SmartMenus Keyboard Addon
This is a demo of the SmartMenus jQuery Keyboard Addon which you can optionally include on your pages in addition to the SmartMenus jQuery plugin. It brings advanced keyboard navigation for all menu trees you may have on your pages.
By default without this addon the SmartMenus plugin includes basic keyboard navigation support - a user can use the Tab key to cycle through all main menu links, the Enter or Space key to activate the sub menus and also include their links in the tab order and the Esc key to deactivate the sub menus.
This addon takes keyboard navigation to a more advanced level by allowing the use of the keyboard ← → ↑ ↓ arrow keys to browse the menu tree conveniently. Additionally a hotkey can be set too if needed - i.e. a keyboard shortcut that will send focus to any menu tree.
Improving further accessibility
You can consider improving even further accessibility for users of screen readers or text mode browsers by wrapping the main menu item links in headings - e.g. on this demo page
<h2> tags are used. This would allow such users to skip from branch to branch more easily in certain scenarios.
Press Shift + F12 to send focus to the first link in the main menu above (or press Tab as many times as need to focus some of the menu items). Then press Enter, Space or ↓ to activate some sub menu and then you can use the ← → ↑ ↓ arrow keys to move the focus to other menu items. The script will automatically show/hide the sub menus as needed. You can press Esc at any time to deactivate the sub menus.
This addon introduces the following API method:
Sets a hotkey combination that will send focus to the menu tree.Arguments:
- Type: Integer
The key code for the hotkey (a good char code reference).
- Type: String, Array
The hotkey modifier key. None, one or multiple of
// set Shift + F12 hotkey $('#main-menu').smartmenus('keyboardSetHotkey', 123, 'shiftKey'); // set Ctrl + Alt + Shift + F12 hotkey $('#main-menu').smartmenus('keyboardSetHotkey', 123, ['ctrlKey', 'altKey', 'shiftKey']);Note: It is recommended to always use a combination (i.e. modifier + key) rather than use just a single key to avoid preventing important default browser features from working.
'shiftKey'is best supported and probably the safest modifier you could use.
'altKey'generally work well too, there were just some issues with older Opera versions.
'metaKey'is the Mac ⌘ key and it only works on Macs so, unless you know what you are doing, you probably shouldn't use it.