// pages/test/test.jsPage({ containerTap: function (res) {  var that = this  var x = res.touches[0].pageX;  var y = res.touches[0].pageY + 85;  this.setData({   rippleStyle: ''  });  setTimeout(function () {   that.setData({    rippleStyle: 'top:' + y + 'px;left:' + x + 'px;-webkit-animation: ripple 0.4s linear;animation:ripple 0.4s linear;'   });  }, 200) },})

<view class="ripple" style="{{rippleStyle}}"></view><view class="container" bindtouchstart="containerTap"></view>

page{height:100%}.container{  width:100%;  height:100%;  overflow: hidden}.ripple {  background-color:aquamarine;  border-radius: 100%;  height:10px;  width:10px;  margin-top: -90px;  position: absolute;    overflow: hidden}@-webkit-keyframes ripple {  100% {  webkit-transform: scale(12);  transform: scale(12);  background-color: transparent;  }}