stylelint-config-kyt

kyt Stylelint Linter and CSS/Sass Style Guide

This is an extension of config-standard with some overrides for CSS/Sass Modules.

Table of Contents

1. Install
2. CSS + Sass Guide - Formatting - Comments - ID Selectors - Syntax - Ordering - Variables - Mixins
3. Changelog

Install

Note, installing kyt or setting up a starter-kyt will install this package automatically. If you want to install this linter extension separately, follow these install instructions. If you have kyt installed and you want to override the linter configuration, skip to step (2).

1. Install the stylelint-config-kyt node module:
   npm install stylelint stylelint-config-kyt stylelint-config-standard --save-dev
2. Add an extension to your Stylelint configuration:

{
  "extends": "stylelint-config-nyt",
  "rules": {
    /* If you must, override rules here :P */
  }
}

CSS + Sass Guide

The following guide is best used with the kyt linter against CSS/Sass Modules.

Formatting

• Use soft tabs (2 spaces) for indentation.
• Always use camelCasing in class names.
• Do not use ID selectors.
• Do not use element selectors in CSS Modules files.
• When using multiple selectors in a rule declaration, give each selector its own line.
• Put a space before the opening brace { in rule declarations.
• In properties, put a space after, but not before, the : character.
• Put closing braces } of rule declarations on a new line
• Put blank lines between rule declarations and nested pseudo-selectors.

Bad

.avatar{
    border-radius:50%;
    border:2px solid white; }
.no, .nope, .not_good {
    // ...
}
#lol-no {
  // ...
}

Good

.avatar {
  border-radius: 50%;
  border: 2px solid white;
}

.one,
.selector,
.perLine {
  // ...
}

Comments

• Prefer line comments (// in Sass-land) to block comments.
• Prefer comments on their own line.
• Write detailed comments for code that isn't self-documenting:
  • Uses of z-index
  • Compatibility or browser-specific hacks

ID selectors

While it is possible to select elements by ID in CSS, it should generally be considered an anti-pattern. ID selectors introduce an unnecessarily high level of specificity to your rule declarations, and they are not reusable.

You should never define an ID selector in a CSS Module.

Syntax

• Use the .scss syntax, never the original .sass syntax
• Order your regular CSS and @include declarations logically (see below)

Ordering of property declarations

1. @include or composes declarations

2. Property declarations in alphabetical order

   .btnGreen {
     @include transition(background 0.5s ease);
     background: green;
     color: red;
     font-weight: bold;
     // ...
   }
   

3. Nested pseudo-selectors

   Nested pseudo-selectors go last, and nothing goes after them.

   .btn {
     @include color(red);
     font-weight: bold;
   
     &:hover {
       cursor: pointer;
     }
   
   }
   

Variables

Prefer camelCased variable names (e.g. $myVariable).

Mixins

• 1 space after the mixin name before the opening parens
• 1 space after colons and between params
• Commas are used as separators unless passing in a comma separated list as an argument, in these cases use a semicolon Default values can be used when it's convenient

Changelog

Master

1.0.0-alpha.1 - 10/20/17

• Upgrades StyleLint dependencies and adds a few new rules.

0.3.2 - 04/10/17

Removes at-rule-no-unknown so all sass syntax is supported.

0.3.1 - 03/28/17

This release ensures using CSS modules selectors such as :global and :local don't trigger invalid stylelint errors. Useful when using libraries such as react-addons-css-transition-group.

0.3.0 - 03/23/17

This release upgrades Stylelint from 7.5.0 to 7.9.0 and stylelint-config-standard from 14.0.0 to 16.0.0.

BREAKING CHANGES

FEATURES

FIXES

0.2.0 - 02/07/17

BREAKING CHANGES

dependencies were converted to peerDependencies and kyt now includes the dependencies. If you're using kyt, then an npm install should be enough. If you installed this package as a standalone extension then you'll need to follow the Installation instructions and npm install the named dependencies.

FEATURES

FIXES

**0.0.1 - 0.1.0 ** - 12/08/16 - life

Changelog

1.0.0-alpha.3 10/23/17

• Upgrades ESLint prettier and babel-eslint and makes it a peerDependency in eslint-config-kyt. 543
• Fixes at-rule for Sass support in eslint-config-stylelint. 543