.stylelintrc

{
  "extends": ["stylelint-config-standard", "stylelint-config-standard-scss"],
  "plugins": [
    "@double-great/stylelint-a11y",
    "stylelint-declaration-block-no-ignored-properties",
    "stylelint-no-unsupported-browser-features",
    "stylelint-scss"
  ],
  "rules": {
    "alpha-value-notation": null,
    "at-rule-empty-line-before": [
      "always",
      {
        "except": [
          "blockless-after-same-name-blockless",
          "blockless-after-blockless",
          "first-nested"
        ]
      }
    ],
    "at-rule-no-unknown": [
      true,
      { "ignoreAtRules": ["extend", "include", "mixin", "content"] }
    ],
    "at-rule-no-vendor-prefix": true,
    "block-no-empty": true,
    "color-function-notation": null,
    "color-named": "never",
    "color-no-invalid-hex": true,
    "comment-empty-line-before": "always",
    "comment-no-empty": true,
    "comment-whitespace-inside": "always",
    "declaration-block-no-duplicate-properties": true,
    "declaration-block-no-redundant-longhand-properties": true,
    "declaration-block-no-shorthand-property-overrides": true,
    "declaration-no-important": true,
    "font-family-name-quotes": "always-unless-keyword",
    "font-family-no-duplicate-names": true,
    "font-family-no-missing-generic-family-keyword": true,
    "font-weight-notation": "numeric",
    "function-calc-no-unspaced-operator": true,
    "function-linear-gradient-no-nonstandard-direction": true,
    "function-name-case": "lower",
    "function-url-quotes": "always",
    "keyframe-declaration-no-important": true,
    "length-zero-no-unit": true,
    "max-nesting-depth": 4,
    "media-feature-name-no-unknown": true,
    "no-descending-specificity": null,
    "no-duplicate-at-import-rules": true,
    "no-duplicate-selectors": true,
    "no-empty-source": true,
    "no-invalid-double-slash-comments": true,
    "no-unknown-animations": true,
    "number-max-precision": null,
    "property-no-unknown": true,
    "property-no-vendor-prefix": true,
    "selector-class-pattern": null,
    "selector-id-pattern": null,
    "selector-max-attribute": 2,
    "selector-max-class": 4,
    "selector-max-combinators": 4,
    "selector-max-compound-selectors": 4,
    "selector-max-id": 0,
    "selector-max-pseudo-class": 5,
    "selector-max-specificity": "0,4,2",
    "selector-max-type": 3,
    "selector-max-universal": 2,
    "selector-no-qualifying-type": [true, { "ignore": ["attribute"] }],
    "selector-no-vendor-prefix": true,
    "selector-pseudo-class-no-unknown": true,
    "selector-pseudo-element-no-unknown": true,
    "selector-type-case": "lower",
    "shorthand-property-no-redundant-values": true,
    "unit-no-unknown": true,
    "unit-allowed-list": [
      "em",
      "rem",
      "%",
      "s",
      "ms",
      "ch",
      "vh",
      "vw",
      "deg",
      "fr"
    ],
    "value-keyword-case": null,
    "value-no-vendor-prefix": true,

    "a11y/no-outline-none": true,
    "a11y/selector-pseudo-class-focus": true,
    "a11y/font-size-is-readable": [true, { "severity": "warning" }],
    "a11y/no-spread-text": [true, { "severity": "warning" }],
    "a11y/no-obsolete-attribute": [true, { "severity": "warning" }],
    "a11y/no-obsolete-element": [true, { "severity": "warning" }],
    "a11y/no-text-align-justify": [true, { "severity": "error" }],

    "plugin/declaration-block-no-ignored-properties": true,

    "plugin/no-unsupported-browser-features": [
      true,
      {
        "severity": "warning",
        "ignore": [
          "calc",
          "css-featurequeries",
          "css-gradients",
          "flexbox",
          "multicolumn",
          "outline",
          "viewport-units"
        ]
      }
    ],

    "scss/at-extend-no-missing-placeholder": [true, { "severity": "warning" }],
    "scss/at-mixin-pattern": null,
    "scss/at-import-no-partial-leading-underscore": true,
    "scss/comment-no-loud": true,
    "scss/declaration-nested-properties": "never",
    "scss/dollar-variable-colon-space-after": "always",
    "scss/dollar-variable-colon-space-before": "never",
    "scss/dollar-variable-no-missing-interpolation": true,
    "scss/double-slash-comment-whitespace-inside": "always",
    "scss/no-global-function-names": null,
    "scss/operator-no-unspaced": true,
    "scss/partial-no-import": true,
    "scss/percent-placeholder-pattern": null,
    "scss/selector-no-redundant-nesting-selector": true
  }
}