跨域 :我进来了--嘿!我又出来了
code2.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="referrer" content="origin" />
<meta property="" />
<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<title>测试(2)原生js跨域传值</title>
</head>
<body>
<script type="text/javascript">
</script>
<!-- 一个 iframe 作为中间件 -->
<iframe id="myIframe"