DeepScan JavaScript Analyzer

DeepScan is a static analysis tool for JavaScript and TypeScript code that finds runtime errors and quality issues that linters like ESLint cannot detect. Developed by NAVYbits (based in Seoul, South Korea) and launched in 2017, DeepScan performs deeper semantic analysis to catch bugs before production. Key features: interprocedural data flow analysis tracking variable values through control flow paths, detecting issues like null dereference, undefined property access, and type coercion bugs that linters miss. Analyzes ES6, ES2020, TypeScript, React JSX, Vue, and Node.js code with framework-aware rules. Over 300 rules categorized into bug detection, code quality, and maintainability checks with detailed explanations. Advanced semantic analysis including type inference and control flow analysis to minimize false positives targeting zero-noise analysis. Code metrics including cyclomatic complexity, function size, and parameter count for identifying complex code. DeepScan GitHub App for automated analysis of pull requests with inline comments and quality badges. DeepScan CLI for running analysis in CI pipelines including Jenkins, GitHub Actions, GitLab CI, and Bitbucket Pipelines. Configurable rule selection per project with severity levels. Web-based dashboard showing code quality trends, issue tracking, and project health metrics with historical comparisons. React-specific rules for detecting common anti-patterns including missing keys and incorrect hook dependencies. Leverages TypeScript type information for accurate analysis. Used by Samsung, LG, and Naver for JavaScript quality assurance.