## What?
Removes `experimental.appDir` this was leftover from when I flipped the
switch.
Kept the config file as in the future we might add future flags and
such. It also helps that it has the types comment included so you always
get types.
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---------
Co-authored-by: JJ Kasper <jj@jjsweb.site>
We've supported `export const config = { ... }` to sepecify `runtime`
etc. configs for pages under `app/` for a while. This PR is going to
drop it and only support `export const [config name] = [config value]`
per config
Add a warning if the legacy usage is detectd
Closes NEXT-1016
Reverts vercel/next.js#43597
The tests were disabled and currently the checking of these components
are not reliable, it also breaks the hmr. Revert it for now and then
we'll revisit how to re-enable the required tags checking
### Update
We removed the `<head>` element checking for root layout in #41621. Since we also need `<head>` for preload in the future, and also css-in-js will require that. We're adding back the `head` element checking to make sure user always provide valid root layout including it.
### Issue
An issue was reported [here](https://github.com/mui/material-ui/issues/34905#issuecomment-1331945868) that the Emotion/MUI site was suffering from FOUC.
After an inspection, I noticed that the SSRed HTML didn't contain the inserted styles at all - despite them being inserted through `useServerInsertedHTML`. I managed to debug it down and discovered that their layout was missing `<head></head>` and thus the stream transformer skipped the insertion altogether cause of this check:
fbc98abab3/packages/next/server/node-web-streams-helper.ts (L177-L183)
I've figured that at the very least we could surface this as a console error in development to nudge the user to fix the missing `<head/>`
cc @huozhi
Co-authored-by: Jiachi Liu <4800338+huozhi@users.noreply.github.com>
* Import dev overlay for dev mode only
* Remove other unused code
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## Bug
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Remove head as required in root layout.
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Moves the logic that checks if there's a new root layout to the client.
Adds test for static and dynamic catchall.
Related: #41457
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Co-authored-by: Tim Neutkens <tim@timneutkens.nl>
Co-authored-by: JJ Kasper <jj@jjsweb.site>
This PR updates app configurations from `export const config = { ... }`
to be directly exported.
## Bug
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Co-authored-by: JJ Kasper <jj@jjsweb.site>
Moves where the validation is made to make sure the error reaches the
client. Tests that an error overlay is shown on the client.
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Co-authored-by: JJ Kasper <jj@jjsweb.site>
Inspects the stream of rendered HTML in dev to make sure all required tags are rendered. Since navigating to a new root layout causes a full page navigation we don't have to worry about flight requests.
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