diff --git a/PickerMenu.js b/PickerMenu.js
index 5ed4bf0..07cf6c6 100644
--- a/PickerMenu.js
+++ b/PickerMenu.js
@@ -1,5 +1,5 @@
 // Menu-like Picker variant with keyboard control
-// Version 2021-08-30
+// Version 2021-09-13
 // License: LGPLv3.0+
 // (c) Vitaliy Filippov 2020+
 
@@ -25,6 +25,8 @@ export default class PickerMenu extends Picker
         keepOnClick: PropTypes.bool,
         // menuitem name key - default empty (render the item itself)
         labelKey: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
+        // menuitem CSS class key - default none
+        classKey: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
         // menuitem "disabled" key - default none
         disabledKey: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
         // change theme (CSS module) for this input
@@ -42,7 +44,7 @@ export default class PickerMenu extends Picker
                 active = dir == 1 ? 0 : this.props.items.length-1;
             else
                 active = (prev + this.props.items.length - dir) % this.props.items.length;
-            if (this.props.disabledKey)
+            if (this.props.disabledKey != null)
             {
                 while (this.props.items[active][this.props.disabledKey] && active != prev)
                 {
@@ -58,6 +60,7 @@ export default class PickerMenu extends Picker
             {
                 this.focus();
             }
+            ev.preventDefault();
         }
         else if (ev.which == 10 || ev.which == 13)
         {
@@ -70,6 +73,7 @@ export default class PickerMenu extends Picker
             {
                 this.onMouseDown();
             }
+            ev.preventDefault();
         }
     }
 
@@ -107,7 +111,7 @@ export default class PickerMenu extends Picker
             e = e.parentNode;
         }
         if (e && e.getAttribute('data-idx') &&
-            (!this.props.disabledKey || !this.props.items[e.getAttribute('data-idx')][this.props.disabledKey]))
+            (this.props.disabledKey == null || !this.props.items[e.getAttribute('data-idx')][this.props.disabledKey]))
         {
             this.setState({ active: e.getAttribute('data-idx') });
         }
@@ -158,7 +162,8 @@ export default class PickerMenu extends Picker
             {this.props.beforeItems}
             {this.props.items.map((e, i) => (<div key={i} data-idx={i} onMouseDown={this.onMouseDown}
                 className={theme.suggestion+
-                    (this.props.disabledKey && e[this.props.disabledKey] ? ' '+theme.disabled : '')+
+                    (this.props.disabledKey != null && e[this.props.disabledKey] ? ' '+theme.disabled : '')+
+                    (this.props.classKey != null && e[this.props.classKey] ? ' '+e[this.props.classKey] : '')+
                     (this.state.active == i ? ' '+theme.active : '')}>
                 {!this.props.labelKey ? e : e[this.props.labelKey]}
             </div>))}