记一次用js实现页面滚动到底部效果

scrollToBottom = () => {
      console.log('scrollToBottom');
      (function smoothscroll() {
        const currentScroll = document.documentElement.scrollTop || document.body.scrollTop; // 已经被卷掉的高度
        const clientHeight = document.documentElement.clientHeight; // 浏览器高度
        const scrollHeight = document.documentElement.scrollHeight; // 总高度
        if (scrollHeight - 10 > currentScroll + clientHeight) {
          window.requestAnimationFrame(smoothscroll);
          window.scrollTo(0, currentScroll + (scrollHeight - currentScroll - clientHeight) / 2);
        }
      })();
    };
    setTimeout(scrollToBottom, 100);