classlist.js and web-animations-js are removed from application polyfills and uninstalled from the package. These were only needed for compatibility with Internet Explorer, which is no longer needed now that Angular only supports evergreen browsers. See: https://angular.io/guide/browser-support.

Add the following to the polyfills file for an app to re-add these packages:

import 'classlist.js';
import 'web-animations-js';

And then run:

npm install classlist.js web-animations-js --save

@angular-devkit/build-angular

Inlining of critical CSS is no longer enable by default. Users already on Angular CLI version 12 and have not opted-out from using this feature are encouraged to opt-in using the browser builder inlineCritical option.
NG_PERSISTENT_BUILD_CACHE environment variable option no longer have effect. Configure cli.cache in the workspace configuration instead.

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "cli": {
    "cache": {
      "enabled": true,
      "path": ".custom-cache-path",
      "environment": "all"
    }
  }
  ...
}

Deprecations

@angular-devkit/build-optimizer

It's functionality has been included in @angular-devkit/build-angular so this package is no longer needed by the CLI and we will stop publishing the package soon. It has been an experimental (never hit 1.0.0) and internal (only used by Angular itself) package and should be not be used directly by others.

@angular-devkit/build-angular

NG_BUILD_CACHE environment variable option will be removed in the next major version. Configure cli.cache in the workspace configuration instead. ### @schematics/angular | Commit | Description | | -- | -- | | | add /.angular/cache to .gitignore | | | drop polyfills required only for Internet Explorer now that support has been dropped for it | | | don't add destroyAfterEach in newly generated spec files | ### @angular/cli | Commit | Description | | -- | -- | | | officially support Node.js v16 | | | update the update command to fully support Node.js v16 | ### | Commit | Description | | -- | -- | | | mark @angular-devkit/build-optimizer as deprecated. | ### @angular-devkit/architect | Commit | Description | | -- | -- | | | include workspace extensions in project metadata | ### @angular-devkit/build-angular | Commit | Description | | -- | -- | | | disable critical CSS inlining by default | | | enable disk cache by default and provide configurable options | | | enable custom es2020 and es2015 conditional exports | | | improve fidelity and performance of babel loader sourcemaps | ### @angular-devkit/core | Commit | Description | | -- | -- | | | support Node.js v16 with NodeJsSyncHost/NodeJsAsyncHost delete operation | ## Special Thanks Alan Agius, Charles Lyding, Doug Parker and Joey Perrott