docs.sheetjs.com/docz/docs/03-demos/05-mobile/04-ionic.md

---
title: Ionic
pagination_prev: demos/static/index
pagination_next: demos/desktop/index
sidebar_position: 4
sidebar_custom_props:
  summary: Native Components + Web View
---

import current from '/version.js';

The [NodeJS Module](/docs/getting-started/installation/nodejs) can be imported
from the main entrypoint or any script in the project.

The "Complete Example" creates an app that looks like the screenshots below:

<table><thead><tr>
  <th><a href="#demo">iOS</a></th>
  <th><a href="#demo">Android</a></th>
</tr></thead><tbody><tr><td>

![iOS screenshot](pathname:///ionic/ios.png)

</td><td>

![Android screenshot](pathname:///ionic/and.png)

</td></tr></tbody></table>


:::warning Telemetry

Before starting this demo, manually disable telemetry.  On Linux and MacOS:

```bash
rm -rf ~/.ionic/
mkdir ~/.ionic
cat <<EOF > ~/.ionic/config.json
{
  "version": "6.20.1",
  "telemetry": false,
  "npmClient": "npm"
}
EOF
npx @capacitor/cli telemetry off
```

To verify telemetry was disabled:

```bash
npx @ionic/cli config get -g telemetry
npx @capacitor/cli telemetry
```

:::

## Integration Details

:::caution

The latest version of Ionic uses CapacitorJS. These notes are for Cordova apps.

:::

### Angular

`Array<Array<any>>` neatly maps to a table with `ngFor`:

```html
<ion-grid>
  <ion-row *ngFor="let row of data">
    <ion-col *ngFor="let val of row">
      {{val}}
    </ion-col>
  </ion-row>
</ion-grid>
```

### Cordova

`@ionic-native/file` reads and writes files on devices.

_Reading Files_

`readAsArrayBuffer` returns `ArrayBuffer` objects suitable for `array` type:

```ts
/* read a workbook */
const ab: ArrayBuffer = await this.file.readAsArrayBuffer(url, filename);
const wb: XLSX.WorkBook = XLSX.read(ab, {type: 'array'});
```

_Writing Files_

`array` type can be converted to blobs that can be exported with `writeFile`:


```ts
/* write a workbook */
const wbout: ArrayBuffer = XLSX.write(wb, { bookType: 'xlsx', type: 'array' });
let blob = new Blob([wbout], {type: 'application/octet-stream'});
this.file.writeFile(url, filename, blob, {replace: true});
```

## Demo

:::note

This demo was tested on an Intel Mac on 2023 March 28 with Cordova.
The file integration uses `@ionic-native/file` version `5.36.0`.

The iOS simulator runs iOS 15.5 on an iPhone SE (3rd Generation).

The Android simulator runs Android 12.0 (S) API 31 on a Pixel 3.

:::

0) Disable telemetry as noted in the warning.

Install required global dependencies:

```bash
npm i -g cordova-res @angular/cli native-run @ionic/cli
```

Follow the [React Native demo](/docs/demos/mobile/reactnative) to ensure iOS and Android sims are ready.


1) Create a new project:

```bash
ionic start SheetJSIonic blank --type angular --cordova --quiet --no-git --no-link --confirm
```

If a prompt asks to confirm Cordova use, enter `Yes` to continue.

If a prompt asks about creating an Ionic account, enter `N` to opt out.

2) Set up Cordova:

```bash
cd SheetJSIonic
ionic cordova plugin add cordova-plugin-file
ionic cordova platform add ios --confirm
ionic cordova platform add android --confirm
npm install --save @ionic-native/core @ionic-native/file @ionic/cordova-builders
```

:::note

If `cordova-plugin-file` is added before the platforms, installation may fail:

```
CordovaError: Could not load API for ios project
```

This can be resolved by removing and reinstalling the `ios` platform:

```bash
ionic cordova platform rm ios
ionic cordova platform add ios --confirm
```

:::

:::caution

If the `npm install` fails due to `rxjs` resolution, add the highlighted lines
to `package.json` to force a resolution:

```js title="package.json"
  "private": true,
  // highlight-start
  "overrides": {
    "rxjs": "~7.5.0"
  },
  // highlight-end
  "dependencies": {
```

After adding the lines, the `npm install` command will succeed.

:::

3) Install dependencies:

```bash
npm install --save https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz
```

4) Add `@ionic-native/file` to the module.  Differences highlighted below:

```ts title="src/app/app.module.ts"
import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';

// highlight-next-line
import { File } from '@ionic-native/file/ngx';

@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule, IonicModule.forRoot(), AppRoutingModule],

  // highlight-next-line
  providers: [File, { provide: RouteReuseStrategy, useClass: IonicRouteStrategy }],
  bootstrap: [AppComponent],
})
export class AppModule {}
```

5) Download [`home.page.ts`](pathname:///ionic/home.page.ts) and replace:

```bash
curl -o src/app/home/home.page.ts -L https://docs.sheetjs.com/ionic/home.page.ts
```

**iOS Testing**

```bash
ionic cordova emulate ios
```

:::caution

In some test runs, the `cordova build ios --emulator` step failed with error:

```
> cordova build ios --emulator
Could not load API for ios project
```

This was resolved by forcefully installing `cordova-ios`:

```bash
npm i --save cordova-ios
```

:::

**Android Testing**

```bash
ionic cordova emulate android
```

:::caution

In some test runs, `cordova build android --emulator` step failed with error:

```
Could not find or parse valid build output file
```

This was resolved by forcefully installing `cordova-android`:

```bash
npm i --save cordova-android
```

:::