* Updated event

* adjust regex

* adjust regexp more

* Better test file regex

* add tests

* Update index.test.js

* Rename test file
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Fix #8655, skip rendering meta tags with undefined props

* Filter all tags, not just meta

* Only render defined props

* Remove filtering of undefined strings
Co-Authored-By: NTim Neutkens <tim@timneutkens.nl>

* Replace Object.entries

* Remove filtering code

* Simplify code

* Add test

* Add tests for undefined head prop value and tweak check

* Update to strip undefined prop values to match react

* Update head.js
Co-authored-by: NTim Neutkens <tim@timneutkens.nl>
Co-authored-by: NJoe Haddad <timer150@gmail.com>
Co-authored-by: NJJ Kasper <jj@jjsweb.site>

* New Jest Example

* add missing zeit logo

* Revert zeit.svg

* remove old jest examples

* Update jest.config.js

* Add TypeScript Definitions for Sass

* fix test

* Update to not show API not ended warning when response is piped to

* Update to use res.once
Co-authored-by: NJoe Haddad <timer150@gmail.com>

Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Updated links

* Added utm
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Fix bug in catch-all routes with SSG

* fix slash
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Changing variable name internally

* Add tests for custom AMP validator
Co-authored-by: NJJ Kasper <jj@jjsweb.site>

* Implement experimental pages/404.js for custom 404 page

* Make sure to show error for getInitialProps in pages/404 in dev mode also

* Update routes-manifest tests for new value

* Make sure page404 is boolean in routes-manifest

* Rename variables for consistency

* Make sure to only use 404 page for 404 error

* Add failing test case

* Add check that dynamic route is API route in handleApiRequest

* Add support for runtimeConfigs in serverless mode

* Update test

* Add failing case

* Make sure to only refresh query if still on initial page
Co-authored-by: NJoe Haddad <timer150@gmail.com>

1. Prevent possible race conditions of cache pruning, refetching and redirects

2. Note: the original code has the following defect.

SignOut action restarts the dev server effectively resetting the memory and erasing all the "registered users" data. You have to SignUp again after SignOut. I'm not sure how
to properly fix it a.t.m

* TypeScript documentation for _app.tsx

* Use relative URL

* Use relative URL

* Update docs/basic-features/typescript.md
Co-Authored-By: NLuis Alvarez D. <luis@zeit.co>

* Update docs/basic-features/typescript.md
Co-Authored-By: NLuis Alvarez D. <luis@zeit.co>
Co-authored-by: NLuis Alvarez D. <luis@zeit.co>

* Fix api-routes-apollo-server-and-client-auth Example

`client.resetStore()` must be called after SignIn, SignOut actions

Otherwise, even the current basic auth is not working 100% of the time...

For example, as caching occurs here:

```
const { data, loading } = useQuery(ViewerQuery)
```

it sometimes (race conditions!) prevents a user from signing in
the current code base.

Check https://github.com/apollographql/apollo-cache-persist/issues/34#issuecomment-371177206 comment for more info.

* Fix api-routes-apollo-server-and-client-auth Example (linting)

Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Update the default template for create-next-app

* Fix link

* Updated note about public and pages overlap

* Update static-file-serving.md

* Update static-file-serving.md
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Polyfill Promise in polyfills chunk

* Override promise polyfill to use built-in

* Update sizes

* Update polyfills

* Test

* Add dep

* Use iife

* Unscope

* Revert "Unscope"

This reverts commit ab26bcefd551c544d5b3c577b7ce91e5ecfb9bb9.

* trigger

* Remove unused code

* Set helpers to true

* Update yarn.lock

* Fix test

* Update polyfills size

* Add comment

* Add back comment

* Put polyfills optimization under experimental flag

* Fix filename

* bring back promise for backwards compat until experimental feature is landed

* fix resolve alias check

* correct loader

* fix logic branches

* adjust !!

* adjust cache key

* Conditionally branch polyfill

* fix promise polyfill branching

* Re-add runtime

* fix base object

* fix yarn lock

* Add cache key

* correctly set caller

* add basic test

* Increment h=>i

* increment to j just in case
Co-authored-by: NJoe Haddad <timer150@gmail.com>
Co-authored-by: NJJ Kasper <jj@jjsweb.site>

* Disable caching for react@next workflow as its not support

* Disable needs build

* Also add checkout step

* Remove running on pull_request from testing

* Repair advanced feature reference

The explanation of the custom document feature had been moved.

* Update README.md
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* fix: 9919 no exported config found

* fix: 9919 remove isolated test, add integration

* fix: 9919 add check for successfull compilation and fix warnin check

* Add test for development output

* fix: 9919 add error page and link to it in warning

* Update empty-configuration.md
Co-authored-by: NJJ Kasper <jj@jjsweb.site>
Co-authored-by: NTim Neutkens <tim@timneutkens.nl>