What is stylelint-config-standard?
The stylelint-config-standard package is an extensible shared configuration for Stylelint, which is a mighty, modern linter that helps you avoid errors and enforce conventions in your styles. It is considered the standard configuration for Stylelint, providing a sensible default configuration that enforces common stylistic conventions for CSS.
What are stylelint-config-standard's main functionalities?
Extensible Configuration
This package provides a base set of rules for Stylelint, which can be extended in a project's .stylelintrc configuration file. By extending stylelint-config-standard, you inherit a standard set of rules that can be customized further.
{
"extends": "stylelint-config-standard"
}
Enforce Stylistic Conventions
The package enforces stylistic conventions such as lowercase hex colors, indentation levels, and leading zeros in numbers. These rules help maintain consistency across your project's stylesheets.
{
"rules": {
"color-hex-case": "lower",
"indentation": 2,
"number-leading-zero": "always"
}
}
Customizable Rules
While it provides a standard set of rules, it also allows for customization. Developers can override or extend the rules to fit their project's specific needs, such as allowing certain at-rules that are not part of CSS specifications but are used by preprocessors.
{
"extends": "stylelint-config-standard",
"rules": {
"at-rule-no-unknown": [ true, {
"ignoreAtRules": ["extends", "ignores"]
}]
}
}
Other packages similar to stylelint-config-standard
stylelint-config-recommended
This package is a lighter version of the standard configuration, focusing on possible error rules rather than stylistic rules. It's a good starting point for projects that want to enforce error checking without imposing stylistic choices.
stylelint-config-sass-guidelines
This package extends stylelint-config-standard and adds rules specific to Sass, such as those for nesting depth, name formats, and other conventions. It's tailored for projects that use Sass and want to adhere to common guidelines.
stylelint-prettier
This package integrates Stylelint with Prettier, an opinionated code formatter. It disables all rules that might conflict with Prettier, allowing developers to use Stylelint for linting and Prettier for formatting.
stylelint-config-standard
The standard shareable config for stylelint.
Extends stylelint-config-recommended
.
Turns on additional rules to enforce the common stylistic conventions found within a handful of CSS styleguides, including: The Idiomatic CSS Principles,
Google's CSS Style Guide, Airbnb's Styleguide, and @mdo's Code Guide.
It favours flexibility over strictness for things like multi-line lists and single-line rulesets, and tries to avoid potentially divisive rules.
Use it as is or as a foundation for your own config.
To see the rules that this config uses, please read the config itself.
Example
@import url(x.css);
@import url(y.css);
.selector-1,
.selector-2,
.selector-3[type="text"] {
background: linear-gradient(#fff, rgba(0, 0, 0, 0.8));
box-sizing: border-box;
display: block;
color: #333;
}
.selector-a,
.selector-b:not(:first-child) {
padding: 10px !important;
top: calc(calc(1em * 2) / 3);
}
.selector-x { width: 10%; }
.selector-y { width: 20%; }
.selector-z { width: 30%; }
@media (min-width >= 60em) {
.selector {
transform: translate(1, 1) scale(3);
}
}
@media (orientation: portrait), projection and (color) {
.selector-i + .selector-ii {
background: color(rgb(0, 0, 0) lightness(50%));
font-family: helvetica, "arial black", sans-serif;
}
}
@media
screen and (min-resolution: 192dpi),
screen and (min-resolution: 2dppx) {
.selector {
background-image:
repeating-linear-gradient(
-45deg,
transparent,
#fff 25px,
rgba(255, 255, 255, 1) 50px
);
margin: 10px;
margin-bottom: 5px;
box-shadow:
0 1px 1px #000,
0 1px 0 #fff,
2px 2px 1px 1px #ccc inset;
height: 10rem;
}
.selector::after {
content: '→';
background-image: url(x.svg);
}
}
Note: the config is tested against this example, as such the example contains plenty of CSS syntax, formatting and features.
Installation
npm install stylelint-config-standard --save-dev
Usage
If you've installed stylelint-config-standard
locally within your project, just set your stylelint
config to:
{
"extends": "stylelint-config-standard"
}
If you've globally installed stylelint-config-standard
using the -g
flag, then you'll need to use the absolute path to stylelint-config-standard
in your config e.g.
{
"extends": "/absolute/path/to/stylelint-config-standard"
}
Since stylelint 9.7.0, you can simply use the globally installed configuration name instead of the absolute path:
{
"extends": "stylelint-config-standard"
}
Extending the config
Simply add a "rules"
key to your config, then add your overrides and additions there.
For example, to change the at-rule-no-unknown
rule to use its ignoreAtRules
option, change the indentation
to tabs, turn off the number-leading-zero
rule,and add the unit-allowed-list
rule:
{
"extends": "stylelint-config-standard",
"rules": {
"at-rule-no-unknown": [
true,
{
"ignoreAtRules": ["extends", "ignores"]
}
],
"indentation": "tab",
"number-leading-zero": null,
"unit-allowed-list": ["em", "rem", "s"]
}
}
Suggested additions
stylelint-config-standard
is a great foundation for your own config. You can extend it to create a tailored and much stricter config:
- Specify what quotes must be used using:
- If you use
autoprefixer
you'll want to disallow vendor prefixes using:
- Control specificity using:
- Specify acceptable selector types, units, properties, functions and words in comments using:
- Specify acceptable naming patterns using:
- Specify a notation when there are one or more valid representations using:
- Specify what types of URLs are allowed using:
- Specify a maximum line length using:
The config is broadly compatible with SugarSS syntax. You will need to turn off the rules that check braces and semicolons, as so:
{
"extends": "stylelint-config-standard",
"rules": {
"block-closing-brace-empty-line-before": null,
"block-closing-brace-newline-after": null,
"block-closing-brace-newline-before": null,
"block-closing-brace-space-before": null,
"block-opening-brace-newline-after": null,
"block-opening-brace-space-after": null,
"block-opening-brace-space-before": null,
"declaration-block-semicolon-newline-after": null,
"declaration-block-semicolon-space-after": null,
"declaration-block-semicolon-space-before": null,
"declaration-block-trailing-semicolon": null
}
}