文档

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

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按钮关键属性

open-type="contact"

功能按钮

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

分享

<button class="mo-open-type" open-type="share"></button>

css样式

父元素需要设置为相对定位，使用障眼法，将按钮元素隐藏，避免影响当前布局和样式

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

.mo-open-type::after {
    border: none;
}

或者

.mo-open-type {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  opacity: 0;
}