<ion-header>
<ion-toolbar>
<ion-title>nativeplugin</ion-title>
</ion-toolbar>
</ion-header>
<ion-content padding>
<ion-button (click)="openflash()">
open flash light
</ion-button>
</ion-content>
<ion-button shape="round" color="primary"
fill="outline" href="/nativeplugin">
go to native plugin</ion-button>