* Add Fast Refresh Support

* Add Basic Acceptance Test

* Increase delay

* fix version

* Ignore test files

* Update packages/next/build/webpack/loaders/next-babel-loader.js

* Copy tests

* Redo test style

* drop directory

* fix compile

* fix remove function

* Update helpers

* Enable "paths" support by default

* Enable NEXT_PUBLIC_ prefix exposing the variable globally

Part of #11106

* Disable PnP plugin in webpack 5
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Use full hashes for hot update names
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Disable autodll in webpack 5
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Disable HashedModuleIdsPlugin in webpack 5
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Use regexes for ignoreplugin as it only supports regexes in webpack 5
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* webpack 4 supports resourceRegExp and contextRegExp
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Remove webpack 4 specific properties from the webpack 5 config
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Add library option for webpack 5 support
Co-Authored-By: NZack Jackson <zackary.l.jackson@gmail.com>

* Fix TypeScript Errors
Co-authored-by: NZack Jackson <zackary.l.jackson@gmail.com>
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Upgrade `terser-webpack-plugin` for Webpack 5

* Upgrade again

* cacache cannot be bundled

* cacache cannot be bundled

* fix file

* remove cacache dep

* Update LICENSE

* Add initial process.env stubbing for new env support

* Fix server process.env being stubbed in production

* bump
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Clean up env tests a bit

* Fix NEXT_PUBLIC env values not being inlined
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Add basePath in link component and add/remove it consistently

* Update to not use regex for delBasePath

* Expose addBasePath as router method

* Revert "Expose addBasePath as router method"

This reverts commit 40fed596195c6affabf837e42d472452768e13a3.

* Expose basePath as router field

* Apply suggestion

* Expose basePath as router field

* remove un-used vars

* Update externals

* Apply lint fix

* Update size-limit test

* Update prefetch

* measures fid

* updates typings, fixes logic, updates per review comments

* update to es5

* separate clearMeasures

* use relayer

* creates fid polyfll render helper + simplifies measure

* switch to dynamic import

* creates fid experimental flag

* removes unecessary time-to-first-input metric

* removes hydration measure removes

* default flag to false
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Externalize  from Server Builds

* Windows Compatibility for Plugins

* Only check for windows path on windows

* add comments

* Make sure to handle "next" import gracefully

* Update test file

* Remove req.env

* Rename NEXT_APP_ to NEXT_PUBLIC_

* Remove key exposing env config

* Update tests

* Update NEXT_APP_ test to NEXT_PUBLIC_

Fixes #11390

Fixes #11390

* Add initial support for new env config file

* Fix serverless processEnv call when no env is provided

* Add missing await for test method

* Update env config to .env.json and add dotenv loading

* ncc dotenv package

* Update type

* Update with new discussed behavior removing .env.json

* Update hot-reloader createEntrypoints

* Make sure .env is loaded before next.config.js

* Add tests for all separate .env files

* Remove comments

* Add override tests

* Add test for overriding env vars based on local environment

* Add support for .env.test

* Apply suggestions from code review
Co-Authored-By: NJoe Haddad <joe.haddad@zeit.co>

* Use chalk for env loaded message

* Remove constant as it’s not needed

* Update test

* Update errsh, taskr, and CNA template ignores

* Make sure to only consider undefined missing

* Remove old .env ignore

* Update to not populate process.env with loaded env

* Add experimental flag and add loading of global env values
Co-authored-by: NTim Neutkens <timneutkens@me.com>
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Add support for tsconfig/json `paths` option

* Add tests for paths in tsconfig.json

* Don't apply aliases when paths is empty

* Clean up unused methods and link to TypeScript license

* Add tests for jsconfig

* Put feature under an experimental flag

* Enable to see if tests pass

* Update types

* Add feature under an experimental flag

* Add support for baseUrl option in tsconfig and jsconfig

* Move jsconfigPath

* Remove filter

* Add support for SCSS includePaths

* Support sassOptions instead of just includePaths
Co-authored-by: NTim Neutkens <timneutkens@me.com>
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* adding tests  for rect sync conformance check

* adding test for react sync script conformance check

* reverting yarn lock changes

* adding duplicate polyfill conformance

* bug fixes in dulpicate polyfill conformance check

* adding settings capability to conformance plugin

* removing minification check from server build

* bug fix

* settings for react sync script check

* Adding native-url package

* Bumping native-url version

* Upgrading native-url

* Logging stats object for debugging

* Logging stats object for debugging

* Adding try catch to the error lines

* Experimenting with regex

* Experimenting with regex

* Experimenting with regex

* Testing regex changes

* Fixing defer-script test case to not include polyfill.js

* Meging changes with existing polyfill work

* Bumping version

* adjust webpack config

* Reduce size in size test

* Remove 1kb from legacy

* Bumping native-url version, includes fix for IE11

* Update lock file

* Updating native-url, fixes issue on IE11

* Fix sourcemap being added in document

* Adding Router as an app level dep. Fixes Router not being added as a dep to pages without Link when granularChunks is enabled

* Fix typescript error

* Fix modern + granularChunks hydration failing

* Fix TS error

* Update native-url version

* Adding native-url with safari fix

* Update url-polyfill in polyfill-nomodule package

* Remove url-polyfill from next package.json
Co-authored-by: NTim Neutkens <tim@timneutkens.nl>
Co-authored-by: NJJ Kasper <jj@jjsweb.site>
Co-authored-by: NJoe Haddad <timer150@gmail.com>

This reverts commit b329f6a2.

* Adding native-url package

* Bumping native-url version

* Upgrading native-url

* Logging stats object for debugging

* Logging stats object for debugging

* Adding try catch to the error lines

* Experimenting with regex

* Experimenting with regex

* Experimenting with regex

* Testing regex changes

* Fixing defer-script test case to not include polyfill.js

* Meging changes with existing polyfill work

* Bumping version

* adjust webpack config

* Reduce size in size test

* Remove 1kb from legacy

* Bumping native-url version, includes fix for IE11

* Update lock file

* Updating native-url, fixes issue on IE11

* Fix sourcemap being added in document

* Adding Router as an app level dep. Fixes Router not being added as a dep to pages without Link when granularChunks is enabled

* Fix typescript error

* Fix modern + granularChunks hydration failing

* Fix TS error

* Update native-url version

* Adding native-url with safari fix
Co-authored-by: NTim Neutkens <tim@timneutkens.nl>
Co-authored-by: NJJ Kasper <jj@jjsweb.site>
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Disable setImmediate polyfill

* Update size-limit
Co-authored-by: NJoe Haddad <timer150@gmail.com>
Co-authored-by: NJJ Kasper <jj@jjsweb.site>

* Enable polyfillsOptimization

* Update sizes

* Commons is no longer there

* Update test

* Remove ts-ignore where possible

And replace by typecasts

* More accurate types

* bend cliententries in a correct shape earlier on

* comment becomes unnecessary

* add webpack overload to allow for the next.js use case

* Avoid changing public interface
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Remove `native-url` Again

* update comment

* update sizes

* Re-enable `native-url`

* update sizes

* Modify splitChunksPlugin to give shared CSS chunks different names

* fix lint
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>

* adding Conformance Plugin behind a flag

* fixing compiler ts error

* fixing spelling errors 🤦🏻‍♂️

* addressing comments

* bug fix

* making it const enum

* reverting const enum
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Add built-in Sass support

* Add copy of CSS tests for SCSS

* Fix failing tests

* Fix url-loader tests

* Remove css file generated by tests

* Fix nprogress import for css file

* Fix SCSS modules (still 2 tests that need investigating)

* Update documentation for Sass support

* Fix plain CSS import test

* Fix formatting with prettier fix

* Update test output to reflect scss usage

* Revert "Fix plain CSS import test"

This reverts commit 380319d9d0c4bfb19e28c210262ccd82d19f3556.

# Conflicts:
#	test/integration/scss-modules/test/index.test.js

* Update loader structure

* Resolve loaders before passing to compile function

* Remove dead filter  code

* Arrange loaders in order and push to array

* Fix loader order bug

* Fix global Sass loader and make module prepocessor optional

* Adjust Sass Modules Implementation

* Fix typo

* Adjust regexps

* Use regexes

* Simplify global setup

* Adjust comments

* fix regex

* Simplify identifier file

* Update Sass Instructions

* Remove unneeded fixtures

* Adjust global tests

* Remove wrapper

* Update source maps

* Flag scss behavior

* Fix css property value

* Update fixtures with Sass vars

* Turn on Scss support

* fix HMR test

* Fix snapshots
Co-authored-by: NTim Neutkens <tim@timneutkens.nl>
Co-authored-by: NJoe Haddad <timer150@gmail.com>