.stylelintrc.json

{
  "extends": "stylelint-config-standard",
  "rules": {
    "alpha-value-notation": "percentage",
    "color-function-notation": "modern",
    "hue-degree-notation": "angle",
    "property-no-vendor-prefix": [
      true,
      {
        "ignoreProperties": [
          "border-image",
          "/^mask-/"
        ]
      }
    ],
    "selector-type-no-unknown": [
      true,
      {
        "ignoreTypes": [
          "/^devtools-/"
        ]
      }
    ]
  }
}