随笔的一些小技巧

1，轮播图在到达最后一张后返回第一张

    let i = 0;
    setInterval(() => {
      // tslint:disable-next-line:max-line-length
      this.rd2.setProperty(this.imgSlider?.nativeElement,
        'scrollLeft',
        (++i % this.sliders.length * this.imgSlider?.nativeElement.scrollWidth) / this.sliders.length);
    }, this.intervalBySeconds * 1000);