How can we efficiently toggle the visibility of a div inside ngFor, as shown in the example below? Each click should toggle the visibility of a div from the same iteration. The main concern is how to properly bind this event/DOM.
<div *ngFor="let hero of heroes; let i = index">
<div [hidden]="?">Toggle my visibility</div>
<div (click)="?">Click me</div>
</div>
In my opinion, a great solution would be to establish a new array that holds visibility attributes for each hero. Therefore, we can create an array (where each hero is initially visible):
this.heroesVisibility = new Array(this.heroes.length).fill(true);
In the component class, we can implement the following function:
public toggleVisibility(id : number) : void {
this.heroesVisibility = !this.heroesVisibility;
}
Then, in the template:
<div *ngFor="let hero of heroes; let i = index">
<div [hidden]="!heroesVisibility[i]">Toggle my visibility</div>
<div (click)="toggleVisibility(i)">Click me</div>
</div>
Utilize *ngIf directive in Angular by creating a boolean variable that toggles on click event.
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