What is the best way to create offline html reports with graphs?

Question

HTML

It is required to create an html report with graphs (mostly bar graphs, nothing unusual). At the moment, there is a self-written bicycle in Java that can create html reports with tables and some other features. As an option, I can generate a picture with a graph and embed it in the document, but then it may turn out to be too weighty, since a lot of graphs are expected.
What is the best charting library to use? One of the requirements is to pack each report into one file.

Answer 1

you need to look towards svg-graphics (or canvas). this is a vector graphics that is embedded directly in the html code or in a separate file that is included in the html and displayed directly in the body of the html page.
svg is easy to program (according to point coordinates), you can create very interesting and complex infographic things. And all this with minimal (because vector) file sizes.
there are even libraries that have an API specifically for plotting and charting. Unfortunately, I can not remember the links and names, Google to help.

Answer 2

you can do it online based on this systemo.biz/kpi-wordpress
and then attach the ability to save to it