diff --git a/B.js b/B.js
index e0d8c71..d9245f2 100644
--- a/B.js
+++ b/B.js
@@ -29,7 +29,7 @@ function B(els, attrs) {
   // Map a function to the first element in 'this'
   B.prototype.mapOne = function(callback) {
     var m = this.map(callback);
-    return m.length > 1 ? m : m[0];
+    return m.length > 1 ? m[0] : m;
   };
 
   // Update css for each element in 'this'
@@ -57,6 +57,13 @@ function B(els, attrs) {
     }
   };
 
+  // Check if the first element has the requested class
+  B.prototype.hasClass = function(cls) {
+    return this.mapOne(function(el){
+      return (' ' + el.className + ' ').indexOf(' ' + cls + ' ') > -1;
+    });
+  }
+
   // Add a class to each element in 'this'
   B.prototype.addClass = function(classes) {
     var className = "";