fix: Check for bindings existence when off method is called with no args

close #40

Author: finom

Diff for: src/off/index.js

@@ -36,10 +36,12 @@ export default function off(object, givenNames, callback, context) {
         def.events = {};
 
         nofn.forOwn(def.props, ({ bindings }, propName) => {
-            nofn.forEach(bindings, ({ node }) => {
-                const eventNamespace = def.id + propName;
-                dom.$(node).off(`.${eventNamespace}`);
-            });
+            if(bindings) {
+                nofn.forEach(bindings, ({ node }) => {
+                    const eventNamespace = def.id + propName;
+                    dom.$(node).off(`.${eventNamespace}`);
+                });
+            }
         });
 
         return object;