Enhance constructor functionality in Ionic 4 by incorporating additional parameters

Question

Enhance constructor functionality in Ionic 4 by incorporating additional parameters

Recently, I started using Ionic and came across a location page. In the location/location.page.ts file, there was an automatically generated empty constructor like this:

constructor() { }

Initially, the page functioned properly with this setup. However, as soon as I added parameters to the constructor, the page refused to load.

constructor(private httpProvider: HttpProvider, public geolocation: Geolocation) { }

I'm curious if there is anything else I need to do when adding parameters to the constructor. This is part of an Ionic 4 project and I also made sure to update the appmodule.ts file accordingly. Is there something crucial that I might be overlooking?

https://i.stack.imgur.com/Vfi95.png

https://i.stack.imgur.com/FcOnk.png

Thank you.

typescript ionic-framework constructor ionic4

Answer 1

Answer №1

To properly set up the functionality in your app.modules.ts file, make sure to include the HttpModule by adding the following line of code:

import { HttpModule } from '@angular/http';

Next, you'll want to include it in your imports section like so:

imports: [ 
    /// 
    HttpModule,
    ///
   ]

Additionally, within the same file, make sure to declare your Geolocation provider with the following import statement:

import { Geolocation } from '@ionic-native/geolocation';

Don't forget to add Geolocation to the providers array this time.

In your LocationPage, ensure that your constructor is structured as follows:

constructor(private http: Http, private location: Geolocation){
   ///
}

Assuming you have already installed the necessary npm packages mentioned here.

Answer 2

To properly set up the functionality in your app.modules.ts file, make sure to include the HttpModule by adding the following line of code:

import { HttpModule } from '@angular/http';

Next, you'll want to include it in your imports section like so:

imports: [ 
    /// 
    HttpModule,
    ///
   ]

Additionally, within the same file, make sure to declare your Geolocation provider with the following import statement:

import { Geolocation } from '@ionic-native/geolocation';

Don't forget to add Geolocation to the providers array this time.

In your LocationPage, ensure that your constructor is structured as follows:

constructor(private http: Http, private location: Geolocation){
   ///
}

Assuming you have already installed the necessary npm packages mentioned here.

Answer 3

Answer №2

Furthermore, when utilizing various services

implement the following code snippet in your services:

@Injectable(
    { providedIn: 'root' }
)

Answer 4

Furthermore, when utilizing various services

implement the following code snippet in your services:

@Injectable(
    { providedIn: 'root' }
)

Enhance constructor functionality in Ionic 4 by incorporating additional parameters

Answer №1

Answer №2

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