<!DOCTYPE html>
<html>
<head>
<title>Messaging Test</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=320, user-scalable=no">
</head>
<body>
<p>Messages received from React Native: 0</p>
<p>(No messages)</p>
<button type="button">
Send message to React Native
</button>
</body>
<script>
var messagesReceivedFromReactNative = 0;
document.addEventListener('message', function(e) {
messagesReceivedFromReactNative += 1;
document.getElementsByTagName('p')[0].innerHTML =
'Messages received from React Native: ' + messagesReceivedFromReactNative;
document.getElementsByTagName('p')[1].innerHTML = e.data;
});
document.getElementsByTagName('button')[0].addEventListener('click', function() {
window.postMessage('"Hello" from the web view');
});
</script>
</html>