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docs(angular): note jest transformIgnorePatterns for es modules #3298

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Dec 11, 2023
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docs(angular): note jest transformIgnorePatterns for es modules #3298

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docs(angular): note jest transformIgnorePatterns for es modules
liamdebeasi Dec 7, 2023
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add pnpm example
liamdebeasi Dec 8, 2023
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lint
liamdebeasi Dec 11, 2023
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49 changes: 49 additions & 0 deletions docs/angular/build-options.md
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@@ -1,3 +1,6 @@
import Tabs from '@theme/Tabs';
import TabItem from '@theme/TabItem';

# Build Options

Developers have two options for using Ionic components: Standalone or Modules. This guide covers both options as well as the benefits and downsides of each approach.
Expand Down Expand Up @@ -175,6 +178,29 @@ export class HomePage {}
<ion-button routerLink="/foo" routerDirection="root">Go to Foo Page</ion-button>
```

**Testing**

Ionic Angular's standalone components use ES Modules. As a result, developers using Jest should ensure that ES Modules are transpiled to a format that Jest can use. Developers using Jest should add the following to their Jest config:

<Tabs groupId="package-manager" defaultValue="npm" values={[{ value: 'npm', label: 'npm' }, { value: 'pnpm', label: 'pnpm' }]}>
<TabItem value="npm">

```json

"transformIgnorePatterns": ["<rootDir>/node_modules/(?!(@ionic/angular|@ionic/core|ionicons|@stencil/core|@angular/*)/)"]
```

</TabItem>
<TabItem value="pnpm">

```json

"transformIgnorePatterns": ["<rootDir>/node_modules/.pnpm/(?!(@ionic/angular|@ionic/core|ionicons|@stencil/core|@angular/*)@)"]
```

</TabItem>
</Tabs>

### Usage with NgModule-based Applications

:::caution
Expand Down Expand Up @@ -315,6 +341,29 @@ export class HomePageModule {}
<ion-button routerLink="/foo" routerDirection="root">Go to Foo Page</ion-button>
```

**Testing**

Ionic Angular's standalone components use ES Modules. As a result, developers using Jest should ensure that ES Modules are transpiled to a format that Jest can use. Developers using Jest should add the following to their Jest config:

<Tabs groupId="package-manager" defaultValue="npm" values={[{ value: 'npm', label: 'npm' }, { value: 'pnpm', label: 'pnpm' }]}>
<TabItem value="npm">

```json

"transformIgnorePatterns": ["<rootDir>/node_modules/(?!(@ionic/angular|@ionic/core|ionicons|@stencil/core|@angular/*)/)"]
```

</TabItem>
<TabItem value="pnpm">

```json

"transformIgnorePatterns": ["<rootDir>/node_modules/.pnpm/(?!(@ionic/angular|@ionic/core|ionicons|@stencil/core|@angular/*)@)"]
```

</TabItem>
</Tabs>

## Modules

### Overview
Expand Down