GridLines

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

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