Ion-fab-button, show property is not working

Ionic Framework Ionic Angular
1

hi, i am using v7, below is my code, here show property is not working. Basically i want to show this icon based on item selected, else not.


<ion-icon [name]=“iconNameService.caretUpLarge”>


<ion-fab-button [show]=“isMultiSelected”>
<ion-icon [name]=“iconNameService.filter”>


Thanks