What is a practice for utilizing navCtrl.push() with a variable storing a class name?

Currently, I am utilizing Visual Studio Code for Ionic 3 development with AngularJS/Typescript. In my code, I am using this.navCtrl.push() to navigate to different pages within the application. Specifically, I have two classes/pages named "level1" and "level2" that I need to dynamically navigate to.

this.navCtrl.push(level2)

When directly specifying the class/page name like above, everything works smoothly. However, when attempting to use a variable:

levelNbr: any;

if(value == null)
{
   this.levelNbr = "level1"
}
else
{
   this.levelNbr = "level2"
}

this.navCtrl.push(this.levelNbr)

An error is encountered stating:

Uncaught (in promise): invalid link: level2

This suggests that although it identifies "level2", it fails to open the respective page. Is there a way to successfully navigate to a page by using a variable?

Thank you

The following code snippets were used:

import { level1 } from './../levels/levels';
import { level2 } from './../levels/levels';
//all classes are in one file called levels

In the app.modules.ts file, they are also declared.

Answer №1

When loading new components or pages, the process is similar to using "lazy loading" for those components. However, if you are encountering an invalid link error, it means lazy loading is not being utilized in this case.

To resolve this issue, ensure that relevant components are imported into the Component you are working from and assign them accordingly:

import { Level1Component } from '../whatever";
import { Level2Coomponent } from '../whatever2";

...
if(value == null)
{
   this.levelNbr = Level1Component
}
else
{
   this.levelNbr = Level2Component
}

this.navCtrl.push(this.levelNbr)

Make sure that these imported Components (levels) are correctly declared in your app's overall module (app.module.ts)

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

Routing in AngularJS with $routeProvider

Whenever I reload my page after using angular js routing with $routeProvider, I encounter an error message stating "Cannot GET /home". Here is the code snippet that I am working with: .when("/", { templateUrl: "views/login/login.html", controller: "Lo ...

Issue with React.js code not being detected in TSX file (Visual Studio 2015 Update 1 RC)

Currently, I am utilizing Visual Studio 2015 with update 1 release candidate. Interestingly, I have managed to successfully incorporate React.js code and syntax highlighting within a .JSX file. However, when it comes to a .TSX file, nothing seems to be wor ...

Guide to incorporating external code in InversifyJS without direct control

I'm wondering if it's feasible to add classes that are not editable. Inversify seems to rely heavily on annotations and decorators, but I'm curious if there is an alternative method. ...

Using the Typescript type 'never' for object fields: a guide to implementing it

I'm attempting to make this specific example function similar to this one: interface Foo { a: number; b: string; c: boolean; } type Explode<T> = keyof T extends infer K ? K extends unknown ? { [I in keyof T]: I extends K ? T ...

TS2307 error encountered in Angular 2 TypeScript due to the inability to locate a module for a private npm

I've been working on creating some components for internal company use, with the intention of sharing them through our private npm repository. However, I've hit a roadblock while trying to add these components to an app using npm and systemjs - I ...

Implementing child components rendering in a React application using TypeScript

Just a little background information: I am attempting to build a carousel with pagination using ReactJS. Here is the code snippet I currently have: interface HTMLCarouselT { children: Array<JSX.Element> size: number; } const HTMLCarousel = ({ch ...

Issue encountered while trying to determine the Angular version due to errors in the development packages

My ng command is displaying the following version details: Angular CLI: 10.2.0 Node: 12.16.3 OS: win32 x64 Angular: <error> ... animations, cdk, common, compiler, compiler-cli, core, forms ... language-service, material, platform-browser ... platfor ...

Understanding the Functions of Angular Providers and Implementing Them

Just starting out with Angular and following a tutorial from this video. I decided to experiment by adding providers :[EmployeeService] to both employee-list.component.ts and empployee.component.ts within the @component section. However, this led to an err ...

bundle.js encountered a TypeError when attempting to read a property that was undefined, specifically while trying to access the PriceIndexationDataControlStandard

In the midst of developing a React component using the Microsoft PCF Framework, I encountered a perplexing error seemingly out of the blue. While making changes in TypeScript without even executing any build commands, the rendering of my component suddenly ...

Exploring the features of NextJS version 13 with the benefits

Starting from the 13th step, SSR is utilized by default and in order to opt for client side rendering you must specify it at the top like so: 'use client' Currently, my setup involves TypeScript and styled-component integration. Take a look at ...

Preserve the previous condition - Angular UI-Router

This is a code snippet from a tutorial on UI router. I have a specific question related to it. I am trying to figure out how to retain the previous state for viewB in the code provided below. Essentially, when selecting the route1 state, I would like view ...

Invoke a static method from within a class in Typescript (Angular HttpInterceptor)

Recently, I've been working on an http interceptor that was functioning smoothly until just yesterday. It consists of static methods, and for some reason, one of them is now causing issues. Here is the error message displayed in the console: my.c ...

The Angular2 view is failing to display updated data from a shared service

I've been struggling to show data from my shared service, but it's not displaying. Can someone please help me out? I've been stuck on this for the past few days. I've tried NgZone and ChangeDetectorRef, but they haven't worked for ...

Tips for navigating the material ui Expanded attribute within the Expansion Panel

After looking at the image provided through this link: https://i.stack.imgur.com/kvELU.png I was faced with the task of making the expansion panel, specifically when it is active, take up 100% of its current Div space. While setting height: 100% did achi ...

"An error occurs when attempting to access "this" in a static method as it

Just diving into the world of React and Typescript and currently exploring React hooks. Encountered a problem that's leaving me scratching my head. Here's the hook I'm using to fetch data: export const useFetch = <T>( fetchFunc: ( ...

The @Input() property within an Angular component is producing an empty array as its result

I have a calendar component that has a data property marked as @Input(): import { Component, OnInit, Input, OnChanges, SimpleChanges } from '@angular/core'; @Component({ selector: 'app-calendar', templateUrl: './calendar.comp ...

Looping through children components in a LitElement template

I aim to generate <slot>s for each child element. For instance, I have a menu and I intend to place each child inside a <div> with a item class. To achieve this, I have devised a small utility function for mapping the children: export functio ...

The Azure GraphQL serverless function encountering an issue with the Cosmos DB connection, displaying an

After developing a serverless GraphQL API function using Azure functions and connecting it to Cosmos DB, I have encountered an issue with "Invalid URL" that has been puzzling me for a week. Despite running the graphql function locally without any problems, ...

Using Angular and C#, learn how to efficiently incorporate functionality for saving lists, including the addition, removal, and saving of items

I am working on an application that involves managing a list of objects within a web view. Upon loading the page, an AJAX request is triggered to an ASP MVC controller. The controller utilizes Entity Framework to retrieve the list of objects from a SQL se ...

What is the best way to verify the input of a TextField element?

When I visited the Material UI Components documentation for TextField, I was hoping to find an example of validation in action. Unfortunately, all they showed was the appearance of the invalid TextField without any insight into the actual validation code i ...