This version uses SheetJS js-xlsx and
D3 to read the data and to plot the growth in cases and
deaths due to COVID-19. The required software is loaded from
Cloudflare. The ECDC COVID-19
data
first has to be copied to the web server because Cross-origin resource
sharing prevents
the file from being loaded directly with an XMLHttpRequest.
If this directory is installed in the directory covid-19 of the server
example.com, the chart of deaths is requested with this URL:
https://example.com/covid-19/?key=deaths
