javascript disable scroll event

javascript disable scroll event

Document: scroll event

https://developer.mozilla.org/en-US/docs/Web/API/Document/scroll_event

https://developer.mozilla.org/en-US/docs/Web/API/Element/scroll_event

  stopScrollEvent = (e) => {
    // log(`stop 滚动穿透`, e);
    e.preventDefault();
    e.stopPropagation();
    // e.stopPropagation();
    // e.preventDefault();
    this.handleTouchScroll();
    return;
  }

  handleTouchScroll = (flag = `true`) => {
    log(`touch scroll`)
    // if (ENV !== Taro.ENV_TYPE.WEB) {
    //   return
    // }
    document.body.addEventListener(`scroll`, (e) => {
      e.preventDefault();
      e.stopPropagation();
      return;
      log(`no scroll event`)
    });
    let scrollTop = 0;
    if (flag) {
      scrollTop = document.documentElement.scrollTop
      // 使body脱离文档流
      document.body.classList.add('at-frozen')
      // 把脱离文档流的body拉上去！否则页面会回到顶部！
      document.body.style.top = `${-scrollTop}px`
    } else {
      document.body.style.top = null
      document.body.classList.remove('at-frozen')
      document.documentElement.scrollTop = scrollTop
    }
  }

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https://javascript.info/onscroll

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