname, '/dist/demo'),
+    path: path.join(__dirname, '/../dist/demo'),
     publicPath: '/dist/demo/',
     filename: scriptFileName,
     libraryTarget: 'umd',
@@ -55,6 +56,20 @@ module.exports = {
       filename: styleFileName,
       allChunks: true,
     }),
+    new OptimizeCssAssetsPlugin({
+      assetNameRegExp: /\.min\.css$/g,
+      // eslint-disable-next-line global-require
+      cssProcessor: require('cssnano'),
+      cssProcessorPluginOptions: {
+        preset: [
+          'default',
+          {
+            discardComments: { removeAll: true },
+          },
+        ],
+      },
+      canPrint: true,
+    }),
     new CopyWebpackPlugin([
       './demo/images/separator.png',
       './demo/images/driver.png',

config/webpack.config.prod.js

 const path = require('path');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
+const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
 
 module.exports = {
   mode: 'production',
@@ -8,7 +9,7 @@ module.exports = {
     './src/index.js',
   ],
   output: {
-    path: path.join(__dirname, '/dist'),
+    path: path.join(__dirname, '/../dist'),
     publicPath: '/dist/',
     filename: 'driver.min.js',
     libraryTarget: 'umd',
@@ -48,6 +49,20 @@ module.exports = {
       filename: 'driver.min.css',
       allChunks: true,
     }),
+    new OptimizeCssAssetsPlugin({
+      assetNameRegExp: /\.min\.css$/g,
+      // eslint-disable-next-line global-require
+      cssProcessor: require('cssnano'),
+      cssProcessorPluginOptions: {
+        preset: [
+          'default',
+          {
+            discardComments: { removeAll: true },
+          },
+        ],
+      },
+      canPrint: true,
+    }),
   ],
   stats: {
     colors: true,

dist/demo/driver-demo.min.css

-*{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;padding:0}*,:after,:before{box-sizing:border-box}body,html{position:relative;margin:0;width:100%;height:100%}body{padding-top:1px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.4;color:#fff;background-color:#2e2e30;overflow-x:hidden}label{display:block;margin-bottom:8px;font-size:14px;font-weight:500;cursor:pointer}p{margin-top:0;margin-bottom:20px;line-height:1.5}.hr,hr{display:block;margin:30px 0;border:0;border-bottom:1px solid #eaeaea;height:1px}.hr.hr__fancy,hr.hr__fancy{background:url("./separator.png") repeat-y;height:5px;background-size:cover}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:12px;font-weight:700;line-height:1.2}a,a:focus,a:visited{color:#fff;text-decoration:none;font-weight:600}.form-control{display:block;width:100%;background-color:#f9f9f9;padding:12px;border:1px solid #ddd;border-radius:2.5px;font-size:14px;-webkit-appearance:none;appearance:none;outline:none;margin-bottom:24px}.h1,h1{font-size:32px}.h2,h2{font-size:24px}.h3,h3{font-size:20px}.h4,h4{font-size:18px}.h5,h5{font-size:16px}.h6,h6{font-size:14px}ol li,ul li{list-style-type:none;line-height:1.5;margin-bottom:3px}blockquote{background:#f5f3f1;padding:10px;margin-bottom:35px;border-radius:10px}.top-20{margin-top:20px}.top-30{margin-top:30px}.zero-bottom{margin-bottom:0}.zero-top{margin-top:0}.text-center{text-align:center}div#driver-popover-item{display:none;position:absolute;background:#fff;color:#2d2d2d;margin:0;padding:15px;border-radius:5px;min-width:250px;max-width:300px;box-shadow:0 1px 10px rgba(0,0,0,.4);z-index:1000000000}div#driver-popover-item .driver-popover-tip{border:5px solid #fff;content:"";position:absolute}div#driver-popover-item .driver-popover-tip.bottom{bottom:-10px;border-top-color:#fff;border-right-color:transparent;border-bottom-color:transparent;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.left{left:-10px;top:10px;border-top-color:transparent;border-right-color:#fff;border-bottom-color:transparent;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.right{right:-10px;top:10px;border-top-color:transparent;border-right-color:transparent;border-bottom-color:transparent;border-left-color:#fff}div#driver-popover-item .driver-popover-tip.top{top:-10px;border-top-color:transparent;border-right-color:transparent;border-bottom-color:#fff;border-left-color:transparent}div#driver-popover-item .driver-popover-footer{display:block;clear:both;margin-top:5px}div#driver-popover-item .driver-popover-footer button{display:inline-block;padding:3px 10px;border:1px solid #d4d4d4;text-decoration:none;text-shadow:1px 1px 0 #fff;color:#2d2d2d;font:11px/normal sans-serif;cursor:pointer;outline:0;background-color:#f1f1f1;border-radius:2px;zoom:1;margin:10px 0 0;line-height:1.3}div#driver-popover-item .driver-popover-footer button.driver-disabled{color:gray;cursor:default;pointer-events:none}div#driver-popover-item .driver-popover-footer .driver-close-btn{float:left}div#driver-popover-item .driver-popover-footer .driver-btn-group{float:right}div#driver-popover-item .driver-popover-title{font:19px/normal sans-serif;margin:0 0 5px;font-weight:700;display:block;position:relative;line-height:1.5;zoom:1}div#driver-popover-item .driver-popover-description{margin-bottom:0;font:14px/normal sans-serif;line-height:1.5;color:#2d2d2d;font-weight:400;zoom:1}.driver-stage-no-animation{-webkit-transition:none!important;-moz-transition:none!important;-ms-transition:none!important;-o-transition:none!important;transition:none!important;background:transparent!important;outline:5000px solid rgba(0,0,0,.75)}div#driver-page-overlay{background:#000;position:fixed;bottom:0;right:0;display:block;width:100%;height:100%;zoom:1;filter:alpha(opacity=75);opacity:.75;z-index:100002!important}div#driver-highlighted-element-stage,div#driver-page-overlay{top:0;left:0;-webkit-transition:all .4s;-moz-transition:all .4s;-ms-transition:all .4s;-o-transition:all .4s;transition:all .4s}div#driver-highlighted-element-stage{position:absolute;height:50px;width:300px;background:#fff;z-index:100003!important;display:none;border-radius:2px}.driver-highlighted-element{z-index:100004!important}.driver-position-relative{position:relative!important}.driver-fix-stacking{z-index:auto!important;opacity:1!important;-webkit-transform:none!important;-moz-transform:none!important;-ms-transform:none!important;-o-transform:none!important;transform:none!important;-webkit-filter:none!important;-moz-filter:none!important;-ms-filter:none!important;-o-filter:none!important;filter:none!important;-webkit-perspective:none!important;-moz-perspective:none!important;-ms-perspective:none!important;-o-perspective:none!important;perspective:none!important;-webkit-transform-style:flat!important;-moz-transform-style:flat!important;-ms-transform-style:flat!important;transform-style:flat!important;-webkit-transform-box:border-box!important;-moz-transform-box:border-box!important;-ms-transform-box:border-box!important;-o-transform-box:border-box!important;transform-box:border-box!important;will-change:unset!important}img.emoji{height:1em;width:1em;margin:0 .05em 0 .1em;vertical-align:-.1em}.brand,.brand img{position:relative}.brand img{height:67px;top:10px}.page-wrap{max-width:550px;margin:50px auto;background:#fff;padding:10px 30px;border-radius:5px;color:#1f1f1f}.page-wrap a,.page-wrap a:focus,.page-wrap a:visited{color:#1f1f1f;text-decoration:underline}.page-wrap a.btn__dark{text-decoration:none;color:#fff;background-color:#f44336;padding:0 18px;height:40px;line-height:40px;border-radius:8px;cursor:pointer;transition:background-color .2s,color .2s;font-weight:500;width:195px;font-size:17px;display:inline-block;margin-top:2px}.page-wrap a.btn__run-demo{text-decoration:none;background:#f54336;padding:5px;border-radius:20px;color:#fff;display:block;margin:15px 0 10px;text-align:center}section{margin-bottom:30px}.section__header{margin:10px 0 20px;text-align:center;display:block;padding:10px}.section__header h1{font-size:55px}.section__header h1 .emoji{font-size:45px;top:-4px;margin-right:3px;position:relative}.section__header .tagline{max-width:450px;margin:0 auto 25px;text-align:center}.section__examples .section__example{margin-bottom:20px}.section__examples #creation-input{margin-top:20px}.section__examples input{padding:10px;background-color:#fafbfc;border:3px solid #e1e4e8;border-radius:3px;box-shadow:inset 0 0 10px rgba(27,31,35,.05);margin-bottom:0;margin-top:7px}.position-btns a{text-decoration:none;font-size:13px;padding:10px 15px;background:#f54336;color:#fff!important;border-radius:6px}
\ No newline at end of file
+*{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;padding:0}*,:after,:before{box-sizing:border-box}body,html{position:relative;margin:0;width:100%;height:100%}body{padding-top:1px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol;font-size:16px;line-height:1.4;color:#fff;background-color:#2e2e30;overflow-x:hidden}label{display:block;margin-bottom:8px;font-size:14px;font-weight:500;cursor:pointer}p{margin-top:0;margin-bottom:20px;line-height:1.5}.hr,hr{display:block;margin:30px 0;border:0;border-bottom:1px solid #eaeaea;height:1px}.hr.hr__fancy,hr.hr__fancy{background:url(separator.png) repeat-y;height:5px;background-size:cover}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:12px;font-weight:700;line-height:1.2}a,a:focus,a:visited{color:#fff;text-decoration:none;font-weight:600}.form-control{display:block;width:100%;background-color:#f9f9f9;padding:12px;border:1px solid #ddd;border-radius:2.5px;font-size:14px;-webkit-appearance:none;appearance:none;outline:none;margin-bottom:24px}.h1,h1{font-size:32px}.h2,h2{font-size:24px}.h3,h3{font-size:20px}.h4,h4{font-size:18px}.h5,h5{font-size:16px}.h6,h6{font-size:14px}ol li,ul li{list-style-type:none;line-height:1.5;margin-bottom:3px}blockquote{background:#f5f3f1;padding:10px;margin-bottom:35px;border-radius:10px}.top-20{margin-top:20px}.top-30{margin-top:30px}.zero-bottom{margin-bottom:0}.zero-top{margin-top:0}.text-center{text-align:center}div#driver-popover-item{display:none;position:absolute;background:#fff;color:#2d2d2d;margin:0;padding:15px;border-radius:5px;min-width:250px;max-width:300px;box-shadow:0 1px 10px rgba(0,0,0,.4);z-index:1000000000}div#driver-popover-item .driver-popover-tip{border:5px solid #fff;content:"";position:absolute}div#driver-popover-item .driver-popover-tip.bottom{bottom:-10px;border-color:#fff transparent transparent}div#driver-popover-item .driver-popover-tip.bottom.position-center{left:49%}div#driver-popover-item .driver-popover-tip.bottom.position-right{right:20px}div#driver-popover-item .driver-popover-tip.left{left:-10px;top:10px;border-color:transparent #fff transparent transparent}div#driver-popover-item .driver-popover-tip.left.position-center{top:46%}div#driver-popover-item .driver-popover-tip.left.position-bottom{top:auto;bottom:20px}div#driver-popover-item .driver-popover-tip.right{right:-10px;top:10px;border-color:transparent transparent transparent #fff}div#driver-popover-item .driver-popover-tip.right.position-center{top:46%}div#driver-popover-item .driver-popover-tip.right.position-bottom{top:auto;bottom:20px}div#driver-popover-item .driver-popover-tip.top{top:-10px;border-color:transparent transparent #fff}div#driver-popover-item .driver-popover-tip.top.position-center{left:49%}div#driver-popover-item .driver-popover-tip.top.position-right{right:20px}div#driver-popover-item .driver-popover-footer{display:block;clear:both;margin-top:5px}div#driver-popover-item .driver-popover-footer button{display:inline-block;padding:3px 10px;border:1px solid #d4d4d4;text-decoration:none;text-shadow:1px 1px 0 #fff;color:#2d2d2d;font:11px/normal sans-serif;cursor:pointer;outline:0;background-color:#f1f1f1;border-radius:2px;zoom:1;margin:10px 0 0;line-height:1.3}div#driver-popover-item .driver-popover-footer button.driver-disabled{color:grey;cursor:default;pointer-events:none}div#driver-popover-item .driver-popover-footer .driver-close-btn{float:left}div#driver-popover-item .driver-popover-footer .driver-btn-group{float:right}div#driver-popover-item .driver-popover-title{font:19px/normal sans-serif;margin:0 0 5px;font-weight:700;display:block;position:relative;line-height:1.5;zoom:1}div#driver-popover-item .driver-popover-description{margin-bottom:0;font:14px/normal sans-serif;line-height:1.5;color:#2d2d2d;font-weight:400;zoom:1}.driver-stage-no-animation{-webkit-transition:none!important;-moz-transition:none!important;-ms-transition:none!important;-o-transition:none!important;transition:none!important;background:transparent!important;outline:5000px solid rgba(0,0,0,.75)}div#driver-page-overlay{background:#000;position:fixed;bottom:0;right:0;display:block;width:100%;height:100%;zoom:1;filter:alpha(opacity=75);opacity:.75;z-index:100002!important}div#driver-highlighted-element-stage,div#driver-page-overlay{top:0;left:0;-webkit-transition:all .4s;-moz-transition:all .4s;-ms-transition:all .4s;-o-transition:all .4s;transition:all .4s}div#driver-highlighted-element-stage{position:absolute;height:50px;width:300px;background:#fff;z-index:100003!important;display:none;border-radius:2px}.driver-highlighted-element{z-index:100004!important}.driver-position-relative{position:relative!important}.driver-fix-stacking{z-index:auto!important;opacity:1!important;-webkit-transform:none!important;-moz-transform:none!important;-ms-transform:none!important;-o-transform:none!important;transform:none!important;-webkit-filter:none!important;-moz-filter:none!important;-ms-filter:none!important;-o-filter:none!important;filter:none!important;-webkit-perspective:none!important;-moz-perspective:none!important;-ms-perspective:none!important;-o-perspective:none!important;perspective:none!important;-webkit-transform-style:flat!important;-moz-transform-style:flat!important;-ms-transform-style:flat!important;transform-style:flat!important;-webkit-transform-box:border-box!important;-moz-transform-box:border-box!important;-ms-transform-box:border-box!important;-o-transform-box:border-box!important;transform-box:border-box!important;will-change:unset!important}img.emoji{height:1em;width:1em;margin:0 .05em 0 .1em;vertical-align:-.1em}.brand,.brand img{position:relative}.brand img{height:67px;top:10px}.page-wrap{max-width:550px;margin:50px auto;background:#fff;padding:10px 30px;border-radius:5px;color:#1f1f1f}.page-wrap a,.page-wrap a:focus,.page-wrap a:visited{color:#1f1f1f;text-decoration:underline}.page-wrap a.btn__dark{text-decoration:none;color:#fff;background-color:#f44336;padding:0 18px;height:40px;line-height:40px;border-radius:8px;cursor:pointer;transition:background-color .2s,color .2s;font-weight:500;width:195px;font-size:17px;display:inline-block;margin-top:2px}.page-wrap a.btn__run-demo{text-decoration:none;background:#f54336;padding:5px;border-radius:20px;color:#fff;display:block;margin:15px 0 10px;text-align:center}section{margin-bottom:30px}.section__header{margin:10px 0 20px;text-align:center;display:block;padding:10px}.section__header h1{font-size:55px}.section__header h1 .emoji{font-size:45px;top:-4px;margin-right:3px;position:relative}.section__header .tagline{max-width:450px;margin:0 auto 25px;text-align:center}.section__examples .section__example{margin-bottom:20px}.section__examples #creation-input{margin-top:20px}.section__examples input{padding:10px;background-color:#fafbfc;border:3px solid #e1e4e8;border-radius:3px;box-shadow:inset 0 0 10px rgba(27,31,35,.05);margin-bottom:0;margin-top:7px}.position-btns a{text-decoration:none;font-size:13px;padding:10px 15px;background:#f54336;color:#fff!important;border-radius:6px}
\ No newline at end of file

dist/driver.min.css

-div#driver-popover-item{display:none;position:absolute;background:#fff;color:#2d2d2d;margin:0;padding:15px;border-radius:5px;min-width:250px;max-width:300px;box-shadow:0 1px 10px rgba(0,0,0,.4);z-index:1000000000}div#driver-popover-item .driver-popover-tip{border:5px solid #fff;content:"";position:absolute}div#driver-popover-item .driver-popover-tip.bottom{bottom:-10px;border-top-color:#fff;border-right-color:transparent;border-bottom-color:transparent;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.bottom.position-center{left:49%}div#driver-popover-item .driver-popover-tip.bottom.position-right{right:20px}div#driver-popover-item .driver-popover-tip.left{left:-10px;top:10px;border-top-color:transparent;border-right-color:#fff;border-bottom-color:transparent;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.left.position-center{top:46%}div#driver-popover-item .driver-popover-tip.left.position-bottom{top:auto;bottom:20px}div#driver-popover-item .driver-popover-tip.right{right:-10px;top:10px;border-top-color:transparent;border-right-color:transparent;border-bottom-color:transparent;border-left-color:#fff}div#driver-popover-item .driver-popover-tip.right.position-center{top:46%}div#driver-popover-item .driver-popover-tip.right.position-bottom{top:auto;bottom:20px}div#driver-popover-item .driver-popover-tip.top{top:-10px;border-top-color:transparent;border-right-color:transparent;border-bottom-color:#fff;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.top.position-center{left:49%}div#driver-popover-item .driver-popover-tip.top.position-right{right:20px}div#driver-popover-item .driver-popover-footer{display:block;clear:both;margin-top:5px}div#driver-popover-item .driver-popover-footer button{display:inline-block;padding:3px 10px;border:1px solid #d4d4d4;text-decoration:none;text-shadow:1px 1px 0 #fff;color:#2d2d2d;font:11px/normal sans-serif;cursor:pointer;outline:0;background-color:#f1f1f1;border-radius:2px;zoom:1;margin:10px 0 0;line-height:1.3}div#driver-popover-item .driver-popover-footer button.driver-disabled{color:gray;cursor:default;pointer-events:none}div#driver-popover-item .driver-popover-footer .driver-close-btn{float:left}div#driver-popover-item .driver-popover-footer .driver-btn-group{float:right}div#driver-popover-item .driver-popover-title{font:19px/normal sans-serif;margin:0 0 5px;font-weight:700;display:block;position:relative;line-height:1.5;zoom:1}div#driver-popover-item .driver-popover-description{margin-bottom:0;font:14px/normal sans-serif;line-height:1.5;color:#2d2d2d;font-weight:400;zoom:1}.driver-stage-no-animation{-webkit-transition:none!important;-moz-transition:none!important;-ms-transition:none!important;-o-transition:none!important;transition:none!important;background:transparent!important;outline:5000px solid rgba(0,0,0,.75)}div#driver-page-overlay{background:#000;position:fixed;bottom:0;right:0;display:block;width:100%;height:100%;zoom:1;filter:alpha(opacity=75);opacity:.75;z-index:100002!important}div#driver-highlighted-element-stage,div#driver-page-overlay{top:0;left:0;-webkit-transition:all .4s;-moz-transition:all .4s;-ms-transition:all .4s;-o-transition:all .4s;transition:all .4s}div#driver-highlighted-element-stage{position:absolute;height:50px;width:300px;background:#fff;z-index:100003!important;display:none;border-radius:2px}.driver-highlighted-element{z-index:100004!important}.driver-position-relative{position:relative!important}.driver-fix-stacking{z-index:auto!important;opacity:1!important;-webkit-transform:none!important;-moz-transform:none!important;-ms-transform:none!important;-o-transform:none!important;transform:none!important;-webkit-filter:none!important;-moz-filter:none!important;-ms-filter:none!important;-o-filter:none!important;filter:none!important;-webkit-perspective:none!important;-moz-perspective:none!important;-ms-perspective:none!important;-o-perspective:none!important;perspective:none!important;-webkit-transform-style:flat!important;-moz-transform-style:flat!important;-ms-transform-style:flat!important;transform-style:flat!important;-webkit-transform-box:border-box!important;-moz-transform-box:border-box!important;-ms-transform-box:border-box!important;-o-transform-box:border-box!important;transform-box:border-box!important;will-change:unset!important}
-/*# sourceMappingURL=driver.min.css.map*/
\ No newline at end of file
+div#driver-popover-item{display:none;position:absolute;background:#fff;color:#2d2d2d;margin:0;padding:15px;border-radius:5px;min-width:250px;max-width:300px;box-shadow:0 1px 10px rgba(0,0,0,.4);z-index:1000000000}div#driver-popover-item .driver-popover-tip{border:5px solid #fff;content:"";position:absolute}div#driver-popover-item .driver-popover-tip.bottom{bottom:-10px;border-color:#fff transparent transparent}div#driver-popover-item .driver-popover-tip.bottom.position-center{left:49%}div#driver-popover-item .driver-popover-tip.bottom.position-right{right:20px}div#driver-popover-item .driver-popover-tip.left{left:-10px;top:10px;border-color:transparent #fff transparent transparent}div#driver-popover-item .driver-popover-tip.left.position-center{top:46%}div#driver-popover-item .driver-popover-tip.left.position-bottom{top:auto;bottom:20px}div#driver-popover-item .driver-popover-tip.right{right:-10px;top:10px;border-color:transparent transparent transparent #fff}div#driver-popover-item .driver-popover-tip.right.position-center{top:46%}div#driver-popover-item .driver-popover-tip.right.position-bottom{top:auto;bottom:20px}div#driver-popover-item .driver-popover-tip.top{top:-10px;border-color:transparent transparent #fff}div#driver-popover-item .driver-popover-tip.top.position-center{left:49%}div#driver-popover-item .driver-popover-tip.top.position-right{right:20px}div#driver-popover-item .driver-popover-footer{display:block;clear:both;margin-top:5px}div#driver-popover-item .driver-popover-footer button{display:inline-block;padding:3px 10px;border:1px solid #d4d4d4;text-decoration:none;text-shadow:1px 1px 0 #fff;color:#2d2d2d;font:11px/normal sans-serif;cursor:pointer;outline:0;background-color:#f1f1f1;border-radius:2px;zoom:1;margin:10px 0 0;line-height:1.3}div#driver-popover-item .driver-popover-footer button.driver-disabled{color:grey;cursor:default;pointer-events:none}div#driver-popover-item .driver-popover-footer .driver-close-btn{float:left}div#driver-popover-item .driver-popover-footer .driver-btn-group{float:right}div#driver-popover-item .driver-popover-title{font:19px/normal sans-serif;margin:0 0 5px;font-weight:700;display:block;position:relative;line-height:1.5;zoom:1}div#driver-popover-item .driver-popover-description{margin-bottom:0;font:14px/normal sans-serif;line-height:1.5;color:#2d2d2d;font-weight:400;zoom:1}.driver-stage-no-animation{-webkit-transition:none!important;-moz-transition:none!important;-ms-transition:none!important;-o-transition:none!important;transition:none!important;background:transparent!important;outline:5000px solid rgba(0,0,0,.75)}div#driver-page-overlay{background:#000;position:fixed;bottom:0;right:0;display:block;width:100%;height:100%;zoom:1;filter:alpha(opacity=75);opacity:.75;z-index:100002!important}div#driver-highlighted-element-stage,div#driver-page-overlay{top:0;left:0;-webkit-transition:all .4s;-moz-transition:all .4s;-ms-transition:all .4s;-o-transition:all .4s;transition:all .4s}div#driver-highlighted-element-stage{position:absolute;height:50px;width:300px;background:#fff;z-index:100003!important;display:none;border-radius:2px}.driver-highlighted-element{z-index:100004!important}.driver-position-relative{position:relative!important}.driver-fix-stacking{z-index:auto!important;opacity:1!important;-webkit-transform:none!important;-moz-transform:none!important;-ms-transform:none!important;-o-transform:none!important;transform:none!important;-webkit-filter:none!important;-moz-filter:none!important;-ms-filter:none!important;-o-filter:none!important;filter:none!important;-webkit-perspective:none!important;-moz-perspective:none!important;-ms-perspective:none!important;-o-perspective:none!important;perspective:none!important;-webkit-transform-style:flat!important;-moz-transform-style:flat!important;-ms-transform-style:flat!important;transform-style:flat!important;-webkit-transform-box:border-box!important;-moz-transform-box:border-box!important;-ms-transform-box:border-box!important;-o-transform-box:border-box!important;transform-box:border-box!important;will-change:unset!important}
\ No newline at end of file

dist/driver.min.css.map

-{"version":3,"file":"driver.min.css","sources":[],"mappings":"","sourceRoot":""}
\ No newline at end of file
+{"version":3,"file":"driver.min.css","sources":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;","sourceRoot":""}
\ No newline at end of file

package.json

@@ -25,6 +25,7 @@
     "babel-plugin-add-module-exports": "^1.0.0",
     "copy-webpack-plugin": "^4.5.1",
     "css-loader": "^1.0.0",
+    "cssnano": "^4.1.4",
     "eslint": "^5.6.1",
     "eslint-config-airbnb-base": "^13.1.0",
     "eslint-loader": "^2.0.0",
@@ -35,6 +36,7 @@
     "file-loader": "^2.0.0",
     "node-sass": "^4.7.2",
     "opn": "^5.2.0",
+    "optimize-css-assets-webpack-plugin": "^5.0.1",
     "postcss-loader": "^3.0.0",
     "sass-loader": "^7.1.0",
     "style-loader": "^0.23.1",