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nx/docs/shared/recipes/module-federation/creating-a-host.md
Jack Hsu 8fa7065cf1
docs(misc): update generator examples to use new directory/path positional args (#28144) 
This PR updates examples in `.md` files (both docs and blog posts) to
use positional args. Nx 20 changes the position arg to be either
`directory` for apps/libs or `path` for artifacts (e.g. components).

So before you'd do this:

```
nx g app myapp --directory=apps/myapp
nx g lib mylib --directory=libs/mylib
nx g lib mylib --directory=libs/nested/mylib
nx g lib @acme/foo --directory=libs/@acme/foo --importPath=@acme/foo
nx g component foo --directory=libs/ui/src/foo --pascalCaseFiles
```

Will now be simplified to

```
nx g app apps/myapp
nx g lib libs/mylib
nx g lib libs/nested/mylib
nx g lib libs/@acme/foo # name and import path are both "@acme/foo"
nx g component libs/ui/src/foo/Foo
```

For cases where `name` and `importPath` need to be changed, you can
always manually specify them.

```
nx g lib libs/nested/foo # name is foo
nx g lib libs/nested/foo --name=nested-foo # specify name with prefix
nx g lib libs/@acme/foo --name # use "foo" as name and don't match importPath
nx g lib libs/@internal/foo --importPath=@acme/foo # different importPath from name

<!-- If this is a particularly complex change or feature addition, you can request a dedicated Nx release for this pull request branch. Mention someone from the Nx team or the `@nrwl/nx-pipelines-reviewers` and they will confirm if the PR warrants its own release for testing purposes, and generate it for you if appropriate. -->

## Current Behavior
<!-- This is the behavior we have today -->

## Expected Behavior
<!-- This is the behavior we should expect with the changes in this PR -->

## Related Issue(s)
<!-- Please link the issue being fixed so it gets closed when this is merged. -->

Fixes #
2024-09-30 13:20:10 -04:00

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# Creating a Host
A `host` is the term within [Module Federation](https://module-federation.io/docs/en/mf-docs/0.2/getting-started/) given
to an application that loads and consumes federated modules
from `remotes`. At build time, these modules do not exist and are instead fetched via a network request and executed at
runtime. It can be likened to a modern-day approach to iframes.
A host can be configured to know the location of the federated modules at build time _(called Static Federation)_ or it
can employ a mechanism to discover the location of the federated modules at runtime, usually on startup _(called Dynamic
Federation)_.
**Nx** includes first-class support for helping you to scaffold a Module Federation Architecture for your React and
Angular application(s).
## Generating a Host
To generate only a host application in your workspace, run the following command:
{% tabs %}
{% tab label="React" %}
```{% command="nx g @nx/react:host apps/shell --directory=apps/react/shell" %}
NX Generating @nx/react:host
CREATE apps/react/shell/src/app/app.spec.tsx
CREATE apps/react/shell/src/assets/.gitkeep
CREATE apps/react/shell/src/environments/environment.prod.ts
CREATE apps/react/shell/src/environments/environment.ts
CREATE apps/react/shell/src/favicon.ico
CREATE apps/react/shell/src/index.html
CREATE apps/react/shell/tsconfig.app.json
CREATE apps/react/shell/webpack.config.ts
CREATE apps/react/shell/.babelrc
CREATE apps/react/shell/src/app/nx-welcome.tsx
CREATE apps/react/shell/src/app/app.module.css
CREATE apps/react/shell/src/app/app.tsx
CREATE apps/react/shell/src/styles.css
CREATE apps/react/shell/tsconfig.json
CREATE apps/react/shell/project.json
CREATE apps/react/shell/.eslintrc.json
CREATE apps/react/shell/jest.config.ts
CREATE apps/react/shell/tsconfig.spec.json
CREATE apps/react/shell/src/bootstrap.tsx
CREATE apps/react/shell/module-federation.config.ts
CREATE apps/react/shell/src/main.ts
CREATE apps/react/shell/webpack.config.prod.ts
```
{% /tab %}
{% tab label="Angular" %}
```{% command="nx g @nx/angular:host apps/shell --directory=apps/angular/shell" %}
NX Generating @nx/angular:host
CREATE apps/angular/shell/project.json
CREATE apps/angular/shell/src/assets/.gitkeep
CREATE apps/angular/shell/src/favicon.ico
CREATE apps/angular/shell/src/index.html
CREATE apps/angular/shell/src/styles.css
CREATE apps/angular/shell/tsconfig.app.json
CREATE apps/angular/shell/tsconfig.editor.json
CREATE apps/angular/shell/tsconfig.json
CREATE apps/angular/shell/src/app/app.component.css
CREATE apps/angular/shell/src/app/app.component.html
CREATE apps/angular/shell/src/app/app.component.spec.ts
CREATE apps/angular/shell/src/app/app.component.ts
CREATE apps/angular/shell/src/app/app.routes.ts
CREATE apps/angular/shell/src/app/nx-welcome.component.ts
CREATE apps/angular/shell/src/main.ts
CREATE apps/angular/shell/.eslintrc.json
CREATE apps/angular/shell/jest.config.ts
CREATE apps/angular/shell/src/test-setup.ts
CREATE apps/angular/shell/tsconfig.spec.json
CREATE apps/angular/shell/module-federation.config.ts
CREATE apps/angular/shell/webpack.config.ts
CREATE apps/angular/shell/webpack.prod.config.ts
CREATE apps/angular/shell/src/bootstrap.ts
```
{% /tab %}
{% /tabs %}
### Scaffold a Host with Remotes
To scaffold a host application along with remote applications in your workspace, run the following command:
{% tabs %}
{% tab label="React" %}
```{% command="nx g @nx/react:host apps/react/with-remotes/shell --remotes=remote1,remote2" %}
NX Generating @nx/react:host
CREATE apps/react/with-remotes/shell/src/app/app.spec.tsx
CREATE apps/react/with-remotes/shell/src/assets/.gitkeep
CREATE apps/react/with-remotes/shell/src/environments/environment.prod.ts
CREATE apps/react/with-remotes/shell/src/environments/environment.ts
CREATE apps/react/with-remotes/shell/src/favicon.ico
CREATE apps/react/with-remotes/shell/src/index.html
CREATE apps/react/with-remotes/shell/tsconfig.app.json
CREATE apps/react/with-remotes/shell/webpack.config.ts
CREATE apps/react/with-remotes/shell/.babelrc
CREATE apps/react/with-remotes/shell/src/app/nx-welcome.tsx
CREATE apps/react/with-remotes/shell/src/app/app.module.css
CREATE apps/react/with-remotes/shell/src/app/app.tsx
CREATE apps/react/with-remotes/shell/src/styles.css
CREATE apps/react/with-remotes/shell/tsconfig.json
CREATE apps/react/with-remotes/shell/project.json
CREATE apps/react/with-remotes/shell/.eslintrc.json
CREATE apps/react/with-remotes/shell/jest.config.ts
CREATE apps/react/with-remotes/shell/tsconfig.spec.json
CREATE apps/react/with-remotes/shell/src/bootstrap.tsx
CREATE apps/react/with-remotes/shell/module-federation.config.ts
CREATE apps/react/with-remotes/shell/src/main.ts
CREATE apps/react/with-remotes/shell/webpack.config.prod.ts
CREATE apps/react/with-remotes/remote1/src/app/app.spec.tsx
CREATE apps/react/with-remotes/remote1/src/assets/.gitkeep
CREATE apps/react/with-remotes/remote1/src/environments/environment.prod.ts
CREATE apps/react/with-remotes/remote1/src/environments/environment.ts
CREATE apps/react/with-remotes/remote1/src/favicon.ico
CREATE apps/react/with-remotes/remote1/src/index.html
CREATE apps/react/with-remotes/remote1/tsconfig.app.json
CREATE apps/react/with-remotes/remote1/webpack.config.ts
CREATE apps/react/with-remotes/remote1/.babelrc
CREATE apps/react/with-remotes/remote1/src/app/nx-welcome.tsx
CREATE apps/react/with-remotes/remote1/src/app/app.module.css
CREATE apps/react/with-remotes/remote1/src/app/app.tsx
CREATE apps/react/with-remotes/remote1/src/styles.css
CREATE apps/react/with-remotes/remote1/tsconfig.json
CREATE apps/react/with-remotes/remote1/project.json
CREATE apps/react/with-remotes/remote1/.eslintrc.json
CREATE apps/react/with-remotes/remote1/jest.config.ts
CREATE apps/react/with-remotes/remote1/tsconfig.spec.json
CREATE apps/react/with-remotes/remote1/src/bootstrap.tsx
CREATE apps/react/with-remotes/remote1/module-federation.config.ts
CREATE apps/react/with-remotes/remote1/src/main.ts
CREATE apps/react/with-remotes/remote1/src/remote-entry.ts
CREATE apps/react/with-remotes/remote1/webpack.config.prod.ts
UPDATE tsconfig.base.json
CREATE apps/react/with-remotes/remote2/src/app/app.spec.tsx
CREATE apps/react/with-remotes/remote2/src/assets/.gitkeep
CREATE apps/react/with-remotes/remote2/src/environments/environment.prod.ts
CREATE apps/react/with-remotes/remote2/src/environments/environment.ts
CREATE apps/react/with-remotes/remote2/src/favicon.ico
CREATE apps/react/with-remotes/remote2/src/index.html
CREATE apps/react/with-remotes/remote2/tsconfig.app.json
CREATE apps/react/with-remotes/remote2/webpack.config.ts
CREATE apps/react/with-remotes/remote2/.babelrc
CREATE apps/react/with-remotes/remote2/src/app/nx-welcome.tsx
CREATE apps/react/with-remotes/remote2/src/app/app.module.css
CREATE apps/react/with-remotes/remote2/src/app/app.tsx
CREATE apps/react/with-remotes/remote2/src/styles.css
CREATE apps/react/with-remotes/remote2/tsconfig.json
CREATE apps/react/with-remotes/remote2/project.json
CREATE apps/react/with-remotes/remote2/.eslintrc.json
CREATE apps/react/with-remotes/remote2/jest.config.ts
CREATE apps/react/with-remotes/remote2/tsconfig.spec.json
CREATE apps/react/with-remotes/remote2/src/bootstrap.tsx
CREATE apps/react/with-remotes/remote2/module-federation.config.ts
CREATE apps/react/with-remotes/remote2/src/main.ts
CREATE apps/react/with-remotes/remote2/src/remote-entry.ts
CREATE apps/react/with-remotes/remote2/webpack.config.prod.ts
```
{% /tab %}
{% tab label="Angular" %}
```{% command="nx g @nx/angular:host apps/angular/with-remotes/shell --remotes=remote1,remote2" %}
> NX Generating @nx/angular:host
CREATE apps/angular/with-remotes/shell/project.json
CREATE apps/angular/with-remotes/shell/src/assets/.gitkeep
CREATE apps/angular/with-remotes/shell/src/favicon.ico
CREATE apps/angular/with-remotes/shell/src/index.html
CREATE apps/angular/with-remotes/shell/src/styles.css
CREATE apps/angular/with-remotes/shell/tsconfig.app.json
CREATE apps/angular/with-remotes/shell/tsconfig.editor.json
CREATE apps/angular/with-remotes/shell/tsconfig.json
CREATE apps/angular/with-remotes/shell/src/app/app.component.css
CREATE apps/angular/with-remotes/shell/src/app/app.component.html
CREATE apps/angular/with-remotes/shell/src/app/app.component.spec.ts
CREATE apps/angular/with-remotes/shell/src/app/app.component.ts
CREATE apps/angular/with-remotes/shell/src/app/app.routes.ts
CREATE apps/angular/with-remotes/shell/src/app/nx-welcome.component.ts
CREATE apps/angular/with-remotes/shell/src/main.ts
CREATE apps/angular/with-remotes/shell/.eslintrc.json
CREATE apps/angular/with-remotes/shell/jest.config.ts
CREATE apps/angular/with-remotes/shell/src/test-setup.ts
CREATE apps/angular/with-remotes/shell/tsconfig.spec.json
CREATE apps/angular/with-remotes/shell/module-federation.config.ts
CREATE apps/angular/with-remotes/shell/webpack.config.ts
CREATE apps/angular/with-remotes/shell/webpack.prod.config.ts
CREATE apps/angular/with-remotes/shell/src/bootstrap.ts
CREATE apps/angular/with-remotes/ng-remote1/project.json
CREATE apps/angular/with-remotes/ng-remote1/src/assets/.gitkeep
CREATE apps/angular/with-remotes/ng-remote1/src/favicon.ico
CREATE apps/angular/with-remotes/ng-remote1/src/index.html
CREATE apps/angular/with-remotes/ng-remote1/src/styles.css
CREATE apps/angular/with-remotes/ng-remote1/tsconfig.app.json
CREATE apps/angular/with-remotes/ng-remote1/tsconfig.editor.json
CREATE apps/angular/with-remotes/ng-remote1/tsconfig.json
CREATE apps/angular/with-remotes/ng-remote1/src/app/app.component.ts
CREATE apps/angular/with-remotes/ng-remote1/src/app/app.routes.ts
CREATE apps/angular/with-remotes/ng-remote1/src/main.ts
CREATE apps/angular/with-remotes/ng-remote1/.eslintrc.json
CREATE apps/angular/with-remotes/ng-remote1/jest.config.ts
CREATE apps/angular/with-remotes/ng-remote1/src/test-setup.ts
CREATE apps/angular/with-remotes/ng-remote1/tsconfig.spec.json
CREATE apps/angular/with-remotes/ng-remote1/src/app/remote-entry/entry.component.ts
CREATE apps/angular/with-remotes/ng-remote1/src/app/remote-entry/entry.routes.ts
CREATE apps/angular/with-remotes/ng-remote1/src/app/remote-entry/nx-welcome.component.ts
CREATE apps/angular/with-remotes/ng-remote1/module-federation.config.ts
CREATE apps/angular/with-remotes/ng-remote1/webpack.config.ts
CREATE apps/angular/with-remotes/ng-remote1/webpack.prod.config.ts
CREATE apps/angular/with-remotes/ng-remote1/src/bootstrap.ts
UPDATE tsconfig.base.json
CREATE apps/angular/with-remotes/ng-remote2/project.json
CREATE apps/angular/with-remotes/ng-remote2/src/assets/.gitkeep
CREATE apps/angular/with-remotes/ng-remote2/src/favicon.ico
CREATE apps/angular/with-remotes/ng-remote2/src/index.html
CREATE apps/angular/with-remotes/ng-remote2/src/styles.css
CREATE apps/angular/with-remotes/ng-remote2/tsconfig.app.json
CREATE apps/angular/with-remotes/ng-remote2/tsconfig.editor.json
CREATE apps/angular/with-remotes/ng-remote2/tsconfig.json
CREATE apps/angular/with-remotes/ng-remote2/src/app/app.component.ts
CREATE apps/angular/with-remotes/ng-remote2/src/app/app.routes.ts
CREATE apps/angular/with-remotes/ng-remote2/src/main.ts
CREATE apps/angular/with-remotes/ng-remote2/.eslintrc.json
CREATE apps/angular/with-remotes/ng-remote2/jest.config.ts
CREATE apps/angular/with-remotes/ng-remote2/src/test-setup.ts
CREATE apps/angular/with-remotes/ng-remote2/tsconfig.spec.json
CREATE apps/angular/with-remotes/ng-remote2/src/app/remote-entry/entry.component.ts
CREATE apps/angular/with-remotes/ng-remote2/src/app/remote-entry/entry.routes.ts
CREATE apps/angular/with-remotes/ng-remote2/src/app/remote-entry/nx-welcome.component.ts
CREATE apps/angular/with-remotes/ng-remote2/module-federation.config.ts
CREATE apps/angular/with-remotes/ng-remote2/webpack.config.ts
CREATE apps/angular/with-remotes/ng-remote2/webpack.prod.config.ts
CREATE apps/angular/with-remotes/ng-remote2/src/bootstrap.ts
```
{% /tab %}
{% /tabs %}
## Serving your Host
Your `host` application acts like any other application in the context of Nx, and therefore serving it locally is as
simple as running:
```shell
nx serve shell
```
When you serve your `host`, Nx will discover any dependent remote applications that are also in the workspace and serve them statically. To learn more about check out our in-depth breakdown of [what happens when you serve your host](/concepts/module-federation/nx-module-federation-technical-overview#what-happens-when-you-serve-your-host).
## Building your Host
In the same vein, you can build your host by running:
```shell
nx build shell
```
To support [Independent Deployability](/concepts/module-federation/module-federation-and-nx#independent-deployability) `host` applications do not have `implicitDependencies` set in their `project.json`. If you want to build all your `remotes` when you build your `host`, add `implicitDependencies` to your `host`'s `project.json` with each `remote` listed:
```json
{
...,
"implicitDependencies": ["remote-one", "remote-two"]
}
```
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