The public API is terribly simple. It's just one function: Morris.Line (options), where options is an object containing some of the configuration options.
Create bar charts using Morris.Bar(options), where options is an object containing the configuration options.
Create stacked bar charts using Morris.Bar(options), where options is an object containing the configuration options.
Create an area chart using Morris.Area(options). Area charts take all the same options as line charts.
Create an area chart using Morris.Area(options). Area charts take all the same options as line charts.
This really couldn't be easier. Create a Donut chart using Morris.Donut(options).