css-conditional-4.json

{
  "spec": {
    "title": "CSS Conditional Rules Module Level 4",
    "url": "https://www.w3.org/TR/css-conditional-4/"
  },
  "properties": {},
  "descriptors": {},
  "valuespaces": {
    "<supports-feature>": {
      "value": "<supports-selector-fn> | <supports-decl>"
    },
    "<supports-selector-fn>": {
      "value": "selector( <complex-selector> )"
    }
  }
}