diff --git a/README.md b/README.md
index bc9713e..15bc5fe 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,45 @@ rollup({
 });
 ```
 
+Below is how you can use it from the command line with Bublé.
+Run `rollup -c` and it will find the config.
+
+```js
+// rollup.config.js
+import vue from 'rollup-plugin-vue'
+import buble from 'rollup-plugin-buble' // rollup-plugin-babel also works
+
+export default {
+  entry: 'index.js',
+  plugins: [
+    vue(),
+    buble()
+  ]
+}
+```
+
+### Options
+
+```js
+vue({
+  // Filename to write all styles to
+  css: 'bundle.scss',
+
+  // Callback that will be called ongenerate with two arguments:
+  // - styles: the contents of all style tags combined
+  // - styleNodes: an array of style objects: [{lang: 'css', content: 'body { color: green }'}]
+  css: function (styles, styleNodes) {
+    writeFileSync(cssPath, styles)
+  }
+
+  // Disable any style output or callbacks
+  css: false,
+
+  // Default behaviour is to write all styles to the bundle destination where .js is replaced by .css
+  css: null
+})
+```
+
 ## Change log
 
 Please see [CHANGELOG](CHANGELOG.md) for more information what has changed recently.
@@ -77,7 +116,7 @@ If you discover any security related issues, please email hi@znck.me instead of
 ## Credits
 
 - [Rahul Kadyan][link-author]
-- [Thomas Ghysels](https://github/thgh)
+- [Thomas Ghysels](https://github.com/thgh)
 - [All Contributors][link-contributors]
 
 ## License
diff --git a/dist/rollup-plugin-vue.common.js b/dist/rollup-plugin-vue.common.js
index 1eff511..d335816 100644
--- a/dist/rollup-plugin-vue.common.js
+++ b/dist/rollup-plugin-vue.common.js
@@ -129,45 +129,43 @@ function vueTransform(code, filePath) {
     // 4. Process template
     var template = processTemplate(nodes.template, filePath, code);
 
-    // 5. Process script
-    var output = {
+    // 5. Process script & style
+    return {
         js: processScript(nodes.script, filePath, code, template),
+        css: nodes.style && {
+            content: parse5.serialize(nodes.style),
+            lang: checkLang(nodes.style),
+        },
     };
-
-    // 6. Process style
-    if (nodes.style) {
-        output.css = parse5.serialize(nodes.style);
-        output.cssLang = checkLang(nodes.style);
-    }
-
-    return output;
 }
 
 function vue(options) {
     if ( options === void 0 ) options = {};
 
     var filter = rollupPluginutils.createFilter(options.include, options.exclude);
-    var cssContent = {};
-    var cssLang = {};
-    var dest = 'bundle.js';
+    var styles = {};
+    var dest = options.css;
 
     return {
         name: 'vue',
         transform: function transform(source, id) {
             if (!filter(id) || !id.endsWith('.vue')) {
+                if (id.endsWith('vue.common.js')) {
+                    return source.replace(/process\.env\.NODE_ENV/g,
+                        process.env.NODE_ENV || 'window.NODE_ENV');
+                }
                 return null;
             }
 
             var ref = vueTransform(source, id);
+            var js = ref.js;
+            var css = ref.css;
 
-            // Map of every stylesheet content
-            cssContent[id] = ref.css || '';
-
-            // Map of every stylesheet lang
-            cssLang[id] = ref.cssLang || 'css';
+            // Map of every stylesheet
+            styles[id] = css || {};
 
             // Component javascript with inlined html template
-            return ref.js;
+            return js;
         },
         ongenerate: function ongenerate(opts) {
             if (options.css === false) {
@@ -176,33 +174,36 @@ function vue(options) {
 
             // Combine all stylesheets
             var css = '';
-            Object.keys(cssContent).forEach(function (key) {
-                css += cssContent[key];
+            Object.keys(styles).forEach(function (key) {
+                css += styles[key].content || '';
             });
 
-            // Emit styles through callback or file
+            // Emit styles through callback
             if (typeof options.css === 'function') {
-                options.css(css);
-
+                options.css(css, styles);
                 return;
             }
 
-            // Guess destination filename
-            if (typeof options.css !== 'string') {
+            if (typeof dest !== 'string') {
+                // Don't create unwanted empty stylesheets
+                if (!css.length) {
+                    return;
+                }
+
+                // Guess destination filename
                 dest = opts.dest || 'bundle.js';
                 if (dest.endsWith('.js')) {
                     dest = dest.slice(0, -3);
                 }
-                /* eslint-disable */
-                options.css = dest + ".css";
-                /* eslint-enable */
+                dest = dest + ".css";
             }
 
-            fs.writeFile(options.css, css, function (err) {
+            // Emit styles to file
+            fs.writeFile(dest, css, function (err) {
                 if (err) {
                     throw err;
                 }
-                emitted(options.css, css.length);
+                emitted(dest, css.length);
             });
         },
     };
@@ -216,9 +217,13 @@ function green(text) {
     return ("\u001b[1m\u001b[32m" + text + "\u001b[39m\u001b[22m");
 }
 
-function getSize(size) {
-    var bytes = size / 1024;
-    return bytes < 1000 ? ((bytes.toPrecision(3)) + " kB") : (((bytes / 1024).toPrecision(3)) + " MB");
+function getSize(bytes) {
+    if (bytes < 10000) {
+        return ((bytes.toFixed(0)) + " B");
+    }
+    return bytes < 1024000
+        ? (((bytes / 1024).toPrecision(3)) + " kB'")
+        : (((bytes / 1024 / 1024).toPrecision(4)) + " MB");
 }
 
 module.exports = vue;
\ No newline at end of file
diff --git a/dist/rollup-plugin-vue.js b/dist/rollup-plugin-vue.js
index aed65dd..4043e20 100644
--- a/dist/rollup-plugin-vue.js
+++ b/dist/rollup-plugin-vue.js
@@ -125,45 +125,43 @@ function vueTransform(code, filePath) {
     // 4. Process template
     var template = processTemplate(nodes.template, filePath, code);
 
-    // 5. Process script
-    var output = {
+    // 5. Process script & style
+    return {
         js: processScript(nodes.script, filePath, code, template),
+        css: nodes.style && {
+            content: parse5.serialize(nodes.style),
+            lang: checkLang(nodes.style),
+        },
     };
-
-    // 6. Process style
-    if (nodes.style) {
-        output.css = parse5.serialize(nodes.style);
-        output.cssLang = checkLang(nodes.style);
-    }
-
-    return output;
 }
 
 function vue(options) {
     if ( options === void 0 ) options = {};
 
     var filter = rollupPluginutils.createFilter(options.include, options.exclude);
-    var cssContent = {};
-    var cssLang = {};
-    var dest = 'bundle.js';
+    var styles = {};
+    var dest = options.css;
 
     return {
         name: 'vue',
         transform: function transform(source, id) {
             if (!filter(id) || !id.endsWith('.vue')) {
+                if (id.endsWith('vue.common.js')) {
+                    return source.replace(/process\.env\.NODE_ENV/g,
+                        process.env.NODE_ENV || 'window.NODE_ENV');
+                }
                 return null;
             }
 
             var ref = vueTransform(source, id);
+            var js = ref.js;
+            var css = ref.css;
 
-            // Map of every stylesheet content
-            cssContent[id] = ref.css || '';
-
-            // Map of every stylesheet lang
-            cssLang[id] = ref.cssLang || 'css';
+            // Map of every stylesheet
+            styles[id] = css || {};
 
             // Component javascript with inlined html template
-            return ref.js;
+            return js;
         },
         ongenerate: function ongenerate(opts) {
             if (options.css === false) {
@@ -172,33 +170,36 @@ function vue(options) {
 
             // Combine all stylesheets
             var css = '';
-            Object.keys(cssContent).forEach(function (key) {
-                css += cssContent[key];
+            Object.keys(styles).forEach(function (key) {
+                css += styles[key].content || '';
             });
 
-            // Emit styles through callback or file
+            // Emit styles through callback
             if (typeof options.css === 'function') {
-                options.css(css);
-
+                options.css(css, styles);
                 return;
             }
 
-            // Guess destination filename
-            if (typeof options.css !== 'string') {
+            if (typeof dest !== 'string') {
+                // Don't create unwanted empty stylesheets
+                if (!css.length) {
+                    return;
+                }
+
+                // Guess destination filename
                 dest = opts.dest || 'bundle.js';
                 if (dest.endsWith('.js')) {
                     dest = dest.slice(0, -3);
                 }
-                /* eslint-disable */
-                options.css = dest + ".css";
-                /* eslint-enable */
+                dest = dest + ".css";
             }
 
-            fs.writeFile(options.css, css, function (err) {
+            // Emit styles to file
+            fs.writeFile(dest, css, function (err) {
                 if (err) {
                     throw err;
                 }
-                emitted(options.css, css.length);
+                emitted(dest, css.length);
             });
         },
     };
@@ -212,9 +213,13 @@ function green(text) {
     return ("\u001b[1m\u001b[32m" + text + "\u001b[39m\u001b[22m");
 }
 
-function getSize(size) {
-    var bytes = size / 1024;
-    return bytes < 1000 ? ((bytes.toPrecision(3)) + " kB") : (((bytes / 1024).toPrecision(3)) + " MB");
+function getSize(bytes) {
+    if (bytes < 10000) {
+        return ((bytes.toFixed(0)) + " B");
+    }
+    return bytes < 1024000
+        ? (((bytes / 1024).toPrecision(3)) + " kB'")
+        : (((bytes / 1024 / 1024).toPrecision(4)) + " MB");
 }
 
 export default vue;
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
index 3c8bbc0..b4d9502 100644
--- a/src/index.js
+++ b/src/index.js
@@ -5,27 +5,27 @@ import vueTransform from './vueTransform';
 
 export default function vue(options = {}) {
     const filter = createFilter(options.include, options.exclude);
-    const cssContent = {};
-    const cssLang = {};
-    let dest = 'bundle.js';
+    const styles = {};
+    let dest = options.css;
 
     return {
         name: 'vue',
         transform(source, id) {
             if (!filter(id) || !id.endsWith('.vue')) {
+                if (id.endsWith('vue.common.js')) {
+                    return source.replace(/process\.env\.NODE_ENV/g,
+                        process.env.NODE_ENV || 'window.NODE_ENV');
+                }
                 return null;
             }
 
-            const ref = vueTransform(source, id);
-
-            // Map of every stylesheet content
-            cssContent[id] = ref.css || '';
+            const { js, css } = vueTransform(source, id);
 
-            // Map of every stylesheet lang
-            cssLang[id] = ref.cssLang || 'css';
+            // Map of every stylesheet
+            styles[id] = css || {};
 
             // Component javascript with inlined html template
-            return ref.js;
+            return js;
         },
         ongenerate(opts) {
             if (options.css === false) {
@@ -34,33 +34,36 @@ export default function vue(options = {}) {
 
             // Combine all stylesheets
             let css = '';
-            Object.keys(cssContent).forEach((key) => {
-                css += cssContent[key];
+            Object.keys(styles).forEach((key) => {
+                css += styles[key].content || '';
             });
 
-            // Emit styles through callback or file
+            // Emit styles through callback
             if (typeof options.css === 'function') {
-                options.css(css);
-
+                options.css(css, styles);
                 return;
             }
 
-            // Guess destination filename
-            if (typeof options.css !== 'string') {
+            if (typeof dest !== 'string') {
+                // Don't create unwanted empty stylesheets
+                if (!css.length) {
+                    return;
+                }
+
+                // Guess destination filename
                 dest = opts.dest || 'bundle.js';
                 if (dest.endsWith('.js')) {
                     dest = dest.slice(0, -3);
                 }
-                /* eslint-disable */
-                options.css = `${dest}.css`;
-                /* eslint-enable */
+                dest = `${dest}.css`;
             }
 
-            writeFile(options.css, css, (err) => {
+            // Emit styles to file
+            writeFile(dest, css, (err) => {
                 if (err) {
                     throw err;
                 }
-                emitted(options.css, css.length);
+                emitted(dest, css.length);
             });
         },
     };
@@ -74,7 +77,11 @@ function green(text) {
     return `\u001b[1m\u001b[32m${text}\u001b[39m\u001b[22m`;
 }
 
-function getSize(size) {
-    const bytes = size / 1024;
-    return bytes < 1000 ? `${bytes.toPrecision(3)} kB` : `${(bytes / 1024).toPrecision(3)} MB`;
+function getSize(bytes) {
+    if (bytes < 10000) {
+        return `${bytes.toFixed(0)} B`;
+    }
+    return bytes < 1024000
+        ? `${(bytes / 1024).toPrecision(3)} kB'`
+        : `${(bytes / 1024 / 1024).toPrecision(4)} MB`;
 }
diff --git a/src/vueTransform.js b/src/vueTransform.js
index 8dee309..4d20df2 100644
--- a/src/vueTransform.js
+++ b/src/vueTransform.js
@@ -109,16 +109,12 @@ export default function vueTransform(code, filePath) {
     // 4. Process template
     const template = processTemplate(nodes.template, filePath, code);
 
-    // 5. Process script
-    const output = {
+    // 5. Process script & style
+    return {
         js: processScript(nodes.script, filePath, code, template),
+        css: nodes.style && {
+            content: parse5.serialize(nodes.style),
+            lang: checkLang(nodes.style),
+        },
     };
-
-    // 6. Process style
-    if (nodes.style) {
-        output.css = parse5.serialize(nodes.style);
-        output.cssLang = checkLang(nodes.style);
-    }
-
-    return output;
 }