微信小程序动态绑定设置class的方法

<view class="{{active ? 'active' : ''}}">Hello World</view>
<button bindtap="toggleActive">Toggle Active</button>

Page({
  data: {
    active: false
  },
  toggleActive: function () {
    this.setData({
      active: !this.data.active
    })
  }
})