Port shadows module to plugin

src/defaultPlugins.js

@@ -1,3 +1,4 @@
+import shadows from './plugins/shadows'
 import svgFill from './plugins/svgFill'
 import svgStroke from './plugins/svgStroke'
 import tableLayout from './plugins/tableLayout'
@@ -14,6 +15,7 @@ import width from './plugins/width'
 import zIndex from './plugins/zIndex'
 
 export default [
+  shadows(),
   svgFill(),
   svgStroke(),
   tableLayout(),

src/generators/shadows.js

@@ -1,10 +0,0 @@
-import _ from 'lodash'
-import defineClass from '../util/defineClass'
-
-export default function({ shadows }) {
-  return _.map(shadows, (shadow, modifier) => {
-    return defineClass(modifier === 'default' ? 'shadow' : `shadow-${modifier}`, {
-      'box-shadow': shadow,
-    })
-  })
-}

src/plugins/shadows.js

@@ -0,0 +1,14 @@
+import _ from 'lodash'
+
+export default function () {
+  return function ({ addUtilities, config, e }) {
+    const utilities = _.fromPairs(_.map(config('shadows'), (value, modifier) => {
+      const className = modifier === 'default' ? 'shadow' : `shadow-${modifier}`
+      return [`.${className}`, {
+        'box-shadow': value,
+      }]
+    }))
+
+    addUtilities(utilities, config('modules.shadows'))
+  }
+}

src/utilityModules.js

@@ -33,7 +33,6 @@ import padding from './generators/padding'
 import pointerEvents from './generators/pointerEvents'
 import position from './generators/position'
 import resize from './generators/resize'
-import shadows from './generators/shadows'
 
 export default [
   { name: 'lists', generator: lists },
@@ -71,5 +70,4 @@ export default [
   { name: 'pointerEvents', generator: pointerEvents },
   { name: 'position', generator: position },
   { name: 'resize', generator: resize },
-  { name: 'shadows', generator: shadows },
 ]