Function did not get triggered by Firebase AuthStateListener

Greetings! In my Nativescript Angular application, I am verifying at the beginning of the app whether the user is logged in or not and then calling a function based on that. Here's the code snippet:

ngOnInit() {
    firebase.init({
        onAuthStateChanged: function (data) {
            if (data.loggedIn) {
                this.navigateToHome();
            }
        },
    })

Error Message:

The Firebase AuthStateListener failed to trigger the function (data) {
    if (data.loggedIn) {
        this.navigateToHome();
        ...<omitted>... } TypeError: Cannot read property 'navigateToHome' of undefined

angulartypescriptfirebasefirebase-authentication

Answer №1

Switching to an arrow function resolved the problem.

ngOnInit() {
    firebase.init({
        onAuthStateChanged: (data) => {
            if (data.loggedIn) {
                this.openHome();
            }
        },
    })

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

having difficulty deactivating matInput within angular form

I am facing an issue with a form where I need to disable one of the inputs based on a certain condition. <mat-form-field> <input matInput formControlName="domain" [disabled]="!is_staff && recipients[selectedIndex].verified"> </m ...

angular

What is the process of overriding a method from an abstract class that employs generics for typing?

In my quest to develop an abstract class with an abstract static method, I find myself wanting to override this method in a concrete class. The static nature of the method stems from its responsibility to create a 'copy' from a database model and ...

typescriptgenericsabstract-class

What is the best way to verify that all elements within an object are 'false' except for one that is 'true'?

I am working with an object that has multiple boolean fields: type SomeObject = { A: boolean B: boolean C: boolean .... } Is there a simple and efficient method to determine if all other fields (except for a specified one) are set to false? We co ...

typescripttype-narrowing

Exploring the concept of object destructuring in Typescript with imports

Currently, I am in the process of developing the type system for @masala/parser. This allows me to customize the index.d.ts file to fit my needs. When using this as a user, I can: import masala from '@masala/parser' let {C, Stream, F} = masala; ...

typescripttypescript-typingstypescript2.0

The subscriber is consistently failing to return the correct value after execution, always reverting back to the default value of

I am encountering an issue with the prefillLoginId function where the value returned is always false, even though each code inside the subscription is executed. Can anyone assist me in resolving this and returning a true value? private prefillLoginId(cur ...

angularangular-ui-routerngrx-storengrx-store-4.0angular-ngrx-data

Angular 8 hybrid application fails to detect AngularJS components

I recently embarked on developing a hybrid application and took the following steps: Added Angular 8 dependencies Inserted polyfills.ts Removed the ng-app attribute from my root index.html Manually bootstrapped the AngularJs app This is how my Angular i ...

angularjsangularangular-upgradeangular-hybrid

Enable a fraction of a category

Imagine having a structure like this interface User { name: string; email: string; } along with a function like this updateUser(user: User) { } As currently defined, updateUser cannot accept only a name (updateUser({name: 'Anna'} would fa ...

typescript

Could a template variable be established for the p-dropdown element in template-driven form validation?

In the template, I have a p-dropdown element <p-dropdown id="output-method" [options]="outputMethods" [(ngModel)]="transformer!.outputMethod" pTooltip="Output Method" tooltipPosition="bottom&quo ...

angularprimeng

Encountering a Schema error when using Components in an Angular 7 Element

I have been working on integrating various external libraries into my custom component to use in a dashboard project I'm developing. To simplify the process, I decided to create an Angular Element that includes a Line Chart, Graphic Gauge, and additio ...

angulartypescriptngx-chartsangular-elements

"Exploring the power of Angular 16 coupled with Firebase 9 for seamless file

Recently, I've been facing some challenges with my Angular 16 app that uses Firebase 9 and angular/fire 7. Specifically, I've been struggling to implement a simple file upload feature to Firebase storage. Despite spending the last couple of days ...

angulartypescriptfirebaseangularfire2

Defining the signature of an unnamed function in TypeScript

Within my Express code, I have an anonymous function set up like this: app.use((err, req, res, next) => { // ... }); I am looking to specify the type of the function as ErrorRequestHandler (not the return type). One way to achieve this is by defining ...

javascriptnode.jstypescriptexpress

Nestjs opts to handle invalid routes by throwing a NotFoundException rather than a MethodNotAllowed

I've recently developed a Rest API using NestJS and now I'm focusing on customizing error responses. Specifically, I want to address the scenario where a user calls an endpoint with the incorrect HTTP method. Take for instance the endpoint GET / ...

node.jstypescriptrestnestjs

Reviving dates with Angular 11's Ngxs-Storage-Plugin

Currently, I'm in the process of switching from NgRx to NGXS within my Angular project. I am curious to know if there is a built-in way to preserve dates using the Ngxs-Storage-Plugin, similar to how the library ngrx-store-localstorage handles it for ...

angularngxs

problems encountered when testing azure containerclient.listblobsbyhierarchy using sinon

I have developed a REST endpoint with the code "/files/lookup", which is designed to receive a query parameter folderPath and return a list of files with details, excluding content but including metadata. The endpoint connects to Azure Blob Stora ...

node.jstypescriptsinon

Strategies for Handling Errors within Observable Subscriptions in Angular

While working with code from themes written in the latest Angular versions and doing research online, I've noticed that many developers neglect error handling when it comes to subscription. My question is: When is it necessary to handle errors in an ...

javascriptangulartypescripterror-handling

Issue with PrimeNG Calendar not updating date value within modal

While using the PrimeNG Calendar control, I encountered an issue. Even though I am able to select and store dates, when I try to fetch dates from a database and update the Modal, I receive the following error message: https://i.sstatic.net/LWSUF.png <p ...

javascriptangularangular5primeng

The Core.js file seems to be missing, but it can be found in the node modules directory. The Meteor client is functioning properly, but there seems to be

I encountered an issue while trying to import the meteor-client.js file. The problem arose when loading ecmascript-runtime-client, which prompted me with an error stating that the core-js npm package could not be found in my node_modules directory. Even af ...

angularionic-frameworkmeteornpm

Error Detected: An unhandled error occurred, triggering a promise rejection: TypeError: The super expression must be either null or a function in Angular version 6

Upon deploying the application on AWS Elastic Beanstalk, an error has surfaced. While the build and deployment processes were successful, one module is giving a Super Expression error. The other modules are functioning correctly, and everything works fine ...

angulartypescripterror-handlingruntime-erroramazon-elastic-beanstalk

Guide on showcasing the parameter passed in a TypeScript file on an HTML page

Just starting out with the Ionic framework and I'm attempting to show the parameter passed from the home page on my new page. I've gone through the code below but so far, nothing is showing up. Any ideas on what might be missing? Thanks in advan ...

angulartypescriptionic2

Verifying the accuracy of a React Component in interpreting and displaying a path parameter

I have the following React/Typescript component that is functioning correctly. However, I am struggling to write a test using testing-library. My goal is to verify that it properly receives the level parameter and displays it on the page: import React from ...

reactjstypescript