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<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Test page for window.postMessage</title>
</head>
<body>
<div id="display" style="white-space:pre; font-family:monospace; display:inline;"></div>
<input type="button" id="button" title="button"/>
<script>
const TEST_PATH = "http://example.org/browser/browser/components/originattributes/test/browser/file_postMessageSender.html";
window.onload = () => {
window.addEventListener("message", aEvent => {
if (aEvent.data === "Message") {
document.getElementById("display").innerHTML = "Message";
}
});
document.getElementById("button").onclick = () => {
window.postMessage("Self", "/");
};
};
</script>
</body>
</html>