Remix removes injected html from external script about remix HOT 1 CLOSED

This is not a Remix issue but an invalid DOM modification when using React SSR + Hydration: https://react.dev/reference/react-dom/client/hydrateRoot#caveats

hydrateRoot() expects the rendered content to be identical with the server-rendered content. You should treat mismatches as bugs and fix them

Hydration expects the initial client side render to match the server side render exactly - and mutating the DOM like this during page load will always cause issues. Sometimes this is unavoidable due to browser extensions and other scenarios and React is working on fixing those scenarios. But your best bet is to avoid manually mutating the DOM outside of React - and especially before hydration.

Here's a few related issues/discussions in the Remix repo which may have some useful information for handling these scenarios: #5244, #4902

And a blog post from one of our community members: https://www.jacobparis.com/content/remix-hydration-errors

from remix.