All charts on the RGraph website have been switched to canvas-based text
Written by Richard Heyes, RGraph author, on 5th June 2022
Perhaps you're aware of the RGraph websites' utterly dire
performance on Google. Just google javascript charts
and you will see. If you're in the UK the
site may be on page 3 or 4 and if you're elsewhere in
the world then you'll probably see it even lower.
This has been a constant cause of pain for me over the past ten (!) years. I'm frequently doing various things to try and increase the ranking - nothing ever works.
My latest attempt has been to switch all of the charts
on the website from using accessible text to using
canvas text. The default hasn't changed, however,
so if you
use RGraph your charts will be unaffected and your site
is also unlikely to be affected this. This website
however has many, many pages which show charts(100-200)
so the setting might well be having an effect.
It will take time for everything to be re-indexed and maybe even more time for the relevant Google algorithm to run and reassess the website so this change will take time to have an effect - if it has one at all!