押すとイヤイヤするボタン

<style>
@keyframes shake {
  0%    {transform:translate(0,0)}
  12.5% {transform:translate(5px,0)}
  25%   {transform:translate(0px,0)}
  37.5% {transform:translate(-5px,0)}
  50%   {transform:translate(0,0)}
  62.5% {transform:translate(5px,0)}
  75%   {transform:translate(0,0)}
  87.5% {transform:translate(-5px,0)}
  100%  {transform:translate(0,0)}
}

button:active {
  animation: shake .2s
}
</style>