老师，我这个为什么执行不出来

import { SLIDER_ANIMATION_CLASS_NAME } from "./constants";
import DEFAULTS from './defaults'
class BaseSlider{
  constructor(el,options){
    if(el.nodetype!==1){
      throw new Error('实例化的时候，请传入DOM元素！');
    }
    this.options={
      ...DEFAULTS,
      ...options
    };
    const sliderEl=el;
    const sliderContentEl=document.querySelector('.slider-content');
    const sliderItemEls=sliderContentEl.querySelectorAll('.slider-item');
    this.sliderEl=sliderEl;
    this.sliderContentEl=sliderContentEl;
    this.sliderItemEls=sliderItemEls;
    this.minIndex=0;
    this.maxIndex=sliderItemEls.length-1;
    this.currIndex=this.getCorrectedIndex(this.options.initalIndex);
    this.itemWidth=sliderItemEls[0].offsetWidth;
    this.init();
  }
  getCorrectedIndex(index){
    if(index<this.minIndex) return this.maxIndex;
    if(index>this.maxIndex) return this.minIndex;
    return index;
  }
  init(){
    //设置sliderItemEls的宽度
    this.setItemWidth();
    //设置sliderContentEl的宽度
    this.setContentWidth();
    this.move(this.getDistance());
    if(this.options.animation){
      this.openAnimation();
    }
    if(this.options.autoplay){
      this.autoplay();
    }
  }
  next(){
    this.to(this.currIndex+1);
  }
  prev(){
    this.to(this.currIndex-1);
  }
  to(index){
    index=this.getCorrectedIndex(index);
    if(this.currIndex===index)return;
    this.currIndex=index;
    const distance=this.getDistance();
    if(this.options.animation){
      this.moveWidthAnimation(distance);
    }else{
      this.move(distance);
    }
  }
  pause(){
    clearInterval(this.autoplayTimer)
  }
  setItemWidth(){
    for(const item of sliderItemEls){
      item.style.width=`${itemWidth}px`;
    }
  }
  setContentWidth(){
    this.sliderContentEl.style.width=`${this.itemWidth*this.sliderItemEls.length}px`;
  }
  move(distance){
    this.sliderContentEl.style.transform=`translate3d(${distance}px,0px,0px)`;
  }
  getDistance(index=this.currIndex){
    return this.itemWidth*index;
  }
  openAnimation(){
    this.sliderContentEl.classList.add(SLIDER_ANIMATION_CLASS_NAME);
  }
  closeAnimation(){
    this.setAnimationSpeed(0);
  }
  moveWidthAnimation(distance){
    this.setAnimationSpeed();
    this.move(distance);
    this.sliderContentEl.addEventListener('transitionend',()=>{
      this.closeAnimation();
    },false)
  }
  setAnimationSpeed(speed=this.options.speed){
    this.sliderContentEl.style.transitionDuration=`${speed}ms`
  }
  autoplay(){
    const {autoplay}=this.options;
    if(autoplay<=0) return;
    this.pause();
    this.autoplayTimer=setInterval(()=>{
      this.next();
    },autoplay)
  }

}
export default BaseSlider;