如何制作充水翻转按钮？

<div class="flip-button">
  <div class="flip-button-inner">
    <div class="flip-button-front">点击翻转</div>
    <div class="flip-button-back">翻转后的内容</div>
  </div>
</div>

.flip-button {
  perspective: 1000px;
  width: 200px;
  height: 100px;
  cursor: pointer;
}

.flip-button-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.flip-button:hover .flip-button-inner {
  transform: rotateY(180deg);
}

.flip-button-front, .flip-button-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 20px;
}

.flip-button-front {
  background-color: #4CAF50;
  color: white;
}

.flip-button-back {
  background-color: #f44336;
  color: white;
  transform: rotateY(180deg);
}

document.querySelector('.flip-button').addEventListener('click', function() {
  this.classList.toggle('flipped');
});