iframe可通过postMessage解决跨域、跨窗口消息传递

https://www.cnblogs.com/dorothyorsusie/p/6178599.html

跨域微信分享https://blog.csdn.net/hsdllcw/article/details/79326189

 //iframe传参给父级页面
 function give_info(){
     console.log("触发事件");
     window.parent.postMessage(1,'*');
 }

//接收值
window.addEventListener('message',function(e){
            var color=e.data;
            document.getElementById('color').style.backgroundColor=color;
},false);