"Discover the steps to expand an accordion panel with a button click in an Angular application

I have a unique custom accordion setup where I am trying to figure out how to expand the second panel when clicking on a button within the first panel. Here is the code snippet:

 <app-accordion [multi]="true">
   <app-expansion-panel id="panel1" [expanded]="true">
    <button (click)="continue()">Continue</button>
  </app-expansion-panel>
  <app-expansion-panel id="panel2">second panel</app-expansion-panel>
 </app-accordion>

I am looking for a solution to achieve this functionality using Angular, specifically when clicking on the 'Continue' button. Any suggestions are appreciated.

javascriptangulartypescript

Answer №1

To optimize performance, it is suggested to implement a 

ngFor="let accordion of accordionList; let i = index"

A variable in the component.ts file should be used to store the active accordion panel index (activeIndex), and apply 

[expanded]="i === activeIndex"

When using (click)="continue()", make sure to include the index like so: (click)="continue(i)"

In the continue method, simply update the index of the accordion that needs to be expanded based on the received current index. You can use something along the lines of

continue(index) { this.activeIndex = index + 1}

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