html - area chart fill-opacity issue in c3js and angular 2

Question

I have created a line chart using c3.js and angular 2.But i am getting a unwanted black area in line chart.It's working more likely chart with filled area.I am trying to override it's css property..."fill-opacity". but it's not working.Give me a solution.enter image description here

Answer 1

Due to c3 lib CSS is missing. CSS file for C3 chart .

https://rawgit.com/masayuki0812/c3/master/c3.css.