index.js

module.exports = {
  plugins: ['stylelint-scss'],
  rules: {
    'at-rule-blacklist': ['debug'],
    'at-rule-no-vendor-prefix': true,
    'at-rule-empty-line-before': [
      'always',
      {
        except: ['blockless-after-same-name-blockless', 'first-nested'],
        ignore: ['after-comment'],
      },
    ],
    'block-no-empty': true,
    'block-opening-brace-space-before': 'always',
    'block-closing-brace-empty-line-before': 'never',
    'color-hex-case': 'lower',
    'color-hex-length': 'short',
    'color-named': 'never',
    'color-no-invalid-hex': true,
    'function-parentheses-space-inside': 'never-single-line',
    'declaration-bang-space-after': 'never',
    'declaration-no-important': true,
    'declaration-bang-space-before': 'always',
    'declaration-empty-line-before': 'never',
    'declaration-block-semicolon-newline-after': 'always',
    'declaration-block-no-duplicate-properties': true,
    'declaration-block-semicolon-space-before': 'never',
    'declaration-block-single-line-max-declarations': 1,
    'declaration-block-trailing-semicolon': 'always',
    'declaration-colon-space-after': 'always-single-line',
    'declaration-colon-space-before': 'never',
    'declaration-property-value-blacklist': {
      '/^border/': ['none'],
    },
    'function-comma-space-after': 'always-single-line',
    'function-url-quotes': 'always',
    indentation: 2,
    'length-zero-no-unit': true,
    'max-nesting-depth': 4,
    'max-empty-lines': 1,
    'media-feature-name-no-vendor-prefix': true,
    'media-feature-parentheses-space-inside': 'never',
    'no-missing-end-of-source-newline': true,
    'no-eol-whitespace': true,
    'number-leading-zero': 'always',
    'number-no-trailing-zeros': true,
    'property-no-unknown': true,
    'property-no-vendor-prefix': true,
    'rule-empty-line-before': [
      'always-multi-line',
      {
        except: ['first-nested'],
        ignore: ['after-comment'],
      },
    ],
    'scss/at-extend-no-missing-placeholder': true,
    'scss/at-function-pattern': '^[a-z]+([a-z0-9-]+[a-z0-9]+)?$',
    'scss/at-import-no-partial-leading-underscore': true,
    'scss/at-import-partial-extension-blacklist': ['scss'],
    'scss/at-mixin-pattern': '^[a-z]+([a-z0-9-]+[a-z0-9]+)?$',
    'scss/dollar-variable-colon-space-after': 'always',
    'scss/dollar-variable-colon-space-before': 'never',
    'scss/dollar-variable-pattern': '^[_]?[a-z]+([a-z0-9-]+[a-z0-9]+)?$',
    'scss/percent-placeholder-pattern': '^[a-z]+([a-z0-9-]+[a-z0-9]+)?$',
    'scss/selector-no-redundant-nesting-selector': true,
    'selector-list-comma-newline-after': 'always',
    'selector-max-compound-selectors': 4,
    'selector-max-id': 0,
    'selector-no-qualifying-type': true,
    'selector-no-vendor-prefix': true,
    'selector-pseudo-element-colon-notation': 'double',
    'selector-pseudo-element-no-unknown': true,
    'string-quotes': 'single',
    'value-no-vendor-prefix': true,
  },
}