jsapi返回值需要在配置文件里面添加

<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET" />
<add name="Access-Control-Allow-Headers" value="x-requested-with,content-type" />
<add name="Access-Control-Allow-Origin" value="*" />
</customHeaders>
</httpProtocol>

原文：https://www.cnblogs.com/xuxian001/p/12867986.html