微信小程序：button微信开放能力打开客服会话

文档

• https://developers.weixin.qq.com/miniprogram/dev/component/button.html

按钮关键属性

open-type="contact"

功能按钮

<button class="button__open-type"
        open-type="contact">
</button>

css样式

父元素需要设置为相对定位

.button__open-type {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background-color: transparent;
  padding: 0;
  margin: 0;
}

.button__open-type::after {
    border: none;
}