43ecf8a77b
`@angular/platform-server` provides the foundation for rendering an Angular app on the server. In order to achieve that, it uses a server-side DOM implementation (currently [domino][1]). For rendering on the server to work as closely as possible to running the app on the browser, we need to make DOM globals (such as `Element`, `HTMLElement`, etc.), which are normally provided by the browser, available as globals on the server as well. Currently, `@angular/platform-server` achieves this by extending the `global` object with the DOM implementation provided by `domino`. This assignment happens in the [setDomTypes()][2] function, which is [called in a `PLATFORM_INITIALIZER`][3]. While this works in most cases, there are some scenarios where the DOM globals are needed sooner (i.e. before initializing the platform). See, for example, #24551 and #39950 for more details on such issues. This commit provides a way to solve this problem by exposing a side-effect-ful entry-point (`@angular/platform-server/init`), that shims the `global` object with DOM globals. People will be able to import this entry-point in their server-rendered apps before bootstrapping the app (for example, in their `main.server.ts` file). (See also [#39950 (comment)][4].) In a future update, the [`universal` schematics][5] will include such an import by default in newly generated projects. [1]: https://www.npmjs.com/package/domino [2]: https://github.com/angular/angular/blob/0fc8466f1be392917e0c/packages/platform-server/src/domino_adapter.ts#L17-L21 [3]: https://github.com/angular/angular/blob/0fc8466f1be392917e0c/packages/platform-server/src/server.ts#L33 [4]: https://github.com/angular/angular/issues/39950#issuecomment-747598403 [5]: https://github.com/angular/angular-cli/blob/cc51432661eb4ab4b6a3/packages/schematics/angular/universal PR Close #40559
Angular
The sources for this package are in the main Angular repo. Please file issues and pull requests against that repo.
Usage information and reference details can be found in Angular documentation.
License: MIT