PhotoGallery.js

<InfiniteScroll
   loadMore={this.fetchPhotos}
   hasMore={this.state.hasMore}
   loader={<div style={{padding:"70px"}} key={0}><LinearProgress color="secondary" /></div>}
>
   <div style={{ marginTop: "80px", position: "relative", textAlign: "center" }}>
       <div className="image-grid" style={{ marginTop: "30px" }}>
           {gallery}
       </div>
       {this.state.openLightBox ?
       <LightBox src={this.state.lightBoxImg} callback={this.closeLightBox} />
       : null}
   </div>
</InfiniteScroll>