angular2 toggle icons inside ngFor
10,584
If I understand you right you can have just one <i>
on the page instead of having two:
template:
<div *ngFor="let day of daysInAWeek; let i = index">
<div>{{day}}</div>
<div>
<i class="fa" [ngClass]="toggle[i] ? 'fa-plus': 'fa-minus'" aria-hidden="true"></i>
</div>
<div class="details">Today is {{day}}</div>
<button (click)="toggle[i] = !toggle[i]">Toggle</button>
</div>
ts:
daysInAWeek: string[] = ['Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su'];
toggle = {};
So you can toggle just toggle classes on that element to be fa-plus
or fa-minus
You can put (click)="toggle[i] = !toggle[i]
on any html element inside your *ngFor
temlpate so it will trigger the toggle on click for related <i>
element.
Author by
Pratap A.K
Updated on July 08, 2022Comments
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Pratap A.K almost 2 years
Can some one please let me know how to toggle icons while doing ngFor?
Problem Statement: I'm using *ngFor to loop through an array and display category names. On click of day I need to open an accordian and show category details (I can do this). Once accordian opens I need to replace fa-plus icon with fa-minus and vice-versa and I need to do this only for clicked day.
How can I achieve this effectively?
this.categoryList = [ {type: 'space', name: 'Space'}, {type: 'energy', name: 'Energy'}, {type: 'comfort', name: 'Comfort'}, {type: 'maintenance', name: 'Maintenance'}, {type: 'reporting', name: 'Reporting'} ];
HTML
<div class="{{category.type}}" *ngFor="let category of categoryList"> <div data-toggle="collapse" [attr.href]="'#'+'category-'+category.type"> <div class="title {{category.name}}">{{category.name}}</div> <div> <i class="fa fa-plus"></i> //needs to toggle between plus and minus <i class="fa fa-minus"></i> //needs to toggle between plus and minus </div> </div> <div class="collapse" id="category-{{category.type}}"> //details </div> </div>
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Pratap A.K about 7 yearsI tried your solution but but its toggling icons for all the categories. Please take a look at attached screen shots. thanks
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angularrocks.com about 7 yearsyeah, you right. I modified the code so now it should work just for each item using an index