js 中主窗口与 iframe 通信
if (window.top === window.self) { window.addEventListener('message', function (event) { alert(event.data) }); } else { window.parent.postMessage("Hello from iframe!", "*"); }
桂棹兮兰桨，击空明兮溯流光。
if (window.top === window.self) { window.addEventListener('message', function (event) { alert(event.data) }); } else { window.parent.postMessage("Hello from iframe!", "*"); }