Ionic4 ，Pictures on the slides TAB Click will be magnified，why？

Ionic Framework
1

html ：
<ion-slides #slides *ngIf="!showSlides" pager=“true” [options]=“slideOpts” mode=“ios” (ionSlideWillChange)=“slidesChange()”>

<ion-slide>

<img src=“assets/images/guide1.jpg” style=“width:100%;height:180px;” />

</ion-slide>

<ion-slide>

<img src=“assets/images/guide2.jpg” style=“width:100%;height:180px;” />

</ion-slide>

<ion-slide>

<img src=“assets/images/guide3.jpg” style=“width:100%;height:180px;” />

</ion-slide>

</ion-slides>

In the Google Chrome click image will be magnified