Optional fillCSS color used with context fill command.
Examples: 'red', '#ff0000', '#ff000010', 'rgb(255,0,0)'
Optional lineLine width, 1.0 by default.
Optional shadowLevel of blur applied to shadows.
Values that are not finite numbers greater than or equal to zero are ignored.
Optional shadowCSS color used for the shadow.
Examples: 'red', '#ff0000', '#ff000010', 'rgb(255,0,0)'
Optional strokeCSS color used with context stroke command.
Examples: 'red', '#ff0000', '#ff000010', 'rgb(255,0,0)'
Element style