Add ability to remove elements by className

plugins/removeElementsByAttr.js

@@ -4,7 +4,7 @@ exports.type = 'perItem';
 
 exports.active = false;
 
-exports.description = 'removes arbitrary elements by ID (disabled by default)';
+exports.description = 'removes arbitrary elements by ID or className (disabled by default)';
 
 exports.params = {
     id: [],
@@ -12,7 +12,7 @@ exports.params = {
 };
 
 /**
- * Remove SVG elements by ID.
+ * Remove arbitrary SVG elements by ID or className.
  *
  * @param id
  *   examples:
@@ -29,26 +29,52 @@ exports.params = {
  *         - 'elementID'
  *         - 'anotherID'
  *
+ * @param class
+ *   examples:
+ *
+ *     > single: remove all elements with class of `elementClass`
+ *     ---
+ *     removeElementsByAttr:
+ *       class: 'elementClass'
+ *
+ *     > list: remove all elements with class of `elementClass` or `anotherClass`
+ *     ---
+ *     removeElementsByAttr:
+ *       class:
+ *         - 'elementClass'
+ *         - 'anotherClass'
+ *
  * @param {Object} item current iteration item
  * @param {Object} params plugin params
  * @return {Boolean} if false, item will be filtered out
  *
- * @author Eli Dupuis
+ * @author Eli Dupuis (@elidupuis)
  */
 exports.fn = function(item, params) {
-    var elemId;
+    var elemId, elemClass;
 
-    // wrap into an array if params is not
-    if (!Array.isArray(params.id)) {
-        params.id = [params.id];
-    }
+    // wrap params in an array if not already
+    ['id', 'class'].forEach(function(key) {
+        if (!Array.isArray(params[key])) {
+            params[key] = [ params[key] ];
+        }
+    });
 
+    // abort if current item is no an element
     if (!item.isElem()) {
         return;
     }
 
+    // remove element if it's `id` matches configured `id` params
     elemId = item.attr('id');
     if (elemId) {
         return params.id.indexOf(elemId.value) === -1;
     }
+
+    // remove element if it's `class` contains any of the configured `class` params
+    elemClass = item.attr('class');
+    if (elemClass) {
+        var hasClassRegex = new RegExp(params.class.join('|'));
+        return !hasClassRegex.test(elemClass.value);
+    }
 };