sindresorhus/eslint-plugin-unicorn
Eslint Plugin Unicorn
eslint-plugin-unicorn is an ESLint plugin that provides a large set of opinionated lint rules for JavaScript and TypeScript projects. Its primary purpose is to enforce code quality, prevent common errors and anti-patterns, and promote a consistent coding style across a codebase.
The plugin distinguishes itself by offering an opinionated preset configuration that imposes a specific coding style rather than leaving all choices to the user. Its rules are specifically designed to catch logical mistakes and code smells that go beyond standard ESLint rules. As an added capability, the plugin also extends linting to non-JavaScript files such as CSS, HTML, JSON, and Markdown within the same ESLint workflow.
Each rule is individually configurable, and the plugin provides an auto-fix engine for safe, reversible edits. The plugin supports both ESM and CommonJS module formats for compatibility with varying ESLint environments.
Features
- Code Quality Linting - Enforces coding standards and best practices across JavaScript and TypeScript projects.
- AST Pattern Matching - Provides AST-based pattern matching for detecting code violations and applying automated fixes.
- ESLint Import Plugins - Registers rules as an ESLint plugin via the standard plugin interface for loading and cascading.
- Code Quality Rule Collections - Provides a collection of ESLint rules that detect code smells and enforce best practices.
- JavaScript Linters - Helps catch common programming errors and logical mistakes in JavaScript code.
- JavaScript Error Detectors - Catches common programming errors and logical mistakes in JavaScript code automatically.
- JavaScript Style Linting - Enforces consistent coding style across JavaScript codebases with opinionated lint rules.
- JavaScript-Focused Linting - All rules target JavaScript and related syntaxes using ESLint's built-in parser.
- Opinionated Lint Presets - Provides an opinionated preset of ESLint rules that impose a specific coding style.
- Per-Rule Configurations - Each rule in the plugin exposes configurable options to adapt behavior per project.
- Multi-File-Type Linting - Extends linting to CSS, HTML, JSON, and Markdown files within the same ESLint workflow.
- Non-JavaScript File Linting - Extends ESLint to lint CSS, HTML, JSON, and Markdown files within the same workflow.
- Auto-Fix Engines - Provides an auto-fix engine that applies safe, reversible edits to source code automatically.
- Lint Rule Collections - Ships a composable collection of lint rules that can be combined and configured together.
- Code Quality Plugins - Provides a wide variety of modern, useful linting rules.
- Developer Tooling - Collection of useful ESLint rules.
