HMR not working when default export is an anonymous function

[tavoyne]

What version of Remix are you using?

1.19.3

Are all your remix dependencies & dev-dependencies using the same version?

• Yes

Steps to Reproduce

Create a new Remix app using npx create-remix@latest, replace the default-exported named function in the index route with anonymous function, start the dev server, and try changing the markup.

Expected Behavior

Changes to the markup to be picked up.

(If this is expected, maybe it should be mentioned in the docs. Can do a PR in this case.)

Actual Behavior

App is rebuilt but changes are not picked up by the browser.

[pcattori]

Duplicate of #6935 . This is a limitation of React Refresh, not Remix.