@keyframes once-show {
  from {
    top: 0;
  }
}
uni-resize-sensor,
uni-resize-sensor > div {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}
uni-resize-sensor {
  display: block;
  z-index: -1;
  visibility: hidden;
  animation: once-show 1ms;
}
uni-resize-sensor > div > div {
  position: absolute;
  left: 0;
  top: 0;
}
uni-resize-sensor > div:first-child > div {
  width: 100000px;
  height: 100000px;
}
uni-resize-sensor > div:last-child > div {
  width: 200%;
  height: 200%;
}