Specification
[1]
[2]
Compatibility
IE8+, Std
Syntax
<script type="text/javascript"> var iframe = document.createElement("iframe"); iframe.src = "http://a.example.com:8080/index/studio/projects/4what.cn/lab/JavaScript/Window.postMessage/iframe.html"; iframe.style.display = "none"; document.body.appendChild(iframe); iframe.onload = function () { iframe.contentWindow.postMessage("Hello, World!", "http://a.example.com:8080"); }; function receiver(e) { if (e.origin !== "http://a.example.com:8080") { return; } alert("[RESPONSE] " + e.data + " (" + e.origin + ")"); } $js.bind(window, "message", receiver); </script>
iframe.html
<script type="text/javascript"> function receiver(e) { if (e.origin !== "http://example.com:8080") { return; } alert("[REQUEST] " + e.data + " (" + e.origin + ")"); e.source.postMessage("OK", e.origin); } $js.bind(window, "message", receiver); </script>
Example