Missing @Injectable and incomplete provider definition migration. In Angular 9, enforcement of @Injectable decorators for DI is a bit stricter and incomplete provider definitions behave differently. Read more about this here: https://v9.angular.io/guide/migration-injectable

ModuleWithProviders migration. In Angular 9, the ModuleWithProviders type without a generic has been deprecated. This migration adds the generic where it is missing. Read more about this here: https://v9.angular.io/guide/migration-module-with-providers

Undecorated classes with decorated fields migration. As of Angular 9, it is no longer supported to have Angular field decorators on a class that does not have an Angular decorator. Read more about this here: https://v9.angular.io/guide/migration-undecorated-classes

Remove deprecated 'es5BrowserSupport' browser builder option. The inclusion for ES5 polyfills will be determined from the browsers listed in the browserslist configuration.

Update Browserslist configuration file name to '.browserslistrc' from deprecated 'browserslist'.

Replace deprecated and removed 'styleext' and 'spec' Angular schematic options with 'style' and 'skipTests', respectively.

Add the tslint deprecation rule to tslint JSON configuration files.

Update tslint to version 6 and adjust rules to maintain existing behavior.

Remove deprecated options from 'angular.json' that are no longer present in v10.

Update library projects to use tslib version 2 as a direct dependency. Read more about this here: https://v10.angular.io/guide/migration-update-libraries-tslib

Update workspace dependencies to match a new v10 project.

Update 'module' and 'target' TypeScript compiler options. Read more about this here: https://v10.angular.io/guide/migration-update-module-and-target-compiler-options

Removing "Solution Style" TypeScript configuration file support.