WebDropDown™ supports keyboard navigation.
TAB - Sets focus on the drop-down.
ALT + AccessKey (ALT + SHIFT + AccessKey) - Places focus on the drop-down.
ESC - Automatically closes the drop-down and cancels any animations that are currently executing when the drop-down container is opened or while it is opening.
ALT+DOWN ARROW - Shows the drop-down container once the focus is on the drop-down.
ALT+ UP ARROW - Hides the drop-down container once the focus is on the drop-down.
DOWN ARROW & UP ARROW - Navigates through the items and the current item is automatically activated and selected when the drop-down container is shown; the drop-down container should only be closed when the end-user presses ESC or ENTER .
ENTER - Invokes NavigateUrl.
SPACE +CTRL - Selects or deselects an item when multiple selection is enabled.
CTRL + UP/DOWN - Changes the current active item but doesn’t modify selection when multiple selection is enabled (exactly as it is in Windows Explorer).
HOME - Scrolls to the first drop-down item, selects and activates it.
END - Scrolls to the last drop-down item, selects and activates it.