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# Rules Rules determine what the linter looks for and complains about. All the rules are turned off by default and none have default values for their options. The rules follow a consistent naming convention and have been designed to work in conjunction with one another, you can read more about this in the ["About rules"](about-rules.md) section. The built-in rules are geared towards standard CSS syntax. With the exception of the `indentation` rule, all the rules will ignore structures that contain non-standard syntax e.g. variable interpolation and mixins. In addition to these rules there are [plugins](plugins.md), which are rules built by the community that support methodologies, toolsets, *non-standard* CSS features, or very specific use cases. Don't forget to look at the list of [plugins](plugins.md) for more ways to lint. ## List of rules Here are all the rules within stylelint, grouped first [by category](../../VISION.md) and then by the [*thing*](http://apps.workflower.fi/vocabs/css/en) they apply to. - [Possible errors](#possible-errors) - [Limit language features](#limit-language-features) - [Stylistic issues](#stylistic-issues) ### Possible errors #### Color - [`color-no-invalid-hex`](../../lib/rules/color-no-invalid-hex/README.md): Disallow invalid hex colors. #### Font family - [`font-family-no-duplicate-names`](../../lib/rules/font-family-no-duplicate-names/README.md): Disallow duplicate font family names. - [`font-family-no-missing-generic-family-keyword`](../../lib/rules/font-family-no-missing-generic-family-keyword/README.md): Disallow missing generic families in lists of font family names. #### Function - [`function-calc-no-invalid`](../../lib/rules/function-calc-no-invalid/README.md): Disallow an invalid expression within `calc` functions. - [`function-calc-no-unspaced-operator`](../../lib/rules/function-calc-no-unspaced-operator/README.md): Disallow an unspaced operator within `calc` functions. - [`function-linear-gradient-no-nonstandard-direction`](../../lib/rules/function-linear-gradient-no-nonstandard-direction/README.md): Disallow direction values in `linear-gradient()` calls that are not valid according to the [standard syntax](https://developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient#Syntax). #### String - [`string-no-newline`](../../lib/rules/string-no-newline/README.md): Disallow (unescaped) newlines in strings. #### Unit - [`unit-no-unknown`](../../lib/rules/unit-no-unknown/README.md): Disallow unknown units. #### Property - [`property-no-unknown`](../../lib/rules/property-no-unknown/README.md): Disallow unknown properties. #### Keyframe declaration - [`keyframe-declaration-no-important`](../../lib/rules/keyframe-declaration-no-important/README.md): Disallow `!important` within keyframe declarations. #### Declaration block - [`declaration-block-no-duplicate-properties`](../../lib/rules/declaration-block-no-duplicate-properties/README.md): Disallow duplicate properties within declaration blocks. - [`declaration-block-no-shorthand-property-overrides`](../../lib/rules/declaration-block-no-shorthand-property-overrides/README.md): Disallow shorthand properties that override related longhand properties. #### Block - [`block-no-empty`](../../lib/rules/block-no-empty/README.md): Disallow empty blocks. #### Selector - [`selector-pseudo-class-no-unknown`](../../lib/rules/selector-pseudo-class-no-unknown/README.md): Disallow unknown pseudo-class selectors. - [`selector-pseudo-element-no-unknown`](../../lib/rules/selector-pseudo-element-no-unknown/README.md): Disallow unknown pseudo-element selectors. - [`selector-type-no-unknown`](../../lib/rules/selector-type-no-unknown/README.md): Disallow unknown type selectors. #### Media feature - [`media-feature-name-no-unknown`](../../lib/rules/media-feature-name-no-unknown/README.md): Disallow unknown media feature names. #### At-rule - [`at-rule-no-unknown`](../../lib/rules/at-rule-no-unknown/README.md): Disallow unknown at-rules. #### Comment - [`comment-no-empty`](../../lib/rules/comment-no-empty/README.md): Disallow empty comments. #### General / Sheet - [`no-descending-specificity`](../../lib/rules/no-descending-specificity/README.md): Disallow selectors of lower specificity from coming after overriding selectors of higher specificity. - [`no-duplicate-at-import-rules`](../../lib/rules/no-duplicate-at-import-rules/README.md): Disallow duplicate `@import` rules within a stylesheet. - [`no-duplicate-selectors`](../../lib/rules/no-duplicate-selectors/README.md): Disallow duplicate selectors within a stylesheet. - [`no-empty-source`](../../lib/rules/no-empty-source/README.md): Disallow empty sources. - [`no-extra-semicolons`](../../lib/rules/no-extra-semicolons/README.md): Disallow extra semicolons (Autofixable). - [`no-invalid-double-slash-comments`](../../lib/rules/no-invalid-double-slash-comments/README.md): Disallow double-slash comments (`//...`) which are not supported by CSS. ### Limit language features #### Color - [`color-named`](../../lib/rules/color-named/README.md): Require (where possible) or disallow named colors. - [`color-no-hex`](../../lib/rules/color-no-hex/README.md): Disallow hex colors. #### Function - [`function-blacklist`](../../lib/rules/function-blacklist/README.md): Specify a blacklist of disallowed functions. - [`function-url-no-scheme-relative`](../../lib/rules/function-url-no-scheme-relative/README.md): Disallow scheme-relative urls. - [`function-url-scheme-blacklist`](../../lib/rules/function-url-scheme-blacklist/README.md): Specify a blacklist of disallowed URL schemes. - [`function-url-scheme-whitelist`](../../lib/rules/function-url-scheme-whitelist/README.md): Specify a whitelist of allowed URL schemes. - [`function-whitelist`](../../lib/rules/function-whitelist/README.md): Specify a whitelist of allowed functions. #### Keyframes - [`keyframes-name-pattern`](../../lib/rules/keyframes-name-pattern/README.md): Specify a pattern for keyframe names. #### Number - [`number-max-precision`](../../lib/rules/number-max-precision/README.md): Limit the number of decimal places allowed in numbers. #### Time - [`time-min-milliseconds`](../../lib/rules/time-min-milliseconds/README.md): Specify the minimum number of milliseconds for time values. #### Unit - [`unit-blacklist`](../../lib/rules/unit-blacklist/README.md): Specify a blacklist of disallowed units. - [`unit-whitelist`](../../lib/rules/unit-whitelist/README.md): Specify a whitelist of allowed units. #### Shorthand property - [`shorthand-property-no-redundant-values`](../../lib/rules/shorthand-property-no-redundant-values/README.md): Disallow redundant values in shorthand properties (Autofixable). #### Value - [`value-no-vendor-prefix`](../../lib/rules/value-no-vendor-prefix/README.md): Disallow vendor prefixes for values. #### Custom property - [`custom-property-pattern`](../../lib/rules/custom-property-pattern/README.md): Specify a pattern for custom properties. #### Property - [`property-blacklist`](../../lib/rules/property-blacklist/README.md): Specify a blacklist of disallowed properties. - [`property-no-vendor-prefix`](../../lib/rules/property-no-vendor-prefix/README.md): Disallow vendor prefixes for properties. - [`property-whitelist`](../../lib/rules/property-whitelist/README.md): Specify a whitelist of allowed properties. #### Declaration - [`declaration-block-no-redundant-longhand-properties`](../../lib/rules/declaration-block-no-redundant-longhand-properties/README.md): Disallow longhand properties that can be combined into one shorthand property. - [`declaration-no-important`](../../lib/rules/declaration-no-important/README.md): Disallow `!important` within declarations. - [`declaration-property-unit-blacklist`](../../lib/rules/declaration-property-unit-blacklist/README.md): Specify a blacklist of disallowed property and unit pairs within declarations. - [`declaration-property-unit-whitelist`](../../lib/rules/declaration-property-unit-whitelist/README.md): Specify a whitelist of allowed property and unit pairs within declarations. - [`declaration-property-value-blacklist`](../../lib/rules/declaration-property-value-blacklist/README.md): Specify a blacklist of disallowed property and value pairs within declarations. - [`declaration-property-value-whitelist`](../../lib/rules/declaration-property-value-whitelist/README.md): Specify a whitelist of allowed property and value pairs within declarations. #### Declaration block - [`declaration-block-single-line-max-declarations`](../../lib/rules/declaration-block-single-line-max-declarations/README.md): Limit the number of declarations within a single-line declaration block. #### Selector - [`selector-attribute-operator-blacklist`](../../lib/rules/selector-attribute-operator-blacklist/README.md): Specify a blacklist of disallowed attribute operators. - [`selector-attribute-operator-whitelist`](../../lib/rules/selector-attribute-operator-whitelist/README.md): Specify a whitelist of allowed attribute operators. - [`selector-class-pattern`](../../lib/rules/selector-class-pattern/README.md): Specify a pattern for class selectors. - [`selector-combinator-blacklist`](../../lib/rules/selector-combinator-blacklist/README.md): Specify a blacklist of disallowed combinators. - [`selector-combinator-whitelist`](../../lib/rules/selector-combinator-whitelist/README.md): Specify a whitelist of allowed combinators. - [`selector-id-pattern`](../../lib/rules/selector-id-pattern/README.md): Specify a pattern for ID selectors. - [`selector-max-attribute`](../../lib/rules/selector-max-attribute/README.md): Limit the number of attribute selectors in a selector. - [`selector-max-class`](../../lib/rules/selector-max-class/README.md): Limit the number of classes in a selector. - [`selector-max-combinators`](../../lib/rules/selector-max-combinators/README.md): Limit the number of combinators in a selector. - [`selector-max-compound-selectors`](../../lib/rules/selector-max-compound-selectors/README.md): Limit the number of compound selectors in a selector. - [`selector-max-empty-lines`](../../lib/rules/selector-max-empty-lines/README.md): Limit the number of adjacent empty lines within selectors (Autofixable). - [`selector-max-id`](../../lib/rules/selector-max-id/README.md): Limit the number of ID selectors in a selector. - [`selector-max-pseudo-class`](../../lib/rules/selector-max-pseudo-class/README.md): Limit the number of pseudo-classes in a selector. - [`selector-max-specificity`](../../lib/rules/selector-max-specificity/README.md): Limit the specificity of selectors. - [`selector-max-type`](../../lib/rules/selector-max-type/README.md): Limit the number of type in a selector. - [`selector-max-universal`](../../lib/rules/selector-max-universal/README.md): Limit the number of universal selectors in a selector. - [`selector-nested-pattern`](../../lib/rules/selector-nested-pattern/README.md): Specify a pattern for the selectors of rules nested within rules. - [`selector-no-qualifying-type`](../../lib/rules/selector-no-qualifying-type/README.md): Disallow qualifying a selector by type. - [`selector-no-vendor-prefix`](../../lib/rules/selector-no-vendor-prefix/README.md): Disallow vendor prefixes for selectors. - [`selector-pseudo-class-blacklist`](../../lib/rules/selector-pseudo-class-blacklist/README.md): Specify a blacklist of disallowed pseudo-class selectors. - [`selector-pseudo-class-whitelist`](../../lib/rules/selector-pseudo-class-whitelist/README.md): Specify a whitelist of allowed pseudo-class selectors. - [`selector-pseudo-element-blacklist`](../../lib/rules/selector-pseudo-element-blacklist/README.md): Specify a blacklist of disallowed pseudo-element selectors. - [`selector-pseudo-element-whitelist`](../../lib/rules/selector-pseudo-element-whitelist/README.md): Specify a whitelist of allowed pseudo-element selectors. #### Media feature - [`media-feature-name-blacklist`](../../lib/rules/media-feature-name-blacklist/README.md): Specify a blacklist of disallowed media feature names. - [`media-feature-name-no-vendor-prefix`](../../lib/rules/media-feature-name-no-vendor-prefix/README.md): Disallow vendor prefixes for media feature names. - [`media-feature-name-value-whitelist`](../../lib/rules/media-feature-name-value-whitelist/README.md): Specify a whitelist of allowed media feature name and value pairs. - [`media-feature-name-whitelist`](../../lib/rules/media-feature-name-whitelist/README.md): Specify a whitelist of allowed media feature names. #### Custom media - [`custom-media-pattern`](../../lib/rules/custom-media-pattern/README.md): Specify a pattern for custom media query names. #### At-rule - [`at-rule-blacklist`](../../lib/rules/at-rule-blacklist/README.md): Specify a blacklist of disallowed at-rules. - [`at-rule-no-vendor-prefix`](../../lib/rules/at-rule-no-vendor-prefix/README.md): Disallow vendor prefixes for at-rules. - [`at-rule-property-requirelist`](../../lib/rules/at-rule-property-requirelist/README.md): Specify a requirelist of properties for an at-rule. - [`at-rule-whitelist`](../../lib/rules/at-rule-whitelist/README.md): Specify a whitelist of allowed at-rules. #### Comment - [`comment-word-blacklist`](../../lib/rules/comment-word-blacklist/README.md): Specify a blacklist of disallowed words within comments. #### General / Sheet - [`max-nesting-depth`](../../lib/rules/max-nesting-depth/README.md): Limit the depth of nesting. - [`no-unknown-animations`](../../lib/rules/no-unknown-animations/README.md): Disallow unknown animations. ### Stylistic issues #### Color - [`color-hex-case`](../../lib/rules/color-hex-case/README.md): Specify lowercase or uppercase for hex colors (Autofixable). - [`color-hex-length`](../../lib/rules/color-hex-length/README.md): Specify short or long notation for hex colors (Autofixable). #### Font family - [`font-family-name-quotes`](../../lib/rules/font-family-name-quotes/README.md): Specify whether or not quotation marks should be used around font family names. #### Font weight - [`font-weight-notation`](../../lib/rules/font-weight-notation/README.md): Require numeric or named (where possible) `font-weight` values. Also, when named values are expected, require only valid names. #### Function - [`function-comma-newline-after`](../../lib/rules/function-comma-newline-after/README.md): Require a newline or disallow whitespace after the commas of functions (Autofixable). - [`function-comma-newline-before`](../../lib/rules/function-comma-newline-before/README.md): Require a newline or disallow whitespace before the commas of functions (Autofixable). - [`function-comma-space-after`](../../lib/rules/function-comma-space-after/README.md): Require a single space or disallow whitespace after the commas of functions (Autofixable). - [`function-comma-space-before`](../../lib/rules/function-comma-space-before/README.md): Require a single space or disallow whitespace before the commas of functions (Autofixable). - [`function-max-empty-lines`](../../lib/rules/function-max-empty-lines/README.md): Limit the number of adjacent empty lines within functions (Autofixable). - [`function-name-case`](../../lib/rules/function-name-case/README.md): Specify lowercase or uppercase for function names (Autofixable). - [`function-parentheses-newline-inside`](../../lib/rules/function-parentheses-newline-inside/README.md): Require a newline or disallow whitespace on the inside of the parentheses of functions (Autofixable). - [`function-parentheses-space-inside`](../../lib/rules/function-parentheses-space-inside/README.md): Require a single space or disallow whitespace on the inside of the parentheses of functions (Autofixable). - [`function-url-quotes`](../../lib/rules/function-url-quotes/README.md): Require or disallow quotes for urls. - [`function-whitespace-after`](../../lib/rules/function-whitespace-after/README.md): Require or disallow whitespace after functions (Autofixable). #### Number - [`number-leading-zero`](../../lib/rules/number-leading-zero/README.md): Require or disallow a leading zero for fractional numbers less than 1 (Autofixable). - [`number-no-trailing-zeros`](../../lib/rules/number-no-trailing-zeros/README.md): Disallow trailing zeros in numbers (Autofixable). #### String - [`string-quotes`](../../lib/rules/string-quotes/README.md): Specify single or double quotes around strings (Autofixable). #### Length - [`length-zero-no-unit`](../../lib/rules/length-zero-no-unit/README.md): Disallow units for zero lengths (Autofixable). #### Unit - [`unit-case`](../../lib/rules/unit-case/README.md): Specify lowercase or uppercase for units (Autofixable). #### Value - [`value-keyword-case`](../../lib/rules/value-keyword-case/README.md): Specify lowercase or uppercase for keywords values (Autofixable). #### Value list - [`value-list-comma-newline-after`](../../lib/rules/value-list-comma-newline-after/README.md): Require a newline or disallow whitespace after the commas of value lists (Autofixable). - [`value-list-comma-newline-before`](../../lib/rules/value-list-comma-newline-before/README.md): Require a newline or disallow whitespace before the commas of value lists. - [`value-list-comma-space-after`](../../lib/rules/value-list-comma-space-after/README.md): Require a single space or disallow whitespace after the commas of value lists (Autofixable). - [`value-list-comma-space-before`](../../lib/rules/value-list-comma-space-before/README.md): Require a single space or disallow whitespace before the commas of value lists (Autofixable). - [`value-list-max-empty-lines`](../../lib/rules/value-list-max-empty-lines/README.md): Limit the number of adjacent empty lines within value lists (Autofixable). #### Custom property - [`custom-property-empty-line-before`](../../lib/rules/custom-property-empty-line-before/README.md): Require or disallow an empty line before custom properties (Autofixable). #### Property - [`property-case`](../../lib/rules/property-case/README.md): Specify lowercase or uppercase for properties (Autofixable). #### Declaration - [`declaration-bang-space-after`](../../lib/rules/declaration-bang-space-after/README.md): Require a single space or disallow whitespace after the bang of declarations (Autofixable). - [`declaration-bang-space-before`](../../lib/rules/declaration-bang-space-before/README.md): Require a single space or disallow whitespace before the bang of declarations (Autofixable). - [`declaration-colon-newline-after`](../../lib/rules/declaration-colon-newline-after/README.md): Require a newline or disallow whitespace after the colon of declarations (Autofixable). - [`declaration-colon-space-after`](../../lib/rules/declaration-colon-space-after/README.md): Require a single space or disallow whitespace after the colon of declarations (Autofixable). - [`declaration-colon-space-before`](../../lib/rules/declaration-colon-space-before/README.md): Require a single space or disallow whitespace before the colon of declarations (Autofixable). - [`declaration-empty-line-before`](../../lib/rules/declaration-empty-line-before/README.md): Require or disallow an empty line before declarations (Autofixable). #### Declaration block - [`declaration-block-semicolon-newline-after`](../../lib/rules/declaration-block-semicolon-newline-after/README.md): Require a newline or disallow whitespace after the semicolons of declaration blocks (Autofixable). - [`declaration-block-semicolon-newline-before`](../../lib/rules/declaration-block-semicolon-newline-before/README.md): Require a newline or disallow whitespace before the semicolons of declaration blocks. - [`declaration-block-semicolon-space-after`](../../lib/rules/declaration-block-semicolon-space-after/README.md): Require a single space or disallow whitespace after the semicolons of declaration blocks (Autofixable). - [`declaration-block-semicolon-space-before`](../../lib/rules/declaration-block-semicolon-space-before/README.md): Require a single space or disallow whitespace before the semicolons of declaration blocks (Autofixable). - [`declaration-block-trailing-semicolon`](../../lib/rules/declaration-block-trailing-semicolon/README.md): Require or disallow a trailing semicolon within declaration blocks (Autofixable). #### Block - [`block-closing-brace-empty-line-before`](../../lib/rules/block-closing-brace-empty-line-before/README.md): Require or disallow an empty line before the closing brace of blocks (Autofixable). - [`block-closing-brace-newline-after`](../../lib/rules/block-closing-brace-newline-after/README.md): Require a newline or disallow whitespace after the closing brace of blocks (Autofixable). - [`block-closing-brace-newline-before`](../../lib/rules/block-closing-brace-newline-before/README.md): Require a newline or disallow whitespace before the closing brace of blocks (Autofixable). - [`block-closing-brace-space-after`](../../lib/rules/block-closing-brace-space-after/README.md): Require a single space or disallow whitespace after the closing brace of blocks. - [`block-closing-brace-space-before`](../../lib/rules/block-closing-brace-space-before/README.md): Require a single space or disallow whitespace before the closing brace of blocks (Autofixable). - [`block-opening-brace-newline-after`](../../lib/rules/block-opening-brace-newline-after/README.md): Require a newline after the opening brace of blocks (Autofixable). - [`block-opening-brace-newline-before`](../../lib/rules/block-opening-brace-newline-before/README.md): Require a newline or disallow whitespace before the opening brace of blocks (Autofixable). - [`block-opening-brace-space-after`](../../lib/rules/block-opening-brace-space-after/README.md): Require a single space or disallow whitespace after the opening brace of blocks (Autofixable). - [`block-opening-brace-space-before`](../../lib/rules/block-opening-brace-space-before/README.md): Require a single space or disallow whitespace before the opening brace of blocks (Autofixable). #### Selector - [`selector-attribute-brackets-space-inside`](../../lib/rules/selector-attribute-brackets-space-inside/README.md): Require a single space or disallow whitespace on the inside of the brackets within attribute selectors (Autofixable). - [`selector-attribute-operator-space-after`](../../lib/rules/selector-attribute-operator-space-after/README.md): Require a single space or disallow whitespace after operators within attribute selectors (Autofixable). - [`selector-attribute-operator-space-before`](../../lib/rules/selector-attribute-operator-space-before/README.md): Require a single space or disallow whitespace before operators within attribute selectors (Autofixable). - [`selector-attribute-quotes`](../../lib/rules/selector-attribute-quotes/README.md): Require or disallow quotes for attribute values. - [`selector-combinator-space-after`](../../lib/rules/selector-combinator-space-after/README.md): Require a single space or disallow whitespace after the combinators of selectors (Autofixable). - [`selector-combinator-space-before`](../../lib/rules/selector-combinator-space-before/README.md): Require a single space or disallow whitespace before the combinators of selectors (Autofixable). - [`selector-descendant-combinator-no-non-space`](../../lib/rules/selector-descendant-combinator-no-non-space/README.md): Disallow non-space characters for descendant combinators of selectors (Autofixable). - [`selector-pseudo-class-case`](../../lib/rules/selector-pseudo-class-case/README.md): Specify lowercase or uppercase for pseudo-class selectors (Autofixable). - [`selector-pseudo-class-parentheses-space-inside`](../../lib/rules/selector-pseudo-class-parentheses-space-inside/README.md): Require a single space or disallow whitespace on the inside of the parentheses within pseudo-class selectors (Autofixable). - [`selector-pseudo-element-case`](../../lib/rules/selector-pseudo-element-case/README.md): Specify lowercase or uppercase for pseudo-element selectors. - [`selector-pseudo-element-colon-notation`](../../lib/rules/selector-pseudo-element-colon-notation/README.md): Specify single or double colon notation for applicable pseudo-elements (Autofixable). - [`selector-type-case`](../../lib/rules/selector-type-case/README.md): Specify lowercase or uppercase for type selectors (Autofixable). #### Selector list - [`selector-list-comma-newline-after`](../../lib/rules/selector-list-comma-newline-after/README.md): Require a newline or disallow whitespace after the commas of selector lists (Autofixable). - [`selector-list-comma-newline-before`](../../lib/rules/selector-list-comma-newline-before/README.md): Require a newline or disallow whitespace before the commas of selector lists (Autofixable). - [`selector-list-comma-space-after`](../../lib/rules/selector-list-comma-space-after/README.md): Require a single space or disallow whitespace after the commas of selector lists (Autofixable). - [`selector-list-comma-space-before`](../../lib/rules/selector-list-comma-space-before/README.md): Require a single space or disallow whitespace before the commas of selector lists (Autofixable). #### Rule - [`rule-empty-line-before`](../../lib/rules/rule-empty-line-before/README.md): Require or disallow an empty line before rules (Autofixable). #### Media feature - [`media-feature-colon-space-after`](../../lib/rules/media-feature-colon-space-after/README.md): Require a single space or disallow whitespace after the colon in media features (Autofixable). - [`media-feature-colon-space-before`](../../lib/rules/media-feature-colon-space-before/README.md): Require a single space or disallow whitespace before the colon in media features (Autofixable). - [`media-feature-name-case`](../../lib/rules/media-feature-name-case/README.md): Specify lowercase or uppercase for media feature names (Autofixable). - [`media-feature-parentheses-space-inside`](../../lib/rules/media-feature-parentheses-space-inside/README.md): Require a single space or disallow whitespace on the inside of the parentheses within media features (Autofixable). - [`media-feature-range-operator-space-after`](../../lib/rules/media-feature-range-operator-space-after/README.md): Require a single space or disallow whitespace after the range operator in media features (Autofixable). - [`media-feature-range-operator-space-before`](../../lib/rules/media-feature-range-operator-space-before/README.md): Require a single space or disallow whitespace before the range operator in media features (Autofixable). #### Media query list - [`media-query-list-comma-newline-after`](../../lib/rules/media-query-list-comma-newline-after/README.md): Require a newline or disallow whitespace after the commas of media query lists (Autofixable). - [`media-query-list-comma-newline-before`](../../lib/rules/media-query-list-comma-newline-before/README.md): Require a newline or disallow whitespace before the commas of media query lists. - [`media-query-list-comma-space-after`](../../lib/rules/media-query-list-comma-space-after/README.md): Require a single space or disallow whitespace after the commas of media query lists (Autofixable). - [`media-query-list-comma-space-before`](../../lib/rules/media-query-list-comma-space-before/README.md): Require a single space or disallow whitespace before the commas of media query lists (Autofixable). #### At-rule - [`at-rule-empty-line-before`](../../lib/rules/at-rule-empty-line-before/README.md): Require or disallow an empty line before at-rules (Autofixable). - [`at-rule-name-case`](../../lib/rules/at-rule-name-case/README.md): Specify lowercase or uppercase for at-rules names (Autofixable). - [`at-rule-name-newline-after`](../../lib/rules/at-rule-name-newline-after/README.md): Require a newline after at-rule names. - [`at-rule-name-space-after`](../../lib/rules/at-rule-name-space-after/README.md): Require a single space after at-rule names (Autofixable). - [`at-rule-semicolon-newline-after`](../../lib/rules/at-rule-semicolon-newline-after/README.md): Require a newline after the semicolon of at-rules (Autofixable). - [`at-rule-semicolon-space-before`](../../lib/rules/at-rule-semicolon-space-before/README.md): Require a single space or disallow whitespace before the semicolons of at-rules. #### Comment - [`comment-empty-line-before`](../../lib/rules/comment-empty-line-before/README.md): Require or disallow an empty line before comments (Autofixable). - [`comment-whitespace-inside`](../../lib/rules/comment-whitespace-inside/README.md): Require or disallow whitespace on the inside of comment markers (Autofixable). #### General / Sheet - [`indentation`](../../lib/rules/indentation/README.md): Specify indentation (Autofixable). - [`linebreaks`](../../lib/rules/linebreaks/README.md): Specify unix or windows linebreaks (Autofixable). - [`max-empty-lines`](../../lib/rules/max-empty-lines/README.md): Limit the number of adjacent empty lines. - [`max-line-length`](../../lib/rules/max-line-length/README.md): Limit the length of a line. - [`no-eol-whitespace`](../../lib/rules/no-eol-whitespace/README.md): Disallow end-of-line whitespace (Autofixable). - [`no-missing-end-of-source-newline`](../../lib/rules/no-missing-end-of-source-newline/README.md): Disallow missing end-of-source newlines (Autofixable). - [`no-empty-first-line`](../../lib/rules/no-empty-first-line/README.md): Disallow empty first lines (Autofixable).