What is the most effective approach in Angular 2 to specify multiple components on a single path while preserving data with TypeScript?

export const routes: Routes  = [
{path: '', redirectTo: 'login', pathMatch: 'full'},
{ path: 'login',component: LoginComponent },

{path: 'main', component: MainComponent ,},

{ path: 'Dashboard',component: DashboardComponent,
    children: [
        {
            path: ':id',
            children: [
                { path: '',redirectTo: 'Registration', pathMatch: 'full'},
                {
                    path: 'Registration',
                    component: RegistrationComponent,
                },
                {
                    path: 'Contact',
                    component: ContactComponent
                },
            ]
        }
    ]
},];

Struggling to maintain input fields data in contact and registration components? Learn how to avoid losing data when navigating between child components.

DashBoard Component - Registration:

@Component({
selector: 'Registration',
template: `<input type="text" required>`,})
 export class RegistrationComponent{
constructor(public router: Router) {}}

DashBoard Component - Contact:

@Component({
selector: 'Contact',
template: `<input type="text" required>`,})
 export class ContactComponent{
constructor(public router: Router) {}}
 <div>
   <a class="Registratin"  [routerLink]="[':/registaration']" routerLinkActive="active">
                 </a>
   <a class="Contact"  [routerLink]="[':/contact']">
                 </a>
   </div>
<div  class="outer-outlet">
      <router-outlet></router-outlet>
    </div>

Answer №1

When transitioning from the RegistrationComponent to the ContactComponent, Angular first destroys the current component (i.e. RegistrationComponent) and then loads the new ContactComponent. This process is what causes the loss of input data in the registration template.

There are several approaches to resolving this issue:

1. Utilize structural directives or [hidden]
Instead of using routing, consider utilizing ngIf to hide/show components based on certain conditions. For example:

<Registration [hidden]="id!=1"></Registration>
<Contact [hidden]="id!=2"></Contact>

2. Use Service(s) for data communication
a. Inject a service with providers to set/get data
b. Utilize Resolve Guard to prefetch data before navigating

For further exploration, refer to the official Angular 2 routing examples that showcase different routing behaviors.

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

If a component does not have a specified return type annotation, it will default to an 'any' return type

I'm struggling to understand the typescript error that keeps popping up, it says: 'MyGoogleLogin', which doesn't have a return-type annotation, is being given an implicit 'any' return type. All I want is for the component t ...

Exploring Angular 4: Performing tests on a component containing another component

I am currently conducting testing on my Angular application: ng test Below is the content of my html file (page-not-found.component.html): <menu></menu> <div> <h4> ERROR 404 - PAGE NOT FOUND </h4> </div> Afte ...

Customize specific styles for individual divs one at a time (without the use of jQuery)

Can you assist me with this issue? I am trying to display the <span class="badge badge-light"><i class="fa fa-check-circle"></i></span> tag (initially set to "visibility: hidden") when clicking on a div with the class "role-box". He ...

Troubleshooting the Issue with Conditional Rendering in Nextjs & TypeScript

Struggling with rendering a component conditionally. I have a drawHelper variable and a function to toggle it between true and false. The component should render or not based on the initial value of drawHelper (false means it doesn't render, true mean ...

In order to utilize Node.js/Express/Typescript, it is necessary to use the

My current project involves creating a webservice using Express, with the goal of making it executable from both localhost and an AWS Lambda function via Claudia. In order to achieve this, I am aiming to separate the app configuration from the app.listen ...

Using Angular 8 for Filtering Firebase Data

I need to implement a filter on the titles of my stored data, but I am facing an issue where the structure of the filtered data changes. The original "key" of the data gets deleted by the filter and is replaced with an index instead. Link to repository : ...

Can a blob file be transformed into base64Data using Javascript specifically in Ionic and Angular frameworks?

https://i.stack.imgur.com/3aMyx.png[ async FileZip() { const code = await fetch("./assets/input.txt") var blob = await downloadZip([code]).blob() console.log(blob); function blobToBase64(blob: Blob): Observable<string> { r ...

Error message: While running in JEST, the airtable code encountered a TypeError stating that it cannot read the 'bind' property of an

Encountered an error while running my Jest tests where there was an issue with importing Airtable TypeError: Cannot read property 'bind' of undefined > 1 | import AirtableAPI from 'airtable' | ^ at Object.&l ...

Resetting clears the date default value

When the page is loaded, the date input field is automatically set to the current date. However, if the form is reset, instead of restoring the default date, the date field is cleared, as shown in the images below: Page load Form reset // app.component. ...

The error "Failed to log in. Cannot read property getPackageManager of undefined in Angular 2

Recently, I came across the nativescript-appList Plugin, but unfortunately encountered a runtime error stating "Cannot read property getPackageManager of undefined." My code implementation within the constructor of an Angular2-NativeScript project is as f ...

Building basic objects in TypeScript

My current project involves utilizing an interface for vehicles. export interface Vehicle { IdNumber: number; isNew: boolean; contact: { firstName: string; lastName: string; cellPhoneNumber: number; ...

How to extract Response body as either plain text or XML in an AngularJS 2 HTTP GET call

I have a challenge with making a get request to the server that returns XML: let responseText = ""; this.http.get('http://example.com', {headers : headers}) .map((res:Response) => res.text()).subscribe(data => responseText = data); H ...

What is the best way to assign JSON values to my class property?

I've been working on a weather application that showcases the current weather of 5 different cities. By clicking on each city, users can access a detailed view displaying the 5-day forecast for that particular location. Currently, I have defined a we ...

A guide to retrieving data from a service in an Angular component

Hello, I am new to Angular and seeking help with my angular service and component. Specifically, I have a Register component and a Country service. My goal is to retrieve all countries from an API and display them in a form while also making this country ...

The element is implicitly declared as having an 'any' type due to the fact that an expression of type 'any' cannot be utilized to index type '{}'

I have a variable initialized with properties like this: const decoded = JSON.parse(nk.binaryToString(message.data)); const matchStateChanges = { humans: {}, ball: {}, } const { name } = decoded // for example, a string like "Player1" matchStateChang ...

What methods can be used to obtain download statistics for an Angular2 npm package?

Currently working on a presentation for an upcoming conference and faced with a bit of confusion... I'm having trouble locating the download statistics for the angular2 npm package! I've been looking here but unfortunately, there doesn't se ...

"Utilizing variadic tuple types to implement the pipe function in TypeScript 4: A step-by-step guide

An illustration from the release notes of TypeScript 4 demonstrates the use of variadic tuple types to eliminate multiple overload definitions. It seems feasible to type the pipe function for any number of arguments. type F<P, R> = (p: P) => R ty ...

How to bring in an interface in Angular 2

For my Meteor app using Angular 2, I am looking to create a custom data type like the one below: interface MyCustomType { index: number; value: string; } To use this custom type across multiple files, I attempted to create a separate file named "mycu ...

Angular 4 - The bindings are restricted from having assignments within them

Looking to include a CSS selector as an @Input in my component. To achieve this, I need to use the following syntax for passing a css selector: <mds-datetime-picker [inLine]="true" [targetSelector]='[data-name="target"]'></mds-datet ...

Retrieve user details from a NextJS application following a successful Keycloak authentication on a Kubernetes cluster

I've been attempting to retrieve the authenticated user information in my NextJS app after being redirected to it following a successful Keycloak login on a different tab located at localhost:8080/auth. The ingress (entry point) is responsible for ch ...