index.wxml

<van-button
  square
  id="{{ id }}"
  size="large"
  lang="{{ lang }}"
  loading="{{ loading }}"
  disabled="{{ disabled }}"
  open-type="{{ openType }}"
  business-id="{{ businessId }}"
  custom-class="van-goods-action-icon"
  session-from="{{ sessionFrom }}"
  app-parameter="{{ appParameter }}"
  send-message-img="{{ sendMessageImg }}"
  send-message-path="{{ sendMessagePath }}"
  show-message-card="{{ showMessageCard }}"
  send-message-title="{{ sendMessageTitle }}"
  bind:click="onClick"
  binderror="bindError"
  bindcontact="bindContact"
  bindopensetting="bindOpenSetting"
  bindgetuserinfo="bindGetUserInfo"
  bindgetphonenumber="bindGetPhoneNumber"
  bindlaunchapp="bindLaunchApp"
>
  <van-icon
    wx:if="{{ icon }}"
    name="{{ icon }}"
    dot="{{ dot }}"
    info="{{ info }}"
    class="van-goods-action-icon__icon"
    custom-class="icon-class"
  />
  <slot wx:else name="icon" />
  <text class="text-class">{{ text }}</text>
</van-button>