重叠两个按钮抖动

<button class="button1">按钮1</button>
<button class="button2">按钮2</button>

.button1,
.button2 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 40px;
  background-color: #ccc;
  border: none;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
}

.button1 {
  z-index: 1;
}

.button2 {
  z-index: 2;
}

@keyframes shake {
  0% {
    transform: translate(-50%, -50%);
  }
  25% {
    transform: translate(-55%, -50%);
  }
  50% {
    transform: translate(-50%, -50%);
  }
  75% {
    transform: translate(-45%, -50%);
  }
  100% {
    transform: translate(-50%, -50%);
  }
}

.shake {
  animation: shake 0.5s infinite;
}

const button1 = document.querySelector('.button1');
const button2 = document.querySelector('.button2');

button1.addEventListener('click', () => {
  button2.classList.toggle('shake');
});

button2.addEventListener('click', () => {
  button1.classList.toggle('shake');
});