Switching class on a specific element in Angular 2

My element list appears like this:

 <ul *ngFor="let period of periodsDate">
        <li                         
        [class.show]="isShown" (click)="toggleClass()">
        <a>{{ period.id }} </a>
        </li>
</ul>

To add or remove the 'show' class, I utilize the following method:

toggleClass() {
        this.isShown = !this.isShown;
    }

The issue at hand is that when clicking on any <li> element, the 'show' class is added to all elements. I aim to only have the 'show' class added to the specific <li> that was clicked.

Answer №1

Utilize the object period without creating a new object. See the code snippet below for reference:

<ul *ngFor="let period of periodsDate">
    <li class="dropdown__nested" [class.show]="period.isShown" (click)="toggleClass(period)">
        <a>{{ period.key }}</a>
    </li>
</ul>

Typescript function:

toggleClass(period) {
    period.isShown = !period.isShown;
}

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