A static code analyzer for JavaScript, TypeScript, and CSS that detects quality and security issues.
SonarJS is a static code analyzer that detects bugs, vulnerabilities, and code smells in JavaScript, TypeScript, and CSS code. It helps developers improve code quality and security by identifying issues through pattern matching and control flow analysis. The tool integrates with SonarQube and SonarCloud for continuous monitoring and reporting.
JavaScript and TypeScript developers, teams using SonarQube or SonarCloud for code quality management, and projects requiring automated security and quality analysis for frontend and CSS code.
Developers choose SonarJS for its deep, comprehensive rule sets, support for modern JavaScript features and frameworks, and seamless integration with the Sonar ecosystem for centralized code quality management.
SonarSource Static Analyzer for JavaScript and TypeScript
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With 479 JavaScript rules and 496 TypeScript rules, SonarJS offers thorough coverage for detecting bugs and vulnerabilities, as detailed in the official rule lists linked in the README.
Supports React JSX, Vue, AWS Lambda, and CSS preprocessors like SCSS and Less, making it adaptable to contemporary web development workflows.
Seamlessly works with SonarQube and SonarCloud for centralized code quality monitoring and security analysis, enabling continuous integration in CI/CD pipelines.
Can import issues from ESLint, TSLint, and Stylelint, allowing teams to unify linting results and avoid duplicate tooling, as noted in the features section.
Full functionality is tightly coupled with SonarQube or SonarCloud, requiring additional infrastructure and setup, which may not suit teams seeking lightweight, standalone analysis.
Building from source demands JDK 17, Node.js >= 22, npm >= 8, and Maven >= 3.8, as per prerequisites, creating a high barrier for community contributions.
Parts of the project are under the Sonar Source-Available License (SSALv1), which may restrict use in certain open-source projects and introduce vendor lock-in concerns.