There's also only very rudimentary support for page headers and footers.
wkhtmktopdf is probably ok if you just need a quick single page invoice printout, but the moment you need more (in our case, we definitely do), I can highly recommend paying for https://www.princexml.com/ which has support for a lot of printing specific features.
We wanted the same view to be passed into wkhtmltopdf to download it as PDF (with a couple of things omitted).
Unfortunately, the JS didn't execute properly, so you get a borked output.
End result was we render it, capture the HTML after render, and pipe that through to wkhtmltopdf.
Using chrome _should_ resolve that issue and let us just pass the page through.
Here's an example fully rendered in React:
And one with svg charts:
With -webkit- prefixes you can use even flexbox, and and with js polyfills you'll have all you need.
Of course if I would start a project now, I would use chrome headless, but I don't feel wkhtmltopdf is that bad.