Assorted features

This is an assortment of feature-demonstrations.

Features:

• The star uses a data-maphilight attribute to adjust how it looks
• The right-hand square uses a data-maphilight attribute to always be visible, to have no border, and to have a greenish fill; its stroke-color is overridden because it's always on
• The lower-left square is linked to the star using groupBy. When you mouse over it the star will hilight as well.
• The lower-right square has a shadow.
• The circle at the top-right is always visible, and has a custom line stroke so it's dashed
• Mouse over this to trigger a hilight from an external element!
• Click this to toggle whether or not the star will hilight
• Click this to toggle whether or not the star is always hilighted; or click the star itself