I have already an existing wordpress website, with a backend written in php, login functionality, a comment sections and so on.
I have also a chart section currently implement with google charts.
Due to privacy issue, I have now switch all the charts from google charts to chart.js.
Your current task would be to change the google charts to the [login to view URL] charts.
We have already the functionality, with which you can populate the charts with data (the backend is already working and stable).
Please only contact me, if you are a freelance and not agency.