v12.0.0-rc.0

Commits

@angular-devkit/build-angular (12.0.0-rc.0)
Commit	Description	Notes
	avoid double build optimizer processing
	replace Webpack 4 `hashForChunk` hook usage
	use new Webpack watch API in karma webpack plugin
	recover from CSS optimization errors
	disable Webpack 5 automatic public path support
	always inject live reload client when using live reload
	change several builder options defaults
	show warning when using stylus
	set Tailwind CSS mode when using Tailwind
	avoid triggering file change after file build
	use Webpack's GC memory caching in watch mode
@angular/cli (12.0.0-rc.0)
Commit	Description	Notes
	ignore `tsickle` during updates
	run all migrations when updating from or between prereleases
@ngtools/webpack (12.0.0-rc.0)
Commit	Description	Notes
	only track actual resource file dependencies
	cache results of processed inline resources
@schematics/angular (12.0.0-rc.0)
Commit	Description	Notes
	set `inlineStyleLanguage` when application `style` option is used
	set `inlineStyleLanguage` for universal if present in build options

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Breaking Changes

@schematics/angular: remove `stylus` from `style` options (fd729ac)

`styl` (Stylus) is no longer a supported value as `style` in `application`, `component`, `ng-new` schematics. Stylus is not actively maintained and only 0.3% of the Angular CLI users use it.

(cherry picked from commit 0272fc5)

@angular-devkit/build-angular: change several builder options defaults (656f8d7)

A number of browser and server builder options have had their default values changed. The aim of these changes is to reduce the configuration complexity and support the new "production builds by default" initiative.

Browser builder

Option	Previous default value	New default value
optimization	false	true
aot	false	true
buildOptimizer	false	true
sourceMap	true	false
extractLicenses	false	true
namedChunks	true	false
vendorChunk	true	false

Server builder

Option	Previous default value	New default value
optimization	false	true
sourceMap	true	false

(cherry picked from commit 0a74d0d)

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Special Thanks

Alan Agius, Charles Lyding, Keen Yee Liau, Joey Perrott, David Shevitz