angular6 uses ngx-swiper-wrapper@5.3.8 or 6 version, and finds that it cannot be played
I follow this
https://www.jianshu.com/p/54a.

html:

<div class="swiper-container" [swiper]="swipeleft">
      <div class="swiper-wrapper">
           <div class="swiper-slide" *ngFor="let item of textCarouselleft">
               <a target="_blank" :href="{{item.href}}">
                  
{{item.title}} 
                </a>
                <span>{{item.date}}</span>
           </div>
      </div>
</div>

ts:

this.swipeleft  = {
  slidesPerView: 18,
  direction: "vertical",
  loop: true,
  autoplay: true,
  speed: 1000,

};

less:

I do not know why, I changed two versions, both are like this, slidesPerView: 18, this I set 18, but only 8, I do not know what is wrong with me, which god to help, thank you very much