Like reaction in each element in ionic 3 - ionic-framework

Question

I am using ionic 3, and looping ion-card with like using ngFor. I want to know how can I react with the user when user click the like/unlike button in each ion-card without reload the list.
<ion-card *ngFor="let u of users">
<p>{{u.name}}</p>
<button ion-button [hidden]="u.isliked=='1'" (click)="like(u.id)">like</button>
<button ion-button [hidden]="u.isliked!='1'" (click)="unlike(u.id)">unlike</button>
</ion-card>

Answer 1

You can make use of the *ngIf operator. This won't hide the element like the hidden property, but actually removes the element from the DOM.
(made u.isLiked into a boolean because I think it's cleaner that way, personal preference. Also changed (click) to (tap), see the answer on ionic2 tap vs click for more details.)
<ion-card *ngFor="let u of users">
<p>{{u.name}}</p>
<button ion-button *ngIf="u.isLiked" (tap)="like(u.id)">like</button>
<button ion-button *ngIf="!u.isliked" (tap)="unlike(u.id)">unlike</button>
</ion-card>
And in your ts:
like(userId) {
for(let user of this.users) {
if(user.id == userId) {
user.isLiked = true;
}
}
}
unlike(userId) {
for(let user of this.users) {
if(user.id == userId) {
user.isLiked = false;
}
}
}