The Playground lets you write TypeScript or JavaScript online in a safe and sharable way.

How building edge-case first led to bloated, overly-granular libraries and what we can do about it

On July 24, 2025, we successfully performed a full production failover of our core control-plane database from Azure West US to East US 2 with zero customer impact.

Vercel’s Open SDK strategy commits to building frameworks, SDKs, and tools in the open, under permissive licenses. Learn how we’re avoiding lock-in, ensuring portability, and investing in open source to build a better web for everyone.

Vercel’s Open SDK strategy commits to building frameworks, SDKs, and tools in the open, under permissive licenses. Learn how we’re avoiding lock-in, ensuring portability, and investing in open source ...

Next.js 15.5 includes Turbopack builds in beta, stable Node.js middleware, TypeScript improvements, `next lint` deprecation, and deprecation warnings for Next.js 16.

Join vlt as a Senior Backend Engineer and help build the future of JavaScript packages

Modern JavaScript bundlers commonly implement two optimizations: scope hoisting, and code splitting. In this post, I'll discuss how these are fundamentally at odds with each other.

Join the team.