How to Test Node.js Applications with the Built-In Test Runner
Write isolated unit and HTTP tests with node:test, strict assertions, mocks, coverage reporting, deterministic cleanup, and a CI-friendly exit status.
Structured Logging in Node.js with Pino and Request IDs
Emit machine-readable JSON logs with severity, request correlation, durations, safe error serialization, and automatic redaction of credentials.
How to Secure an Express API with Helmet, CORS, and Rate Limiting
Apply secure HTTP headers, an explicit CORS allowlist, proxy-aware rate limiting, small request limits, and production-safe Express settings.
How to Audit Node.js Dependencies with npm audit
Inspect the dependency graph, run reproducible vulnerability audits, separate runtime from development exposure, apply compatible fixes, and review breaking upgrades manually.
Node.js Error Handling, Graceful Shutdown, and Health Checks
Separate operational errors from programmer defects, expose liveness and readiness correctly, stop accepting traffic on termination, and bound graceful shutdown.
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