message: fix(Calendar): render error when using rem unit
diff: @@ -258,8 +258,15 @@ export default createComponent({
  let height = 0;
  let currentMonth;
  + // add offset to avoid rem accuracy issues
  + // see: https://github.com/youzan/vant/issues/6929
  + const viewportOffset = 50;
  + const viewportTop = top - viewportOffset;
  + const viewportBottom = bottom + viewportOffset;
  +
  for (let i = 0; i < months.length; i++) {
  - const visible = height <= bottom && height + heights[i] >= top;
  + const visible =
  + height <= viewportBottom && height + heights[i] >= viewportTop;
  if (visible && !currentMonth) {
  currentMonth = months[i];
  