I'm building a combine chart and I need to fix the background color of chart.
I'm new in oJet and javascript. In ojChart documentation I've seen that I can use plotArea.backgroundColor option for achiving this, but, I don't know put the correct code in my callback function chart. Can somebody help me and show me a example code in a example callback function?
function( options ) {
........
return options;
}
A lot of thanks