TanStack Start

Full-stack React framework built on TanStack Router + Vite. Client-first with opt-in server capabilities. Type-safe from routes to server functions.

When to Use

Triggers: tanstack start, tanstack router, server function, createServerFn, createFileRoute, gremlin-cms, tanstack app, or any work in a TanStack Start project.

Core Concepts

Execution Model — Critical

Route loaders are ISOMORPHIC — they run on BOTH server and client. This is the #1 gotcha.