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With this change we reduce the reliance on the TypeScript target compiler option to output a certain ECMA version. Instead we now use the browsers that are configured in the Browserslist configuration to determine which ECMA features and version are needed. This is done by passing the transpiled TypeScript to Babel preset-env. **Note about useDefineForClassFields**: while setting this to `false` will output JavaScript which is not spec compliant, this is needed because TypeScript introduced class fields many years before it was ratified in TC39. The latest version of the spec have a different runtime behavior to TypeScript’s implementation but the same syntax. Therefore, we opt-out from using upcoming ECMA runtime behavior to better support the ECO system and libraries that depend on the non spec compliant output. One of biggest case is usages of the deprecated `@Effect` decorator by NGRX and potentially other existing code as well which otherwise would cause runtime failures. Dropping `useDefineForClassFields` will be considered in a future major releases. For more information see: https://github.com/microsoft/TypeScript/issues/45995. BREAKING CHANGE: Internally the Angular CLI now always set the TypeScript `target` to `ES2022` and `useDefineForClassFields` to `false` unless the target is set to `ES2022` or later in the TypeScript configuration. To control ECMA version and features use the Browerslist configuration.
HelloWorldApp
This project was generated with Angular CLI version 1.7.0-beta.1.
Development server
Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.
Code scaffolding
Run ng generate component component-name to generate a new component. You can also use ng generate directive|pipe|service|class|guard|interface|enum|module.
Build
Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the -prod flag for a production build.
Running unit tests
Run ng test to execute the unit tests via Karma.
Running end-to-end tests
Run ng e2e to execute the end-to-end tests via Protractor.
Further help
To get more help on the Angular CLI use ng help or go check out the Angular CLI README.