# csslint/csslint

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4,805 stars · 475 forks · JavaScript · NOASSERTION

## Links

- GitHub: https://github.com/CSSLint/csslint
- Homepage: http://csslint.net
- awesome-repositories: https://awesome-repositories.com/repository/csslint-csslint.md

## Description

This project is a CSS linter and static analysis tool designed to identify syntax errors, logic flaws, and problematic patterns in Cascading Stylesheets. It functions as a command line validator that verifies code quality and enforces consistent styling and coding standards without requiring a web browser.

The analyzer distinguishes itself by incorporating web accessibility auditing to detect patterns that hinder users with disabilities. It also performs browser compatibility checking to identify non-standard hacks and missing vendor prefixes, and provides performance optimization analysis to improve rendering speeds.

The tool covers a broad range of capabilities, including the enforcement of maintainability standards, the identification of logic errors like duplicate properties, and the validation of general CSS syntax. It supports custom linting rule creation and provides a configurable rule pipeline where warnings can be suppressed on a per-line basis.

Integration is supported via a command line interface, Git hooks, and continuous integration build pipelines, with the ability to export results as XML reports for monitoring.

## Tags

### Software Engineering & Architecture

- [Static Analysis Engines](https://awesome-repositories.com/f/software-engineering-architecture/static-analysis-engines.md) — Provides a static analysis engine that scans CSS files for syntax errors, logic flaws, and problematic patterns without execution.
- [Abstract Syntax Tree Parsing](https://awesome-repositories.com/f/software-engineering-architecture/abstract-syntax-tree-parsing.md) — Implements a parser that converts CSS text into a structured tree for precise syntax and logic analysis.
- [CSS Style Enforcement](https://awesome-repositories.com/f/software-engineering-architecture/coding-convention-specifications/css-style-enforcement.md) — Enforces consistent coding standards and maintainability rules across CSS codebases for multiple developers.
- [Validation Rule Engines](https://awesome-repositories.com/f/software-engineering-architecture/contextual-validation-rules/dynamic-validation-rules/validation-rule-engines.md) — Evaluates parsed CSS against a set of independent logic checks to identify style and accessibility violations.
- [Syntax Tree Analysis](https://awesome-repositories.com/f/software-engineering-architecture/syntax-tree-analysis.md) — Uses abstract syntax tree parsing to identify syntax errors and problematic patterns in CSS. ([source](https://cdn.jsdelivr.net/gh/csslint/csslint@master/README.md))
- [Linting Rule Configurations](https://awesome-repositories.com/f/software-engineering-architecture/project-management-governance/project-governance/standards-rule-enforcement/configuration-driven-rules/linting-rule-configurations.md) — Offers a system to toggle specific linting checks and set severity levels via external configuration files or CLI arguments.
- [Warning Suppressions](https://awesome-repositories.com/f/software-engineering-architecture/warning-issuance-systems/warning-suppressions.md) — Allows developers to ignore specific linting rules on a per-line basis to handle exceptions. ([source](https://github.com/CSSLint/csslint/wiki))

### Testing & Quality Assurance

- [CSS Linters](https://awesome-repositories.com/f/testing-quality-assurance/css-linters.md) — Functions as a static analysis tool that identifies errors and enforces coding conventions specifically for CSS.
- [CSS Syntax Error Detection](https://awesome-repositories.com/f/testing-quality-assurance/css-syntax-error-detection.md) — Identifies mistyped characters and invalid CSS code to prevent browser parsing errors and rendering inconsistencies.
- [Static Logic Error Detection](https://awesome-repositories.com/f/testing-quality-assurance/static-logic-error-detection.md) — Identifies potential logic flaws such as duplicate properties and empty rules via static analysis. ([source](https://github.com/CSSLint/csslint/wiki/Rules))
- [Accessibility Auditing](https://awesome-repositories.com/f/testing-quality-assurance/accessibility-visual-testing/web-accessibility-standards/semantic-document-structures/accessibility-auditing.md) — Scans CSS for patterns that hinder users with disabilities, such as missing focus outlines and poor color contrast.
- [CSS Selector Performance Analysis](https://awesome-repositories.com/f/testing-quality-assurance/general-testing-utilities/test-utilities-assertions/browser-ui-interaction/ui-element-selectors/dom-element-selectors/selector-performance-optimization/css-selector-performance-analysis.md) — Analyzes selectors and properties to identify opportunities for reducing file sizes and improving rendering speeds. ([source](https://github.com/CSSLint/csslint/wiki/Rules))

### Development Tools & Productivity

- [CLI Accessibility Auditors](https://awesome-repositories.com/f/development-tools-productivity/cli-accessibility-auditors.md) — Provides a command-line tool for analyzing CSS source files for accessibility compliance without requiring a browser.
- [Command Line Analysis Tools](https://awesome-repositories.com/f/development-tools-productivity/command-line-analysis-tools.md) — Provides a terminal-based interface for scanning CSS files and directories to identify syntax errors and problematic patterns. ([source](https://github.com/CSSLint/csslint/wiki/Command-line-interface))
- [CSS Syntax Validators](https://awesome-repositories.com/f/development-tools-productivity/css-syntax-validators.md) — Provides a command-line interface for verifying CSS syntax and quality without requiring a web browser.
- [Static Analysis Tools](https://awesome-repositories.com/f/development-tools-productivity/static-analysis-tools.md) — Implements a static analysis engine to validate CSS code structure and identify problematic patterns.
- [Custom Lint Rule Definitions](https://awesome-repositories.com/f/development-tools-productivity/code-quality-analysis/static-analysis-engines/static-analysis-tools/static-analysis-rules/framework-linting-rules/core-rule-extensions/custom-lint-rule-plugins/custom-lint-rule-definitions.md) — Supports the definition of custom linting patterns and validation logic to enforce project-specific coding standards.
- [Browser Compatibility Verification](https://awesome-repositories.com/f/development-tools-productivity/debugging-profiling-testing/browser-compatibility-verification.md) — Detects non-standard CSS hacks and missing vendor prefixes to ensure consistent rendering across different web browsers.
- [Git Hooks](https://awesome-repositories.com/f/development-tools-productivity/git-hooks.md) — Includes support for executing linting checks during Git pre-commit hooks to prevent problematic code from being merged. ([source](https://github.com/CSSLint/csslint/wiki/Build-System-Integration))
- [Build Pipeline Integrations](https://awesome-repositories.com/f/development-tools-productivity/workflow-automation-tools/build-task-automation/build-pipeline-integrations.md) — Enables the embedding of CSS static analysis as an automated quality gate within CI/CD build pipelines. ([source](https://github.com/CSSLint/csslint/wiki/Build-System-Integration))

### DevOps & Infrastructure

- [CI/CD Pipeline Integrations](https://awesome-repositories.com/f/devops-infrastructure/ci-cd-pipeline-integrations.md) — Integrates CSS static analysis into continuous integration and deployment workflows to catch errors before production.

### User Interface & Experience

- [Accessibility Auditing Tools](https://awesome-repositories.com/f/user-interface-experience/accessibility-auditing-tools.md) — Provides automated scanning of CSS to detect patterns that hinder users with disabilities and violate accessibility standards. ([source](https://github.com/CSSLint/csslint/wiki/Rules))
- [Stylesheet Maintainability Standards](https://awesome-repositories.com/f/user-interface-experience/stylesheet-maintainability-standards.md) — Enforces standards for property ordering and declaration limits to ensure long-term stylesheet maintainability. ([source](https://github.com/CSSLint/csslint/wiki/Rules))

### Web Development

- [CSS Vendor Prefix & Hack Detection](https://awesome-repositories.com/f/web-development/data-fetching-caching/data-fetching/browser-compatibility/css-vendor-prefix-hack-detection.md) — Detects non-standard hacks and missing vendor prefixes to ensure consistent cross-browser rendering. ([source](https://github.com/CSSLint/csslint/wiki/Rules))