微信小程序简单做一个盖章动画。
js:

this.setData({
  showSeal: true,
})
this.animate(".seal", [
  {opacity: 0, scale: [5, 5]},
  {opacity: 1, scale: [1, 1], ease: 'ease'}
], 700, function () {
  this.clearAnimation(".seal");
}.bind(this));

wxml:

<view class="seal">
  <image wx:if="{{showSeal}}" mode="aspectFit" src="{{sealImg}}"></image>
</view>