> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rebellapp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# my.getAppIdSync

> Get the Mini Program App ID synchronously.

Use this API to obtain the Mini Program App ID synchronously without requiring callbacks or promises.

## Return Value

| Property | Type   | Description                                |
| -------- | ------ | ------------------------------------------ |
| appId    | String | The identifier of the current Mini Program |

<Info>
  The returned App ID depends on the deployment context:

  * **Deployed to AlipayCN**: Returns the ID assigned by AlipayCN
  * **Other deployments**: Returns the ID assigned by Mini Program Platform
</Info>

## Code Example

```javascript theme={null}
// Get App ID synchronously
const result = my.getAppIdSync();
console.log('App ID:', result.appId);

// Use in page
Page({
  onLoad() {
    const { appId } = my.getAppIdSync();
    this.setData({ appId });
  },

  data: {
    appId: ''
  }
});
```

## Use Cases

### Conditional Logic Based on App ID

```javascript theme={null}
Page({
  onLoad() {
    const { appId } = my.getAppIdSync();

    // Different behavior for different app versions
    if (appId === 'your-production-app-id') {
      this.initProductionFeatures();
    } else {
      this.initDevelopmentFeatures();
    }
  }
});
```

### Logging and Analytics

```javascript theme={null}
function logEvent(eventName, data) {
  const { appId } = my.getAppIdSync();

  my.request({
    url: 'https://analytics.example.com/log',
    method: 'POST',
    data: {
      appId,
      event: eventName,
      ...data
    }
  });
}
```

## Notes

* This is a synchronous operation that returns immediately
* The App ID is stable and does not change during the Mini Program lifecycle
* For AlipayCN deployments, cross-reference with the Mini Program Platform to find the official Mini Program ID

## Related APIs

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  </Card>

  <Card title="my.SDKVersion" icon="tag" href="/jsapi/basic/my.SDKVersion">
    Get SDK version
  </Card>
</CardGroup>