Is there a way to navigate to a specific component selector within an ngFor loop?

Question

Is there a way to navigate to a specific component selector within an ngFor loop?

I have a scenario where I have multiple components running inside *ngFor on the same page. My goal is to create button links at the top of the page that, when clicked, will scroll to the corresponding component on the page.

Below are the code snippets that I am currently working with:

In the HTML file:

<button (click)="scroll(target)"></button>
<div #target>Your target</div>

And in the TypeScript file:

scroll(el: HTMLElement) {
    el.scrollIntoView();
}

However, I am unsure of how to reference each individual component's selector.

Here is a snippet of my code without implementing the above functionality yet:

// There will be many buttons to link to each of the components.

<button type="button" (click)="scroll()">Click this button to navigate</button>

<div *ngFor="let appdata of appData">
    <app-details [value]="appdata"></app-details>
</div>

The 'appdata' variable is a JSON object containing attributes like appID (which could be used to uniquely identify each component), title, description, etc.

Please provide guidance on how I can reference the components and possibly suggest an implementation strategy. Thank you!

angular typescript ngfor

Answer 1

Answer №1

You have the ability to create something along these lines.

<div *ngFor="let appdata of appData; let i = index;">
    <app-details [id]="i" [value]="appdata"></app-details>
</div>

Upon clicking the scroll button, you can implement TS code to focus on a specific area:

const element = document.querySelector(id); // id reference of the scroll target element
element.scrollIntoView();

Answer 2

You have the ability to create something along these lines.

<div *ngFor="let appdata of appData; let i = index;">
    <app-details [id]="i" [value]="appdata"></app-details>
</div>

Upon clicking the scroll button, you can implement TS code to focus on a specific area:

const element = document.querySelector(id); // id reference of the scroll target element
element.scrollIntoView();

Answer 3

Answer №2

If you want to scroll to a specific element on a webpage, JavaScript provides the window.scrollTo(xpos, ypos) function.

Here's how you can achieve this:

Firstly, create a variable that represents the window object.

win:Window = window;

Next, implement the scroll functionality:

scroll(component) {
    this.win.scrollTo(0, component.offsetTop);
}

The parameter 'component' should indicate the specific element you want to scroll to, and component.offsetTop gives you the vertical position of that element.

In your HTML code:

<span *ngFor="let target of win.document.getElementsByTagName('app-details'); let i=index" >
    <button (click)="scroll(target)">Go To {{i}}</button></span>

Answer 4

If you want to scroll to a specific element on a webpage, JavaScript provides the window.scrollTo(xpos, ypos) function.

Here's how you can achieve this:

Firstly, create a variable that represents the window object.

win:Window = window;

Next, implement the scroll functionality:

scroll(component) {
    this.win.scrollTo(0, component.offsetTop);
}

The parameter 'component' should indicate the specific element you want to scroll to, and component.offsetTop gives you the vertical position of that element.

In your HTML code:

<span *ngFor="let target of win.document.getElementsByTagName('app-details'); let i=index" >
    <button (click)="scroll(target)">Go To {{i}}</button></span>

Answer 5

Answer №3

In order to achieve my goal, I needed the list to scroll into view once it was constructed. This solution is based on @Abhishek's response and this particular answer.

<div *ngFor="let appdata of appData; let i = index;let isLast = last">
    <app-details [id]="'item' + i" [value]="appdata"></app-details>
    <span *ngIf="isLast">{{ scrollIntoView('item' + i) }} </span>
</div>

To implement this in your typescript file:

  scrollIntoView(id: string) {
    const element = document.getElementById(id);
    element?.scrollIntoView();
  }

Answer 6

In order to achieve my goal, I needed the list to scroll into view once it was constructed. This solution is based on @Abhishek's response and this particular answer.

<div *ngFor="let appdata of appData; let i = index;let isLast = last">
    <app-details [id]="'item' + i" [value]="appdata"></app-details>
    <span *ngIf="isLast">{{ scrollIntoView('item' + i) }} </span>
</div>

To implement this in your typescript file:

  scrollIntoView(id: string) {
    const element = document.getElementById(id);
    element?.scrollIntoView();
  }

Is there a way to navigate to a specific component selector within an ngFor loop?

Answer №1

Answer №2

Answer №3

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