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+# postcss-pseudoelements
+
+postcss helper for pseudo element colons, it handles double -> single and single -> double.
+
+## Usage
+
+### Double to Single (default)
+```javascript
+var pe = require('postcss-pseudoelements');
+var postcss = require('postcss');
+var options = {
+	single: true, // default
+	selectors: ['before','after','first-letter','first-line'], // default
+};
+
+var processor = postcss(pe(options));
+
+console.log(processor.process('a:before {}').css) // outputs: a:before {}
+console.log(processor.process('a::before {}').css) // outputs: a:before {}
+```
+
+### Single to Double
+
+```javascript
+var pe = require('postcss-pseudoelements');
+var postcss = require('postcss');
+var options = {
+	single: false,
+	selectors: ['before','after','first-letter','first-line'], // default
+};
+
+var processor = postcss(pe(options));
+
+console.log(processor.process('a:before {}').css) // outputs: a::before {}
+console.log(processor.process('a::before {}').css) // outputs: a::before {}
+```
+
+## Options
+
+`single`: Boolean
+* `true` (default) if you want to move from double colon to colon for backwards compatibility
+* `false` if you need double colons
+
+`selectors`: `Array` of pseudo-element selectors to rewrite with single and double colons. Note that these values will be used in a regexp without escaping. Defaults to `['before','after','first-letter','first-line']`
+
+example selectors:
+```
+var options = {
+  selectors: [
+    'hover',
+    'focus',
+    'active',
+    'after',
+    'ms-expand',
+    'not',
+    'first-child',
+    'last-child'
+  ],
+};
+```
+
+### Defaults
+```javascript
+var options = {
+  single: true,
+  [
+    'before',
+    'after',
+    'first-letter',
+    'first-line'
+  ]
+};
+```