app-shell-long

An app shell lets Universal render a portion of your application via a route at build time. This gives users a meaningful first paint of your application that appears quickly because the browser can simply render the HTML without the need to initialize any JavaScript.

Use this command with a routing app that is accompanied by a Universal server-side app.

To create an app shell, use the following command.

<code-example format="." language="bash"> ng generate app-shell my-app </code-example>

- `my-app` is the name of your client application
- `server-app` is the name of the Universal (server) application

The command adds two new architect build targets to your `angular.json` configuration file (along with a few other changes).

<code-example format="." language="none" linenums="false"> "server": { "builder": "@angular-devkit/build-angular:server", "options": { "outputPath": "dist/my-app-server", "main": "src/main.server.ts", "tsConfig": "src/tsconfig.server.json" } }, "app-shell": { "builder": "@angular-devkit/build-angular:app-shell", "options": { "browserTarget": "my-app:build", "serverTarget": "my-app:server", "route": "shell" } } </code-example>

To verify the that the app has been built with the default shell content:

1. Run the app-shell target.

   <code-example format="." language="bash"> ng run my-app:app-shell </code-example>

1. Open `dist/app-shell/index.html` in your browser.

The default text "app-shell works!" verifies that the app-shell route was rendered as part of the output.