DeepSource for JavaScript/TypeScript Projects

DeepSource gives JavaScript and TypeScript projects a static analysis platform that goes well beyond what ESLint covers on its own. Its JavaScript analyzer detects over 100 issues across bug risks, security vulnerabilities, anti-patterns, and performance problems - with Autofix generating ready-to-apply code changes for many of those findings. For teams already running ESLint locally, DeepSource adds a CI/CD layer with a dashboard, PR comments, and automated remediation that turns code review into something closer to an automated workflow. This guide covers everything needed to set up DeepSource for JavaScript and TypeScript projects - from the initial .deepsource.toml configuration to React, Next.js, and Node.js-specific rules, security issue detection, ESLint overlap, and test coverage integration with Jest and Vitest. For a broader overview of the platform, see our DeepSource review. Why JavaScript teams use DeepSource JavaScript's flexibility is both its greatest strength and its m