stylelint.config.js

 module.exports = {
    extends: ['stylelint-config-recommended'],
    rules: {
      'color-no-invalid-hex': true,
      'font-family-no-duplicate-names': true,
      'function-calc-no-unspaced-operator': true,
      'unit-no-unknown': true,
      'block-no-empty': true,
      'selector-pseudo-class-no-unknown': true,
      'selector-pseudo-element-no-unknown': true,
      'media-feature-name-no-unknown': true,
      'at-rule-no-unknown': null,
      'comment-no-empty': true,
      'no-duplicate-at-import-rules': true,
      'no-extra-semicolons': true,
      'no-invalid-double-slash-comments': true,
      'declaration-no-important': true,
      'declaration-block-single-line-max-declarations': 1,
      'max-nesting-depth': 5,
      'number-leading-zero': 'always',
      'number-no-trailing-zeros': true,
      'string-quotes': 'single',
      'unit-case': 'lower',
      'value-list-max-empty-lines': 0,
      'property-case': 'lower',
      'declaration-colon-space-after': 'always',
      'declaration-colon-space-before': 'never',
      'declaration-block-semicolon-newline-after': 'always-multi-line',
      'declaration-block-semicolon-space-before': 'never',
      'declaration-block-trailing-semicolon': 'always',
      'block-opening-brace-space-before': 'always',
      'selector-pseudo-class-case': 'lower',
      'selector-pseudo-element-case': 'lower',
      'selector-type-case': 'lower',
      'media-feature-colon-space-after': 'always',
      'media-feature-colon-space-before': 'never',
      'media-feature-name-case': 'lower',
      'comment-whitespace-inside': 'always'
    }
  };