React Router v7 Framework Mode Enables StrictMode by Default With No Documented Opt-Out

StrictMode can be disabled via a single boolean flag in the react-router.config.ts file, as documented in the official React Router v7 migration guide.

Framework mode does not actually enable StrictMode by default; this is a common misconception stemming from Vite's own StrictMode defaults.

There is no documented configuration flag to disable StrictMode in framework mode; the closest workaround is dropping down to using React Router purely as a library, which forfeits other framework-mode features.

StrictMode can only be disabled by wrapping the root App component in a custom component named NoStrictMode, which React Router detects and honors automatically.