add .remove(regexp) support

Readme.md

@@ -13,7 +13,10 @@ $ component install component/classes
 
 ```js
 var classes = require('classes');
-classes(el).add('foo').toggle('bar');
+classes(el)
+  .add('foo')
+  .toggle('bar')
+  .remove(/^item-\d+/);
 ```
 
 ## API
@@ -24,7 +27,7 @@ classes(el).add('foo').toggle('bar');
 
 ### .remove(class)
 
-  Remove `class`.
+  Remove `class` name or all classes matching the given regular expression.
 
 ### .toggle(class)
 
@@ -38,6 +41,6 @@ classes(el).add('foo').toggle('bar');
 
   Return an array of classes.
 
-## License 
+## License
 
-  MIT
+  MIT

index.js

@@ -11,6 +11,12 @@ var index = require('indexof');
 
 var re = /\s+/;
 
+/**
+ * toString reference.
+ */
+
+var toString = Object.prototype.toString;
+
 /**
  * Wrap `el` in a `ClassList`.
  *
@@ -59,14 +65,20 @@ ClassList.prototype.add = function(name){
 };
 
 /**
- * Remove class `name` when present.
+ * Remove class `name` when present, or
+ * pass a regular expression to remove
+ * any which match.
  *
- * @param {String} name
+ * @param {String|RegExp} name
  * @return {ClassList}
  * @api public
  */
 
 ClassList.prototype.remove = function(name){
+  if ('[object RegExp]' == toString.call(name)) {
+    return this.removeMatching(name);
+  }
+
   // classList
   if (this.list) {
     this.list.remove(name);
@@ -81,6 +93,24 @@ ClassList.prototype.remove = function(name){
   return this;
 };
 
+/**
+ * Remove all classes matching `re`.
+ *
+ * @param {RegExp} re
+ * @return {ClassList}
+ * @api private
+ */
+
+ClassList.prototype.removeMatching = function(re){
+  var arr = this.array();
+  for (var i = 0; i < arr.length; i++) {
+    if (re.test(arr[i])) {
+      this.remove(arr[i]);
+    }
+  }
+  return this;
+};
+
 /**
  * Toggle class `name`.
  *

test/classes.js

@@ -43,6 +43,14 @@ describe('classes(el)', function(){
     })
   })
 
+  describe('.remove(regexp)', function(){
+    it('should remove matching classes', function(){
+      el.className = 'foo item-1 item-2 bar';
+      classes(el).remove(/^item-/);
+      assert('foo bar' == el.className);
+    })
+  })
+
   describe('.toggle(class)', function(){
     describe('when present', function(){
       it('should remove the class', function(){
@@ -84,4 +92,4 @@ describe('classes(el)', function(){
       assert(true === classes(el).has('there'));
     })
   })
-})
+})