The ProdFix Blog

The wrong regex pattern can hang your Node.js server. Here's how to detect and prevent it.

Data fetching in the Next.js App Router has changed. Here's what works in production and what doesn't.

Polyfills for modern browser APIs can introduce subtle bugs. Here's what to watch for in production.

Enabling strictNullChecks on an existing codebase reveals hundreds of potential production bugs. Here's how to do it.

BigInt solves integer precision but introduces serialization and compatibility issues. Here's what to watch for.

Context and Zustand have different performance profiles at scale. Here's the production comparison.

Dynamic imports enable code splitting but can fail in specific ways. Here's the production-safe pattern.

Exhaustive type checking on switch statements prevents entire categories of runtime errors.

IntersectionObserver leaks if not cleaned up. Here's the production-safe pattern for lazy loading.

Stream errors in Node.js can silently lose data. Here's the error handling pattern that prevents it.

Deep cloning objects incorrectly causes subtle bugs. Here's when to use structuredClone vs JSON approaches.

Incorrect key props cause rendering bugs that are invisible in development. Here's how they manifest.

JavaScript Proxy enables powerful patterns but has performance and debugging implications. Here's what to know.

Mapped types provide compile-time safety but don't help at runtime. Here's the runtime validation to add.

BroadcastChannel enables cross-tab features. Here's how to implement it without cross-tab bugs.

Animations degrade performance if implemented incorrectly. Here's the production-safe animation patterns.

Symbols prevent accidental key collisions in complex objects. Here's when to use them in production code.

Cookie and header handling differs between Node.js and Edge runtimes. Here's what breaks and why.

SharedArrayBuffer enables true parallelism but has security implications. Here's the production guide.

Error boundaries isolate failures. Here's the patterns for granular recovery without losing user state.

Uncancelled requests cause race conditions and memory leaks. Here's how to use AbortController correctly.

The satisfies operator provides type checking without widening types. Here's where it prevents production bugs.

Tax compliance for indie hackers requires the right technical setup. Here's what data to collect and how.

Chrome extensions have unique error monitoring challenges. Here's how to capture errors from extensions.