How to customize HTML & CSS linting rules?

Glitch uses eslint for js files. What does it use for css and html files? Are there sample configs I could customize, or lists of rule names that can be turned on/off?

Question 1. I think it uses eslint too
Question 2. I think yes, check this website

I briefly looked through eslint docs but haven’t found any css rules there. Maybe I looked in a wrong place though.

Just to clarify, I’m not looking for eslint configs in general (I’ve used eslint), but specifically for sections with plugins / etc that Glitch uses for css and html.

Ohhh, only css and html! So I think you can’t

NB: I googled eg. font-family-no-missing-generic-family-keyword and it looks like it’s a stylelint rule — but adding this as .stylelintrc.json on the root level did not help:

{
  "rules": {
    "font-family-no-missing-generic-family-keyword": null
  }
}

So I’m still at a loss.

@keithk I’ll also ping you because you were the one who mentioned eslintrc originally — maybe you have an example for html/css lying around.