index.js

module.exports = {
  rules: {
    'color-hex-case': 'lower',
    'color-hex-length': 'short',
    'color-named': 'never',
    'color-no-invalid-hex': true,
    'font-family-name-quotes': 'always-unless-keyword',
    'font-family-no-duplicate-names': true,
    'font-weight-notation': 'numeric',
    'function-calc-no-unspaced-operator': true,
    'function-comma-newline-after': 'never-multi-line',
    'function-comma-newline-before': 'never-multi-line',
    'function-comma-space-after': 'always',
    'function-comma-space-before': 'never',
    'function-linear-gradient-no-nonstandard-direction': true,
    'function-max-empty-lines': 0,
    'function-name-case': 'lower',
    'function-parentheses-newline-inside': 'never-multi-line',
    'function-parentheses-space-inside': 'never',
    'function-url-quotes': [
      'always',
      {
        except: ['empty'],
      },
    ],
    'function-whitespace-after': 'always',
    'number-max-precision': 4,
    'number-no-trailing-zeros': true,
    'string-no-newline': true,
    'string-quotes': 'single',
    'length-zero-no-unit': true,
    'unit-case': 'lower',
    'unit-no-unknown': true,
    'value-keyword-case': 'lower',
    'value-no-vendor-prefix': true,
    'value-list-comma-space-after': 'always',
    'value-list-comma-space-before': 'never',
    'value-list-max-empty-lines': 0,
    'shorthand-property-no-redundant-values': true,
    'property-case': 'lower',
    'property-no-unknown': true,
    'keyframe-declaration-no-important': true,
    'declaration-bang-space-after': 'never',
    'declaration-bang-space-before': 'always',
    'declaration-colon-space-after': 'always',
    'declaration-colon-space-before': 'never',
    'declaration-empty-line-before': [
      'never',
      {
        ignore: ['after-comment'],
      },
    ],
    'declaration-no-important': true,
    'declaration-block-no-duplicate-properties': true,
    'declaration-block-no-redundant-longhand-properties': true,
    'declaration-block-no-shorthand-property-overrides': true,
    'declaration-block-semicolon-newline-after': 'always',
    'declaration-block-semicolon-space-before': 'never',
    'declaration-block-single-line-max-declarations': 0,
    'declaration-block-trailing-semicolon': 'always',

    'block-closing-brace-empty-line-before': 'never',
    'block-closing-brace-newline-after': 'always',
    'block-closing-brace-newline-before': 'always',
    'block-no-empty': true,
    'block-opening-brace-newline-after': 'always',
    'block-opening-brace-space-before': 'always',
    'selector-attribute-brackets-space-inside': 'never',
    'selector-attribute-operator-space-after': 'never',
    'selector-attribute-operator-space-before': 'never',
    'selector-attribute-quotes': 'always',
    'selector-combinator-space-after': 'always',
    'selector-combinator-space-before': 'always',
    'selector-descendant-combinator-no-non-space': true,
    'selector-max-compound-selectors': 4,
    'selector-max-attribute': 0,
    'selector-pseudo-class-case': 'lower',
    'selector-pseudo-class-no-unknown': true,
    'selector-pseudo-class-parentheses-space-inside': 'never',
    'selector-pseudo-element-case': 'lower',
    'selector-pseudo-element-colon-notation': 'double',
    'selector-pseudo-element-no-unknown': true,
    'selector-type-case': 'lower',
    'selector-type-no-unknown': true,
    'selector-max-empty-lines': 0,
    'selector-list-comma-newline-after': 'always',
    'selector-list-comma-newline-before': 'never-multi-line',
    'media-feature-colon-space-after': 'always',
    'media-feature-colon-space-before': 'never',
    'media-feature-name-case': 'lower',
    'media-feature-name-no-unknown': true,
    'media-feature-parentheses-space-inside': 'never',
    'media-feature-range-operator-space-after': 'always',
    'media-feature-range-operator-space-before': 'always',
    'media-query-list-comma-space-after': 'always',
    'media-query-list-comma-space-before': 'never',
    'at-rule-empty-line-before': [
      'always',
      {
        except: ['first-nested'],
        ignore: ['after-comment', 'blockless-after-same-name-blockless'],
      },
    ],
    'at-rule-name-case': 'lower',
    'at-rule-name-space-after': 'always',
    'at-rule-no-unknown': true,
    'at-rule-no-vendor-prefix': true,
    'at-rule-semicolon-newline-after': 'always',

    'comment-empty-line-before': [
      'always',
      {
        except: ['first-nested'],
        ignore: ['after-comment', 'stylelint-commands'],
        ignoreComments: [
          'critical-desktop:start',
          'critical-desktop:end',
          'critical-mobile:start',
          'critical-mobile:end',
        ],
      },
    ],
    'comment-no-empty': true,
    'comment-word-blacklist': ['dupa'],
    indentation: 4,
    'max-empty-lines': 1,
    'max-line-length': 120,
    'max-nesting-depth': 6,
    'no-duplicate-selectors': true,
    'no-empty-source': true,
    'no-eol-whitespace': [
      true,
      {
        ignore: ['empty-lines'],
      },
    ],
    'no-extra-semicolons': true,
    'no-missing-end-of-source-newline': true,
    'no-unknown-animations': [true, { severity: 'warning' }],
  },
};