How to detect platform using Ionic 4

For me it’s still showing android platform while detecting in desktop.

Below is my ionic info :

Ionic:
ionic (Ionic CLI) : 4.1.1 (C:\Users\test\AppData\Roaming\npm\node_modules\ionic)
Ionic Framework : @ionic/angular 4.0.0-beta.1
@angular-devkit/core : 0.7.2
@angular-devkit/schematics : 0.7.2
@angular/cli : 6.1.2
@ionic/ng-toolkit : 1.0.5
@ionic/schematics-angular : 1.0.4

Cordova:

cordova (Cordova CLI) : 8.0.0
Cordova Platforms : android 6.2.3
Cordova Plugins : cordova-plugin-ionic-keyboard 2.0.5, cordova-plugin-ionic-webview 2.0.0, (and 4 other plugins)

System:

Android SDK Tools : 26.1.1 (C:\Users\test\AppData\Local\Android\sdk)
NodeJS : v8.11.3 (C:\Program Files\nodejs\node.exe)
npm : 5.6.0
OS : Windows 10