Unable to get frame content, Uncaught DOMException: Blocked a frame with origin "null" from accessing a cross-origin frame
I'm trying to access html document from one of my frames with javascript, but I'm getting a Uncaught DOMException: Blocked a frame with origin "null" from accessing a cross-origin frame. error.
This is the main page:
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<script>
(function(window, document, undefined){
window.onload = init;
function init(){
var iframe = document.getElementById('main_frame');
var innerDoc = (iframe.contentDocument) ? iframe.contentDocument : iframe.contentWindow.document;
var ulObj = innerDoc.getElementById("div-content");
console.log(ulObj.innerHTML);
}
})(window, document, undefined);
</script>
</head>
<frameset rows="*" noresize="noresize" border="0" frameborder="no" framespacing="0">
<frame src="frame.html" id="main_frame" frameborder="no" marginheight="0" marginwidth="0">
</frameset>
</html>
And this is the frame:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div id="div-content">
abc
</div>
</body>
</html>
As you can see, I'm trying to extract the div's content which is: "abc".
I think that both: iframe.contentDocument : iframe.contentWindow.document are null and I don't know why.
Answer
It looks like if you're trying to access frames directly from your browser without having a web service, you're not allowed due to security reasons (you could access system files).
I have soled my issue by installing xampp and moved all my files to htdocs and everything worked as expected.