js代码

<script>
var animateButton = function(e) {

  e.preventDefault;
  //reset animation
  e.target.classList.remove('animate');
  
  e.target.classList.add('animate');
  setTimeout(function(){
    e.target.classList.remove('animate');
  },700);
};

var classname = document.getElementsByClassName("bubbly-button");

for (var i = 0; i < classname.length; i++) {
  classname[i].addEventListener('click', animateButton, false);
}
</script>