System a uses window.open to call system B, and system B carries data back to system a after processing the business

1. A System core code block （ domain name ：www.lgfq.work）

openB: function () {
    
      var _this = this;
      var iWidth = 1400;
      var iHeight = 750;
      var iTop = (window.screen.availHeight - 30 - iHeight) / 2;
      var iLeft = (window.screen.availWidth - 10 - iWidth) / 2;
      window.open("https://www.lgcxc.cn/xxx", " call B System ", "width=" + iWidth + ", height=" + iHeight + ",top=" + iTop + ",left=" + iLeft + ",toolbar=no, menubar=no, scrollbars=no, resizable=no,location=no, status=no,alwaysRaised=yes,depended=yes");
      window.addEventListener('message', function (e) {
    
        console.log(e.data);
      }, false);
},

2. B System core code block （ domain name ：www.lgcxc.cn）

 if (window.opener != null && !window.opener.closed) {
    
	window.opener.postMessage(JSON.stringify({
    
	   exp_group_id: data.data.exp_group_id
	 }), 'https://www.lgfq.work/xxx');
	 window.close();
    } else {
    
	//  Other processing logic 
}