Uni app wechat applet sharing function

1： The native menu in the upper right corner of the applet has its own share button

 

 2： Or a share button placed on the page <button>

<button class="separate-fl" plain="true" data-name="shareBtn" open-type="share">
           <text class="icon-fenxiang iconfont"></text>
            <text class="separate-text"> Share </text>                     
 </button>

Both types of sharing trigger onShareAppMessage function , stay js The function is defined in , Set the information shared by the page ,

Be careful ： This function and  onLoad And so on

Official documents ：https://uniapp.dcloud.io/api/plugins/share?id=onshareappmessage

The renderings are as follows ：