stylelint/stylelint

Features

• Stylesheet Analysis CLIs - Provides a command-line tool for scanning stylesheets to identify errors and enforce coding conventions.
• Code Quality Tools - Identifies syntax errors and enforces consistent coding conventions across stylesheets to prevent bugs.
• Static Code Analysis Tools - Implements a system that scans stylesheets for syntax errors and problematic patterns without executing the code.
• Linting Error Corrections - Automatically corrects repairable coding problems to maintain consistency across stylesheets.
• Command Line Interfaces - Provides a ready-to-run command-line application for executing style analysis and managing configuration.
• CSS AST Analysis - Analyzes CSS stylesheets using abstract syntax trees generated via PostCSS to evaluate code structure.
• CSS and Preprocessor Formatting - Automatically corrects repairable styling violations and convention errors to maintain a clean codebase.
• Custom Style Syntaxes - Supports non-standard style languages and preprocessors through a modular custom parsing architecture.
• Syntax Validation - Verifies the grammatical correctness of stylesheets through AST analysis to detect malformed code or custom syntax.
• CSS Style Enforcement - Enforces consistency and syntax standards specifically for CSS and style-like languages.
• Plugin-Based Rule Engines - Implements a modular architecture where individual linting rules are encapsulated as decoupled plugin modules.
• Automatic Lint Fixes - Automatically corrects formatting and style violations detected during linting without requiring manual intervention.
• Extensible Plugin Architectures - Implements a modular architecture for creating custom rules, syntaxes, and formatters via plugins.
• CSS Preprocessor Parsing - Parses CSS preprocessor syntaxes such as SCSS and Less into structured trees for analysis.
• Automated Code Fixers - Provides a utility that automatically corrects repairable styling violations to ensure consistency.
• CSS Linters - Provides a validator that supports non-standard syntaxes like SCSS and Less for style linting.
• CSS Linting - Analyzes non-standard syntaxes like SCSS and Less to apply validation rules to pre-processed styles.
• CSS Syntax Error Detection - Identifies malformed CSS values, such as invalid hex codes or media queries, that cause browser parsing errors.
• Style Extraction - Locates and extracts style definitions embedded within non-CSS files like HTML, Markdown, or template literals for analysis.
• PostCSS Pipeline Integration - Integrates stylesheet analysis as a plugin within a PostCSS processing pipeline to validate CSS during builds.
• Shareable Configurations - Supports the creation and inheritance of reusable rule sets to maintain consistency across projects.
• Analysis Result Caches - Stores intermediate analysis results for unchanged files to avoid redundant processing and improve performance.
• Automated Code Fix Suggestions - Provides actionable code change suggestions by identifying character ranges and replacement text to resolve styling violations.
• Editor Integrations - Connects linting feedback and error highlighting directly into the editor workflow via extensions.
• Custom Lint Rule Plugins - Provides a plugin interface for adding custom lint rules and embedded style support.
• Custom Lint Rule Definitions - Provides interfaces for defining custom rules to enforce team-specific CSS and style standards.
• Style Syntax Definitions - Allows modification of the parser to recognize specialized CSS at-rules, keywords, and units.
• Lint Result Formatters - Transforms lint results into multiple output formats like JSON, XML, or TAP for integration with build systems.
• Configuration Cascade Resolutions - Implements logic to determine the final active rule set by merging hierarchical configuration layers.
• CSS Syntax Deprecation - Identifies and blocks outdated CSS properties and selectors to ensure compatibility with modern standards.
• Duplicate Declaration Preventions - Identifies and prevents redundant property or selector declarations within stylesheets to reduce code bloat.
• Language-Specific Formatting Overrides - Allows specification of different syntaxes and rule sets for specific file patterns to support multiple languages.
• Property and Element Restrictions - Enforces constraints on which CSS properties, functions, or pseudo-classes are permitted using allow-lists and deny-lists.
• Property Value Constraints - Enforces limits on the number of values assigned to a specific CSS property using regular expressions.
• CSS Redundancy Removal - Identifies and blocks unnecessary longhand properties or redundant nested rules in stylesheets.
• Recursive Configuration Merging - Deeply merges global configurations with file-specific overrides to create a final resolved settings tree.
• Unknown Identifier Detection - Flags unrecognized CSS properties, functions, and pseudo-elements to prevent typos and non-standard usage.
• Rule Suppression Comments - Uses inline source code comments to disable specific linting rules for targeted lines or blocks.
• Warning Threshold Enforcers - Fails the build process when the number of emitted warnings exceeds a specified limit in CI.
• Lint Rule Severity Levels - Allows definition of rule activity and severity levels (error, warning, or off) via configuration.
• Lint Result Formatters - Transforms lint analysis results into multiple output formats for integration with editors, CI systems, and build pipelines.
• Selector Complexity Limits - Constrains the number of IDs, classes, or attributes in a CSS selector to optimize browser performance.
• CSS Property Value Validations - Flags property-value pairs that do not exist in specifications to ensure valid stylesheet syntax.
• Selector Specificity Restrictions - Ensures selectors adhere to maximum specificity thresholds to maintain a manageable CSS architecture.
• CSS-in-JS Extraction - Locates and extracts CSS styles embedded within JavaScript template literals or HTML for linting.
• Vendor Prefix Restrictions - Disallows the use of vendor-prefixed properties and selectors to encourage adherence to standard CSS specifications.
• Code Quality Tools - Modern CSS and style sheet linting tool.
• Web Frameworks - Linter for enforcing style conventions.

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