GridLines

Specifies the appearance configuration for the major and minor axis grid lines (see example).

Name	Type	Default	Description
color?	string		Specifies the color of the grid lines. Accepts a valid CSS color string, including hex and rgb.
dashType?	DashType		Specifies the dash type of the grid lines.
skip?	number		Specifies the number of lines to skip at the beginning.
step?	number		Specifies the tick-rendering step. Renders every nth line, where n is the step.
visible?	boolean		Determines whether to display the lines. By default, only the major axis grid lines are visible.
width?	number		Specifies the width of the lines in pixels.