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Onesignal Push Notifications With Firebase step by step in ionic 4

To integrate OneSignal with Firebase for sending push notifications to an Ionic 4 mobile app, you will need to follow these detailed steps: 1. Create an account on OneSignal and create a new app to get your App ID and REST API Key. 2. Create a new project in Firebase and enable Cloud Messaging. This will provide you with a Server Key and Sender ID, which will be needed for OneSignal configuration. 3. In OneSignal, go to the Settings -> App Settings and configure the Firebase Cloud Messaging (FCM) settings by adding the Server Key and Sender ID from Firebase. 4. In your Ionic 4 project, install the OneSignal plugin by running the following command:      ionic cordova plugin add      onesignal-cordova-plugin     npm install @ionic-native/onesignal 5. In the app.module.ts file, import the OneSignal module and add it to the providers array: 6. In the app.component.ts file, import the OneSignal module, and in the constructor, initialize the OneSignal plugin with your App ID and REST API
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Js and CSS CDN For Jcrop

JS and CSS CDN for Image cropping : <script type="text/javascript" src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-jcrop/0.9.15/js/jquery.Jcrop.js"></script> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jquery-jcrop/0.9.15/css/jquery.Jcrop.css"/>   <link rel="stylesheet" href="https://unpkg.com/jcrop/dist/jcrop.css"

Set ANDROID_HOME and Path Variables

  Set ANDROID_HOME and Path Variables for android studio SDK 1. Right-click on 'My Computer'/'This PC' and select Properties. Go to Advanced system settings and select ‘Environmental Variables’ option.  2. Under the User Variable table, click New to open New User Variable dialog.  3. Put ANDROID_HOME as Variable name and provide the path of the SDK folder next to Variable value.  4. Click OK to close the dialog box  5. Go to the folder where SDK has been installed.  6. Inside the SDK folder look for ‘tools’ and ‘platform-tools’ folder.  7. Copy the path for both tools and platform-tools.  8. Open ‘Environmental Variables’ dialog box.  9. Go to System Variables table and locate the Path variable.  10. Edit the path variable from ‘Edit system Variables’ dialog box.  11. Add the ‘tools’ and platform-tools’ folder’s full path.  12. Close the entire opened dialog box.  13. This configures the Android. However, to check open the command prompt.  14. Type the command ‘android’