metro/debugger.html

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<!doctype html>
<html>
<head>
<meta charset=utf-8>
<!-- Fake favicon, to avoid extra request to server -->
<link rel="icon" href="data:;base64,iVBORw0KGgo=">
<title>React Native Debugger</title>
<script>
(function() {
var sessionID = window.localStorage.getItem('sessionID');
window.localStorage.removeItem('sessionID');
window.onbeforeunload = function() {
if (sessionID) {
return 'If you reload this page, it is going to break the debugging session. ' +
'You should ⌘+R in the iOS simulator to reload.';
}
};
function setStatus(status) {
document.getElementById('status').innerHTML = status;
}
var messageHandlers = {
// This method is a bit hacky. Catalyst asks for a new clean JS runtime.
// The easiest way to do this is to reload this page. That also means that
// web socket connection will be lost. To send reply back we need to remember
// message id
'prepareJSRuntime': function(message) {
window.onbeforeunload = undefined;
window.localStorage.setItem('sessionID', message.id);
window.location.reload();
},
'executeApplicationScript:sourceURL:onComplete:': function(message, sendReply) {
for (var key in message.inject) {
window[key] = JSON.parse(message.inject[key]);
}
loadScript(message.url, sendReply.bind(null, null));
},
'executeJSCall:method:arguments:callback:': function(message, sendReply) {
var returnValue = [[], [], [], [], []];
try {
if (window && window.require) {
returnValue = window.require(message.moduleName)[message.moduleMethod].apply(null, message.arguments);
}
} finally {
sendReply(JSON.stringify(returnValue));
}
}
}
var ws = new WebSocket('ws://' + window.location.host + '/debugger-proxy');
ws.onopen = function() {
if (sessionID) {
setStatus('Debugger session #' + sessionID + ' active');
ws.send(JSON.stringify({replyID: parseInt(sessionID, 10)}));
} else {
setStatus('Waiting for simulator');
}
}
ws.onmessage = function(message) {
var object = JSON.parse(message.data);
var sendReply = function(result) {
ws.send(JSON.stringify({replyID: object.id, result: result}));
}
var handler = messageHandlers[object.method];
if (handler) {
handler(object, sendReply);
} else {
console.warn('Unknown method: ' + object.method);
}
}
ws.onclose = function() {
setStatus('Disconnected from proxy. Is node server running?');
}
function loadScript(src, callback) {
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = src;
script.onload = callback;
document.head.appendChild(script);
}
})();
</script>
<style type="text/css">
.shortcut {
font-family: monospace;
color: #eee;
background-color: #333;
padding: 4px;
border-radius: 4px;
letter-spacing: 3px;
}
body {
font-size: large;
}
</style>
</head>
<body>
<p>
React Native JS code runs inside this Chrome tab
</p>
<p>Press <span class="shortcut">⌘⌥J</span> to open Developer Tools. Enable <a href="http://stackoverflow.com/a/17324511/232122" target="_blank">Pause On Caught Exceptions</a> for a better debugging experience.</p>
<p>Status: <span id="status">Loading</span></p>
</body>
</html>