I have referred http://idangero.us/swiper/ for more functionality, as per documentation & example.
page.ts file
public sliderOptions = { loop: true, pager: true, preloadImages: false, lazyLoading: true }
page.html
<ion-slide *ngFor="let image of product.images;">
<img data-src="{{product.imagePath.main+image}}" class="swiper-lazy">
<div class="swiper-lazy-preloader swiper-lazy-preloader-white"></div>
</ion-slide>
but it’s not working…!! and shows a null image in
<img src="null">
Help me as soon as possible…