Show Checkbox Alert with "All Items" Option

[fishgrind]

have a look at this post:

Ion-select with "select all" option

You can controll js. in html template. <ion-item> <ion-label>Toppings</ion-label> <ion-select [(ngModel)]="toppings" multiple="true"> <ion-option>Bacon</ion-option> <ion-option>Black Olives</ion-option> <ion-option>Extra Cheese</ion-option> <ion-option>Mushrooms</ion-option> <ion-option>Pepperoni</ion-option> <ion-option>Sausage</ion-option> </ion-select> </ion-item> <button (click)="read();">select all</button> in ts. private toppings;…

does that help?