The appearance configuration for the major and minor axis grid lines (see example).
The color of the grid lines. Accepts a valid CSS color string, including hex and rgb.
The dash type of the grid lines.
The number of lines to skip at the beginning.
The tick-rendering step. Renders every nth line, where
n is the step.
If set to
true, the Chart displays the lines.
By default, only the major axis grid lines are visible.
The width of the lines in pixels.