前端vue3手动设置滚动条位置/自动定位详细代码

  function scrollTop() {
    if (leftRef.value) {
      console.log('99', leftRef.value);

      nextTick(() => {
        leftRef.value.scrollTop = 1000;
        // scrollBy(0, document.body.scrollWidth);
      });
    }
  }

onMounted(async () => {
    if (router.currentRoute.value.query.id) {
      positionChooseCode.value = router.currentRoute.value.query.id;
      positionStatusValue.value = router.currentRoute.value.query.id;
    }
    const positionId = router.currentRoute.value.query.positionId;
    if (!!positionId) {
      cStore.setPositionId(positionId);
    }

    console.log('mounted--positionId', positionId);

    await getPositionDictionary(positionChooseCode.value, '');
    await getDictionaries();
    scrollTop();
  });

    console.log('positionList.value', positionList.value);

    rowItemId.value = item.id;
    //找到前面有多少个元素
    let index = positionList.value.findIndex((it) => it.id === rowItemId.value);
    console.log('找到前面有多少个元素', index + 1);
    num.value = index - 2;

获取当前职位，当前职位会有class==red的，通过class获取ele;

 const sortableEles = document.querySelectorAll('.red');
      console.log(sortableEles);
      let itemHeight = 0;
      if (sortableEles.length > 0) {
        const firstListItem = sortableEles[0];
        itemHeight = firstListItem.offsetHeight; // 获取元素的高度，包括内边距和边框
        console.log('第一个列表项的高度:', itemHeight);
        console.log(' num.value', num.value);
      }