ionic3

I was using simple ion-list with ngFor to display items in a list in ionic 3 & was working fine. Then I used virtual scroll with ion-list & now I am getting following error: Uncaught TypeError: Cannot set property 'length' of null at VirtualScroll.readUpdate Code snippet: <ion-list [virtualScroll]="anArray" approxItemHeight="50px"> <div *virtualItem="let arrayItem"> //other code Array declaration: public anArray: any[]; In constructor: this.anArray = []; After network response: this.anArray = data.result; 来源： https://stackoverflow.com/questions/45750977/uncaught-typeerror-cannot-set-property

What is the correct way of defining a model in Ionic 3 with getters and setters? I followed this. export class ItemModel{ private _name: string; constructor(private n: string){ this._name = n; } get name(): string { return this._name; } set name(name: string) { this._name = name; } } Is it correct? In some forums it was mentioned about a need to keep the code very short. So does that mean using getters and setters would affect the performance somehow? Typescript supports accessors natively , which effectively handle the job of getters and setters. You don't need to manually define them as

I need a thousand separator input mask directive or else with Ionic 3 app. I have tried 2 directives. But none of them were working. Do you know working directive for that? e.g. 50,000 .html <ion-input type="tel" [ngModel]="data?.budget" formControlName="budget" (ngModelChange)="data.budget=$event"></ion-input> I have logged issues on Git. please see that too: text-mask Issue ng2-currency-mask Issue Here is my version of formatting that works on ionic too. Typescript: format(valString) { if (!valString) { return ''; } let val = valString.toString(); const parts = this.unFormat(val).split(this

I have several arrays of objects in my typescript file. I want to iterate through these arrays simultaneously and display their contents in the html file. Here is the content: <ion-item> {{array1[i]}} {{array2[i]}} {{array3[i]}} </ion-item> Luckily the arrays are always the same size. Now I want to do a for-loop after the ion-item (something like this): <ion-item *ngFor="let i in array1"> {{array1[i]}} {{array2[i]}} {{array3[i]}} </ion-item> But doing it this way gives me an error: "Can't bind 'ngForIn' since it isn't a known property of 'ion-item'. Now I've found the following workaround, but

I am trying to use Appsee or UXcam I tried import like below, but no luck // import { Appsee } from '@ionic-native/appsee'; Else where i saw that you have to declare the variable in question for typescript to recognize the variable, I did that like below declare var cordova:any; // import { Appsee } from '@ionic-native/appsee'; declare var cordova:any; @Component({ templateUrl: 'app.html' }) export class MyApp { rootPage:any = LoginPage; // FOR TESTING constructor(platform: Platform, statusBar: StatusBar, splashScreen: SplashScreen) { platform.ready().then(() => { cordova.plugins.Appsee.start(

i am using FCM in ionic 3. I am getting notification properly when the app is in foreground. When I receive a notification in background i am getting the data in the notification only after tapping the notification. But i want to get the data without tapping on the notification. For example see the below code. this.fcm.onNotification().subscribe(data => { if(data.wasTapped){ console.log("Received in background"); } else { console.log("Received in foreground"); }; }); Here i am getting data if data.wasTrapped is true else in the foreground. My problem is to get data without tapping the