A linter for CSS and CSS-like languages that is:
- complete - coverage of all standard CSS syntax
- extensible - multiple points of extension
- configurable - no defaults and options to tailor the linter
- robust - comprehensive test coverage and a wide range of fixtures
- consistent - conventions for behavior, naming and documentation
- performant - tools to test and improve performance
Provide built-in rules for standard CSS syntax that:
Provide rules to catch code that is valid but likely has unintended consequences, e.g. duplicates and overrides.
Provide rules to limit what language features can be used to enforce:
- a maximum specificity by limiting the overall specificity or the occurrence of different selector types, e.g. class, ID and attribute
- best practice at the configuration level, e.g. disallowing the
allkeyword for transitions - the use of a subset of features to improve consistency across a codebase, e.g. limiting what units are allowed
- specific patterns for selectors and names, e.g. those of custom properties
Provide rules to enforce a diverse range of stylistic conventions, including:
- whitespace
- case
- quotes
Provide multiple points of extensions, including:
- plugins - build community rules to support methodologies, toolsets, non-standard CSS features, or very specific use cases
- extendable configs - extend and share configurations
- formatters - format Stylelint result objects
- custom syntax - use any PostCSS-compatible syntax module
Provide a robust tool with a comprehensive test suite, including:
- high coverage, currently over 95%
- a wide range of fixtures for rules
Provide consistency throughout, including consistent rules.
Provide a fast tool and the means to test and improve performance, including benchmarking of an individual rule's performance.