text: class LazyLoader {
    constructor(params) {
      const {
        img,
        src,
        dSrc,
        sTop,
        callback
      } = params;
  
      this.img = img;
      this.src = src;
      this.dSrc = dSrc;
      this.sTop = sTop;
      this.callback = callback;
    }
  
    static createLazyLoader({ src, dSrc, sTop, callback }) {
      const img = new Image();
      return new LazyLoader({ img, src, dSrc, sTop, callback });
    }
  
    load() {
      this.img.onload = () => {
        this.callback({ src: this.src });
      }
  
      this.img.onerror = this.img.onabort = () => {
        this.callback({ src: this.dSrc });
      }
  
      this.img.src = this.src;
    }
  }
  
  export default LazyLoader;
  