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26 changes: 26 additions & 0 deletions docs/ff-concepts/adding-customization/custom-functions.md
Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,32 @@ function code. Instead, you can pass the app state variable as a parameter and t

</details>

<details>
<summary>How do I convert a string to a double in FlutterFlow using a custom function?</summary>

If you need to convert a string (for example, `"123.45"`) into a `double` in FlutterFlow, you can do this with a Custom Function.

Below is a simple Dart example:

```dart
double stringToDouble(String value) {
return double.tryParse(value) ?? 0.0;
}
```
Steps to use in FlutterFlow:

- Go to Custom Functions in the left panel.
- Click + Add Function.
- Name the function (e.g., stringToDouble).
- Add a String parameter (e.g., value).
- Paste the code above.
- Save and use the function anywhere in your app (such as in a binding or conditional logic).

:::tip
- You don’t always need to write your own function — FlutterFlow’s **[Utility Functions Library](https://marketplace.flutterflow.io/item/ZVBmWMGpXe6vqnASRHDA)** already contains a stringToDouble method (and many others) that can save you time.
- You can install it from the Marketplace and use it immediately without creating custom code.
:::
</details>

## Utility Functions Library
Instead of building everything from scratch, explore our **[Utility Functions Library](https://marketplace.flutterflow.io/item/ZVBmWMGpXe6vqnASRHDA)** — packed with 50+ helpful functions for everyday tasks like formatting text, manipulating dates, validating input, and more. Easily plug them into your custom logic to save time and reduce errors.
38 changes: 37 additions & 1 deletion docs/ff-concepts/notifications/push-notifications.md
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Expand Up @@ -282,4 +282,40 @@ Also, ensure that these principals (emails) and their roles are present in the p

Below is a sample image for App Engine Default service account.
![pn-faq-img-2](imgs/pn-faq-img-2.png)
</details>
</details>

<details>
<summary>How do I test push notifications locally in FlutterFlow?</summary>

Push notifications cannot be fully tested in a browser or most emulators — they require a real device with proper push notification service configuration.

**To Test lLcally:**

1. **Use a Physical Device**
- Connect an Android or iOS device via USB or Wi-Fi.
- Notifications do not work reliably in Flutter web builds or most simulators.

2. **Set Up Your Push Notification Service**
- **For Firebase Cloud Messaging (FCM):**
- Add your Android package name and/or iOS bundle ID in Firebase Console.
- Download `google-services.json` (Android) or `GoogleService-Info.plist` (iOS) and add it to your project.
- **For OneSignal:**
- Create an app in OneSignal Dashboard.
- Configure the app ID and platform keys in FlutterFlow.

3. **Run the App Locally**
- Use FlutterFlow **Run Mode** or `flutter run` after exporting code.
- Ensure push notification permissions are requested on launch.

4. **Send a Test Notification**
- **Firebase Console:** Go to **Cloud Messaging** → **Send message** → target your device.
- **OneSignal Dashboard:** Go to **Messages** → **New Push**.

5. **Grant Notification Permissions on Device**
- iOS will prompt the first time; make sure to allow.
- Android 13+ will also prompt for permission.

:::tip
Keep your device connected and reuse the same build for repeated tests to avoid re-granting permissions each time.
:::
</details>