A stylelint config inspired by sass-guidelin.es.

This linter has been designed / tested with SCSS syntax based on the SCSS guidelines documented in https://sass-guidelin.es/. It is intended for use with SCSS syntax, not Sass (tab style) syntax.

This config:

• includes the stylelint-scss plugin module and turns on rules for SCSS specific code
• includes the @stylistic/stylelint-plugin plugin module and turns on rules for stylistic settings
• includes the postcss-scss custom syntax module and configures it
• has a peer dependency on stylelint
  • You'll need to install this package in your project
• has a peer dependency on postcss
  • You'll need to install this package in your project

Using NPM

$ npm i -D stylelint postcss stylelint-config-sass-guidelines

Using Yarn

$ yarn add -D stylelint postcss stylelint-config-sass-guidelines

Using PNPM

$ pnpm add -D stylelint postcss stylelint-config-sass-guidelines

Set your stylelint config to:

{
  "extends": "stylelint-config-sass-guidelines"
}

Simply add a "rules" key to your config and add your overrides there.

For example:

{
  "extends": "stylelint-config-sass-guidelines",
  "rules": {
    "selector-max-compound-selectors": 4,
    "value-no-vendor-prefix": false
  }
}

This is a list of the lints turned on in this configuration, and what they do.

• at-rule-disallowed-list: Specify a list of disallowed at-rules.
  • "debug" Disallow the use of @debug.
• at-rule-no-unknown: Disallow unknown at-rules.
• at-rule-no-vendor-prefix: Disallow vendor prefixes for at-rules.

• block-no-empty: Disallow empty blocks.

• color-hex-length: Always use short hex notation, where available.
• color-named: Colors must never be named.
• color-no-invalid-hex: Hex values must be valid.

• declaration-block-single-line-max-declarations: There should never be more than 1 declaration per line.

• declaration-property-value-disallowed-list: Specify a list of disallowed property and value pairs within declarations.
  • ^border: Disallow the use of the word none for borders, use 0 instead. The intent of this rule is to enforce consistency, rather than define which is "better."

• function-url-quotes: URLs must always be quoted.

• length-zero-no-unit: Disallow units for zero lengths.
• max-nesting-depth: Limit the allowed nesting depth to 1. Ignore: Nested at-rules @media, @supports, and @include.

• media-feature-name-no-vendor-prefix: Disallow vendor prefixes for media feature names.

• property-no-unknown: Disallow unknown properties
• property-no-vendor-prefix: Disallow vendor prefixes for properties.
• shorthand-property-no-redundant-values: Disallow redundant values in shorthand properties.

• rule-empty-line-before: There must always be an empty line before multi-line rules. Except: Nested rules that are the first of their parent rule. Ignore: Rules that come after a comment.

• scss/at-extend-no-missing-placeholder: Disallow at-extends (@extend) with missing placeholders.
• scss/at-function-pattern: SCSS functions must be written in lowercase and match the regex ^[a-z]+([a-z0-9-]+[a-z0-9]+)?$.
• scss/at-import-partial-extension-disallowed-list: Specify list of disallowed file extensions for partial names in @import commands.
  • .scss: Disallow the use of the .scss file extension in imports.
• scss/at-rule-no-unknown: SCSS mixins must be written in lowercase and match the regex ^[a-z]+([a-z0-9-]+[a-z0-9]+)?$.
• scss/dollar-variable-colon-space-after: Require a single space after the colon in $-variable declarations.
• scss/dollar-variable-colon-space-before: Disallow whitespace before the colon in $-variable declarations.
• scss/dollar-variable-pattern: SCSS variables must be written in lowercase and match the regex ^[a-z]+([a-z0-9-]+[a-z0-9]+)?$.
• scss/load-no-partial-leading-underscore: Disallow leading underscore in partial names in @import.
• scss/no-global-function-names: Disallows the use of global function names, as these global functions are now located inside built-in Sass modules.
• scss/percent-placeholder-pattern: SCSS %-placeholders must be written in lowercase and match the regex ^[a-z]+([a-z0-9-]+[a-z0-9]+)?$.
• scss/selector-no-redundant-nesting-selector: Disallow redundant nesting selectors (&).

• selector-class-pattern: Selectors must be written in lowercase and match the regex ^(?:u|is|has)-[a-z][a-zA-Z0-9]*$|^(?!u|is|has)[a-zA-Z][a-zA-Z0-9]*(?:-[a-z][a-zA-Z0-9]*)?(?:--[a-z][a-zA-Z0-9]*)?$.
• selector-max-compound-selectors: Limit the number of compound selectors in a selector to 3.
• selector-max-id: Disallow id selectors.
• selector-no-qualifying-type: Disallow qualifying a selector by type.
• selector-no-vendor-prefix: Disallow vendor prefixes for selectors.
• selector-pseudo-element-colon-notation: Applicable pseudo-elements must always use the double colon notation.
• selector-pseudo-element-no-unknown: Disallow unknown pseudo-element selectors.

• @stylistic/block-opening-brace-space-before: There must always be a single space before the opening brace.

• @stylistic/color-hex-case: Hex colors must be written in lowercase.

• @stylistic/declaration-bang-space-after: There must never be whitespace after the bang.

• @stylistic/declaration-bang-space-before: There must always be a single space before the bang.

• @stylistic/declaration-block-semicolon-newline-after: There must always be a newline after the semicolon.

• @stylistic/declaration-block-semicolon-space-before: There must never be whitespace before the semicolons.

• @stylistic/declaration-block-trailing-semicolon: There must always be a trailing semicolon.

• @stylistic/declaration-colon-space-after: There must always be a single space after the colon if the declaration's value is single-line.

• @stylistic/declaration-colon-space-before: There must never be whitespace before the colon.

• @stylistic/function-comma-space-after: There must always be a single space after the commas in single-line functions.

• @stylistic/function-parentheses-space-inside: There must never be whitespace on the inside of the parentheses of functions.

• @stylistic/indentation: Indentation should always be 2 spaces.

• @stylistic/media-feature-parentheses-space-inside: There must never be whitespace on the inside of the parentheses of media features.

• @stylistic/no-missing-end-of-source-newline: Disallow missing end-of-file newlines in non-empty files.

• @stylistic/number-leading-zero: There must always be a leading zero.

• @stylistic/number-no-trailing-zeros: Disallow trailing zeros in numbers.

• @stylistic/selector-list-comma-newline-after: There must always be a newline after the commas of selector lists.

• @stylistic/string-quotes: Strings must always be wrapped with single quotes.

• value-no-vendor-prefix: Disallow vendor prefixes for values.

stylelint-config-sass-guidelines is maintained by Brett Jankord and contributions from the community. Without the code contributions from all these fantastic people, stylelint-config-sass-guidelines would not exist.