I have an IFrame in a page and IFrame has some JavaScript. At run time JavaScript in IFrame gives exception which i want to catch on parent window. How to do that?
<html>
<head>
<script type="text/javascript">
var frm123 = document.getElementById("frm123");
frm123.contentWindow.onerror = function() {
alert('error caught');
}
function loadData() {
var oRTE = document.getElementById("frm123").contentWindow.document;
oRTE.open();
oRTE.write(txt123.value);
oRTE.close();
}
</script>
</head>
<body>
<input type="button" onclick="loadData();" value="load">
<input type="text" id="txt123">
<iframe id = "frm123" >
</body>
</html>
The answer depends on whether or not you have control of the iframe code, and whether or not it is the same domain.
If same domain then you can do the following to set the error handling function from the wrapping document:
document.getElementById("myiframe").contentWindow.onerror=function() {
alert('error!!');
return false;
}
make sure you wait for the iframe to finish loading before setting the error handler.
If it's not the same domain but you have control of the iframe content (both domains are under your control), you can communicate with the outer frame by using a cross domain communication framework (google it or build it yourself), i.e. catch the error in the iframe by setting the onerror handler from within the iframe and send it through the framework to the outer document.
If it's not the same domain and you don't have control of the iframe, there's no way for the outer document to know what's going on inside it because of security constraints.
There may be few possible causes for .onError() function not to work it may be because of cross domain URL's for this you should implement a check before actulally laoding the iFrame and for that use
var url = "google.com"
var loading_url = "/empty.html"
document.getElementById("iframe").src = loading_url;
$.ajax({
url: url,
type: 'GET',
complete: function(e, xhr, settings){
if(e.status === 200){
document.getElementById("iframe").src = url;
}
}
});
This will not work cross domain, the status code is 0 in those cases.
One more thing to check is .onError() handler please check from below sample if it matches your conditions
How can I handle errors in loading an iframe?
There are many other options or tweaks to handle this kind of errors :
if (frameDoc.title == 'title of page after expection occur')
will also do the work using on .onLoad() event of iFrame.
The only way is if the frame is on the same domain, in which case you can do, from parent:
iframe.contentWindow.onerror = function(){
// handle error
}
Related
For say i have a Site called example.com on which iframe is embedded of domain iframe.net, now i want to read the content of iframe and pass some parameter to display a textual message. Like Hi with username.
Now the problem is this able not able to make connection between the two , even am not able to get the innerHTML of iframe i used following approach
document.getElementById('myframe').contentWindow.document.body.innerHTML;
It throws error "Permission denied to access property"
Do anyone know how to read and write in cross domain platform
If you don't have control over the framed site, you cannot circumvent the cross-domain policy.
If you have control over both sites, you can use the postMessage method to transfer data across different domains. A very basic example:
// framed.htm:
window.onmessage = function(event) {
event.source.postMessage(document.body.innerHTML, event.origin);
};
// Main page:
window.onmessage = function(event) {
alert(event.data);
};
// Trigger:
// <iframe id="myframe" src="framed.htm"></iframe>
document.getElementById('myframe').contentWindow.postMessage('','*');
In Internet Explorer 8, events passed as a parameter may be null, that is why you need to access the event in a different manner:
In frame.html:
window.onmessage = function(event) {
var evt = event || window.event;
evt.source.postMessage('Message from iFrame', evt.origin);
};
On main.html:
window.onmessage = function(event) {
var evt = event || window.event;
alert(evt.data);
};
The event is triggered the same way as Rob W has presented:
document.getElementById('frameId').contentWindow.postMessage('message','*');
It can happen only if you have control for both sites
you can use postMessage
here's how you can apply it
first, you can add the below code to the site you want to retrieve data from
<script>
function test() {
document.getElementById('idMyIframe').contentWindow.postMessage("your message here", "*");
}
</script>
<iframe id="idMyIframe" onload="test()" src="http://example.otherdomaintosenddatato.com"></iframe>
the second step you can add this code below to the other domain you want to send a message or the data to it
window.addEventListener("message", function (message) {
if (message.origin == "http://firstdomain.com") {
console.log(message)
}
});
and please note you must add the test() function on the onload attribute of the iframe cause if the function runs before the iframe was loaded it will become useless and it won't send data
Cross Domain iframe elements access in React with (srcDoc):-
<iframe srcDoc={this.state.HTML} width='100%' id='iframetnd' onLoad={this.onclickinsideiframe}/>
onclickinsideiframe=()=>{
if(document.getElementById('iframetnd')!==null){
let iframe = document.getElementById('iframetnd');
let innerDocument = (iframe.contentDocument)
? iframe.contentDocument
: iframe.contentWindow.document;
let Obj = innerDocument.getElementsByClassName("navButtons")[0];
if(Obj !== undefined){
Obj.onclick = ()=>this.func();
}
}
}
func=()=>{
this.setState({page:2})
this.arrangeTest();
}
iFrame does not allow to access contents from Cross Domain platform. You can only access if your iFrame is using the same domain.
This solution works same as iFrame. I have created a PHP script that can get all the contents from the other website, and most important part is you can easily apply your custom jQuery to that external content. Please refer to the following script that can get all the contents from the other website and then you can apply your cusom jQuery/JS as well. This content can be used anywhere, inside any element or any page.
<div id='myframe'>
<?php
/*
Use below function to display final HTML inside this div
*/
//Display Frame
echo displayFrame();
?>
</div>
<?php
/*
Function to display frame from another domain
*/
function displayFrame()
{
$webUrl = 'http://[external-web-domain.com]/';
//Get HTML from the URL
$content = file_get_contents($webUrl);
//Add custom JS to returned HTML content
$customJS = "
<script>
/* Here I am writing a sample jQuery to hide the navigation menu
You can write your own jQuery for this content
*/
//Hide Navigation bar
jQuery(\".navbar.navbar-default\").hide();
</script>";
//Append Custom JS with HTML
$html = $content . $customJS;
//Return customized HTML
return $html;
}
For say i have a Site called example.com on which iframe is embedded of domain iframe.net, now i want to read the content of iframe and pass some parameter to display a textual message. Like Hi with username.
Now the problem is this able not able to make connection between the two , even am not able to get the innerHTML of iframe i used following approach
document.getElementById('myframe').contentWindow.document.body.innerHTML;
It throws error "Permission denied to access property"
Do anyone know how to read and write in cross domain platform
If you don't have control over the framed site, you cannot circumvent the cross-domain policy.
If you have control over both sites, you can use the postMessage method to transfer data across different domains. A very basic example:
// framed.htm:
window.onmessage = function(event) {
event.source.postMessage(document.body.innerHTML, event.origin);
};
// Main page:
window.onmessage = function(event) {
alert(event.data);
};
// Trigger:
// <iframe id="myframe" src="framed.htm"></iframe>
document.getElementById('myframe').contentWindow.postMessage('','*');
In Internet Explorer 8, events passed as a parameter may be null, that is why you need to access the event in a different manner:
In frame.html:
window.onmessage = function(event) {
var evt = event || window.event;
evt.source.postMessage('Message from iFrame', evt.origin);
};
On main.html:
window.onmessage = function(event) {
var evt = event || window.event;
alert(evt.data);
};
The event is triggered the same way as Rob W has presented:
document.getElementById('frameId').contentWindow.postMessage('message','*');
It can happen only if you have control for both sites
you can use postMessage
here's how you can apply it
first, you can add the below code to the site you want to retrieve data from
<script>
function test() {
document.getElementById('idMyIframe').contentWindow.postMessage("your message here", "*");
}
</script>
<iframe id="idMyIframe" onload="test()" src="http://example.otherdomaintosenddatato.com"></iframe>
the second step you can add this code below to the other domain you want to send a message or the data to it
window.addEventListener("message", function (message) {
if (message.origin == "http://firstdomain.com") {
console.log(message)
}
});
and please note you must add the test() function on the onload attribute of the iframe cause if the function runs before the iframe was loaded it will become useless and it won't send data
Cross Domain iframe elements access in React with (srcDoc):-
<iframe srcDoc={this.state.HTML} width='100%' id='iframetnd' onLoad={this.onclickinsideiframe}/>
onclickinsideiframe=()=>{
if(document.getElementById('iframetnd')!==null){
let iframe = document.getElementById('iframetnd');
let innerDocument = (iframe.contentDocument)
? iframe.contentDocument
: iframe.contentWindow.document;
let Obj = innerDocument.getElementsByClassName("navButtons")[0];
if(Obj !== undefined){
Obj.onclick = ()=>this.func();
}
}
}
func=()=>{
this.setState({page:2})
this.arrangeTest();
}
iFrame does not allow to access contents from Cross Domain platform. You can only access if your iFrame is using the same domain.
This solution works same as iFrame. I have created a PHP script that can get all the contents from the other website, and most important part is you can easily apply your custom jQuery to that external content. Please refer to the following script that can get all the contents from the other website and then you can apply your cusom jQuery/JS as well. This content can be used anywhere, inside any element or any page.
<div id='myframe'>
<?php
/*
Use below function to display final HTML inside this div
*/
//Display Frame
echo displayFrame();
?>
</div>
<?php
/*
Function to display frame from another domain
*/
function displayFrame()
{
$webUrl = 'http://[external-web-domain.com]/';
//Get HTML from the URL
$content = file_get_contents($webUrl);
//Add custom JS to returned HTML content
$customJS = "
<script>
/* Here I am writing a sample jQuery to hide the navigation menu
You can write your own jQuery for this content
*/
//Hide Navigation bar
jQuery(\".navbar.navbar-default\").hide();
</script>";
//Append Custom JS with HTML
$html = $content . $customJS;
//Return customized HTML
return $html;
}
I have an iframe of a certain page from a site that I'm using, but I don't want all the parts of that page to be displayed with the iframe. Particularly, there's a navigation sidebar on the page that I don't want to be in the iframe. I'm trying to achieve this with the javascript seen below, but I can't quite figure it out.
<iframe width="800" height="800" src="scores/new?site_id=193">
<script>
var element = document.getElementById("sidebar-wrapper");
element.parentNode.removeChild(element);
</script>
</iframe>
For security reasons you can't run javascript through iframes. There are some exceptions if you're on the same domain but for the most part you should really avoid it.
If the iframe isn't a site you can control then there's pretty much nothing you can do. If you do control the other site and it's a different domain you might be able to work with the postMessage functions.
Edit: Check out the docs that Mozilla has up here https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
You'd need to create a listener on the inside that handles a message and hides your sidebar. Then on the parent send a message to the iframe to trigger that function.
Parent:
var iframe = document.getElementById('#iframeID');
iframe.contentWindow.postMessage('iframeTrigger');
Iframe:
window.addEventListener('iframeTrigger', hideSidebar);
function hideSidebar() {
//do stuff
}
You can insert a control in the iframed page
//inside the iframed page
var iframe = (function() {
try {
return window.self !== window.top;
} catch (e) {
return true;
}
})();
if(iframe === true) {
var element = document.getElementById("sidebar-wrapper");
element.parentNode.removeChild(element);
}
Hope this could suit your need.
This should work theoretically, and it works in console. But this doesn't work in the HTML, although you are trying it from the same domain, because of security reasons. I just wanted to tell my view and I tried this:
<iframe src="http://output.jsbin.com/figujeyiyo" frameborder="0" id="ifrm">
Sorry, iframes not supported.
</iframe>
<script>
console.log(document.getElementById("ifrm").contentDocument.documentElement.getElementsByTagName("div"));
e = document.getElementById("ifrm").contentDocument.documentElement.getElementsByTagName("div")[0];
console.log(e);
e.parentNode.removeChild(element);
</script>
You need to execute the code when the page loads, you can do it like this:
document.addEventListener('DOMContentLoaded', function() {
var element = document.getElementById("sidebar-wrapper");
element.parentNode.removeChild(element);
});
I need to execute a callback when an IFRAME has finished loading. I have no control over the content in the IFRAME, so I can't fire the callback from there.
This IFRAME is programmaticly created, and I need to pass its data as a variable in the callback, as well as destroy the iframe.
Any ideas?
EDIT:
Here is what I have now:
function xssRequest(url, callback)
{
var iFrameObj = document.createElement('IFRAME');
iFrameObj.src = url;
document.body.appendChild(iFrameObj);
$(iFrameObj).load(function()
{
document.body.removeChild(iFrameObj);
callback(iFrameObj.innerHTML);
});
}
This callsback before the iFrame has loaded, so the callback has no data returned.
First up, going by the function name xssRequest it sounds like you're trying cross site request - which if that's right, you're not going to be able to read the contents of the iframe.
On the other hand, if the iframe's URL is on your domain you can access the body, but I've found that if I use a timeout to remove the iframe the callback works fine:
// possibly excessive use of jQuery - but I've got a live working example in production
$('#myUniqueID').load(function () {
if (typeof callback == 'function') {
callback($('body', this.contentWindow.document).html());
}
setTimeout(function () {$('#frameId').remove();}, 50);
});
I am using jQuery and surprisingly this seems to load as I just tested and loaded a heavy page and I didn't get the alert for a few seconds until I saw the iframe load:
$('#the_iframe').load(function(){
alert('loaded!');
});
So if you don't want to use jQuery take a look at their source code and see if this function behaves differently with iframe DOM elements, I will look at it myself later as I am interested and post here. Also I only tested in the latest chrome.
I have had to do this in cases where documents such as word docs and pdfs were being streamed to the iframe and found a solution that works pretty well. The key is handling the onreadystatechanged event on the iframe.
Lets say the name of your frame is "myIframe". First somewhere in your code startup (I do it inline any where after the iframe) add something like this to register the event handler:
document.getElementById('myIframe').onreadystatechange = MyIframeReadyStateChanged;
I was not able to use an onreadystatechage attribute on the iframe, I can't remember why, but the app had to work in IE 7 and Safari 3, so that may of been a factor.
Here is an example of a how to get the complete state:
function MyIframeReadyStateChanged()
{
if(document.getElementById('myIframe').readyState == 'complete')
{
// Do your complete stuff here.
}
}
The innerHTML of your iframe is blank because your iframe tag doesn't surround any content in the parent document. In order to get the content from the page referred to by the iframe's src attribute, you need to access the iframe's contentDocument property. An exception will be thrown if the src is from a different domain though. This is a security feature that prevents you from executing arbitrary JavaScript on someone else's page, which would create a cross-site scripting vulnerability. Here is some example code the illustrates what I'm talking about:
<script src="http://prototypejs.org/assets/2009/8/31/prototype.js" type="text/javascript"></script>
<h1>Parent</h1>
<script type="text/javascript">
function on_load(iframe) {
try {
// Displays the first 50 chars in the innerHTML of the
// body of the page that the iframe is showing.
// EDIT 2012-04-17: for wider support, fallback to contentWindow.document
var doc = iframe.contentDocument || iframe.contentWindow.document;
alert(doc.body.innerHTML.substring(0, 50));
} catch (e) {
// This can happen if the src of the iframe is
// on another domain
alert('exception: ' + e);
}
}
</script>
<iframe id="child" src="iframe_content.html" onload="on_load(this)"></iframe>
To further the example, try using this as the content of the iframe:
<h1>Child</h1>
Google
<p>Use the preceeding link to change the src of the iframe
to see what happens when the src domain is different from
that of the parent page</p>
I wanted to hide the waiting spinner div when the i frame content is fully loaded on IE, i tried literally every solution mentioned in Stackoverflow.Com, but with nothing worked as i wanted.
Then i had an idea, that when the i frame content is fully loaded, the $(Window ) load event might be fired. And that exactly what happened. So, i wrote this small script, and worked like magic:
$(window).load(function () {
//alert("Done window ready ");
var lblWait = document.getElementById("lblWait");
if (lblWait != null ) {
lblWait.style.visibility = "false";
document.getElementById("divWait").style.display = "none";
}
});
Hope this helps.
This function will run your callback function immediately if the iFrame is already loaded or wait until the iFrame is completely loaded.
This also addresses the following issues:
Chrome initializes every iFrame with an about:blank page which will have readyState == "complete". Later, it will replace `about:blank with the actual iframe src value. So, the initial value of readyState will not represent the readyState of your actual iFrame. Therefore, besides checking for readyState value, this function also addresses the about:blank issue.
DOMContentLoaded event doesn't work with iFrame. So it uses the load event for running the callback function if iFrame isn't already loaded. The load event is equivalent to readyState == "complete" which has been used to check whether iFrame is already loaded. So, in any scenario, the callback function will run after iFrame is fully loaded.
iFrame src can have redirects and therefore load a page different from the original src url. This function will also work in that scenario.
Pass in your callback function that you want to run when the iFrame finishes loading and the <iframe> element to this function:
function iframeReady(callback, iframeElement) {
const iframeWindow = iframeElement.contentWindow;
if ((iframeElement.src == "about:blank" || (iframeElement.src != "about:blank" && iframeWindow.location.href != "about:blank")) && iframeWindow.document.readyState == "complete") {
callback();
} else {
iframeWindow.addEventListener("load", callback);
}
}
I had a similar problem as you. What I did is that I use something called jQuery. What you then do in the javascript code is this:
$(function(){ //this is regular jQuery code. It waits for the dom to load fully the first time you open the page.
$("#myIframeId").load(function(){
callback($("#myIframeId").html());
$("#myIframeId").remove();
});
});
It seems as you delete you iFrame before you grab the html from it. Now, I do see a problem with that :p
Hope this helps :).
I have a similar code in my projects that works fine.
Adapting my code to your function, a solution could be the following:
function xssRequest(url, callback)
{
var iFrameObj = document.createElement('IFRAME');
iFrameObj.id = 'myUniqueID';
document.body.appendChild(iFrameObj);
iFrameObj.src = url;
$(iFrameObj).load(function()
{
callback(window['myUniqueID'].document.body.innerHTML);
document.body.removeChild(iFrameObj);
});
}
Maybe you have an empty innerHTML because (one or both causes):
1. you should use it against the body element
2. you have removed the iframe from the your page DOM
I think the load event is right.
What is not right is the way you use to retreive the content from iframe content dom.
What you need is the html of the page loaded in the iframe not the html of the iframe object.
What you have to do is to access the content document with iFrameObj.contentDocument.
This returns the dom of the page loaded inside the iframe, if it is on the same domain of the current page.
I would retreive the content before removing the iframe.
I've tested in firefox and opera.
Then i think you can retreive your data with $(childDom).html() or $(childDom).find('some selector') ...
I've had exactly the same problem in the past and the only way I found to fix it was to add the callback into the iframe page. Of course that only works when you have control over the iframe content.
Using onload attrbute will solve your problem.
Here is an example.
function a() {
alert("Your iframe has been loaded");
}
<iframe src="https://stackoverflow.com" onload="a()"></iframe>
Is this what you want?
Click here for more information.
I need to execute a callback when an IFRAME has finished loading. I have no control over the content in the IFRAME, so I can't fire the callback from there.
This IFRAME is programmaticly created, and I need to pass its data as a variable in the callback, as well as destroy the iframe.
Any ideas?
EDIT:
Here is what I have now:
function xssRequest(url, callback)
{
var iFrameObj = document.createElement('IFRAME');
iFrameObj.src = url;
document.body.appendChild(iFrameObj);
$(iFrameObj).load(function()
{
document.body.removeChild(iFrameObj);
callback(iFrameObj.innerHTML);
});
}
This callsback before the iFrame has loaded, so the callback has no data returned.
First up, going by the function name xssRequest it sounds like you're trying cross site request - which if that's right, you're not going to be able to read the contents of the iframe.
On the other hand, if the iframe's URL is on your domain you can access the body, but I've found that if I use a timeout to remove the iframe the callback works fine:
// possibly excessive use of jQuery - but I've got a live working example in production
$('#myUniqueID').load(function () {
if (typeof callback == 'function') {
callback($('body', this.contentWindow.document).html());
}
setTimeout(function () {$('#frameId').remove();}, 50);
});
I am using jQuery and surprisingly this seems to load as I just tested and loaded a heavy page and I didn't get the alert for a few seconds until I saw the iframe load:
$('#the_iframe').load(function(){
alert('loaded!');
});
So if you don't want to use jQuery take a look at their source code and see if this function behaves differently with iframe DOM elements, I will look at it myself later as I am interested and post here. Also I only tested in the latest chrome.
I have had to do this in cases where documents such as word docs and pdfs were being streamed to the iframe and found a solution that works pretty well. The key is handling the onreadystatechanged event on the iframe.
Lets say the name of your frame is "myIframe". First somewhere in your code startup (I do it inline any where after the iframe) add something like this to register the event handler:
document.getElementById('myIframe').onreadystatechange = MyIframeReadyStateChanged;
I was not able to use an onreadystatechage attribute on the iframe, I can't remember why, but the app had to work in IE 7 and Safari 3, so that may of been a factor.
Here is an example of a how to get the complete state:
function MyIframeReadyStateChanged()
{
if(document.getElementById('myIframe').readyState == 'complete')
{
// Do your complete stuff here.
}
}
The innerHTML of your iframe is blank because your iframe tag doesn't surround any content in the parent document. In order to get the content from the page referred to by the iframe's src attribute, you need to access the iframe's contentDocument property. An exception will be thrown if the src is from a different domain though. This is a security feature that prevents you from executing arbitrary JavaScript on someone else's page, which would create a cross-site scripting vulnerability. Here is some example code the illustrates what I'm talking about:
<script src="http://prototypejs.org/assets/2009/8/31/prototype.js" type="text/javascript"></script>
<h1>Parent</h1>
<script type="text/javascript">
function on_load(iframe) {
try {
// Displays the first 50 chars in the innerHTML of the
// body of the page that the iframe is showing.
// EDIT 2012-04-17: for wider support, fallback to contentWindow.document
var doc = iframe.contentDocument || iframe.contentWindow.document;
alert(doc.body.innerHTML.substring(0, 50));
} catch (e) {
// This can happen if the src of the iframe is
// on another domain
alert('exception: ' + e);
}
}
</script>
<iframe id="child" src="iframe_content.html" onload="on_load(this)"></iframe>
To further the example, try using this as the content of the iframe:
<h1>Child</h1>
Google
<p>Use the preceeding link to change the src of the iframe
to see what happens when the src domain is different from
that of the parent page</p>
I wanted to hide the waiting spinner div when the i frame content is fully loaded on IE, i tried literally every solution mentioned in Stackoverflow.Com, but with nothing worked as i wanted.
Then i had an idea, that when the i frame content is fully loaded, the $(Window ) load event might be fired. And that exactly what happened. So, i wrote this small script, and worked like magic:
$(window).load(function () {
//alert("Done window ready ");
var lblWait = document.getElementById("lblWait");
if (lblWait != null ) {
lblWait.style.visibility = "false";
document.getElementById("divWait").style.display = "none";
}
});
Hope this helps.
This function will run your callback function immediately if the iFrame is already loaded or wait until the iFrame is completely loaded.
This also addresses the following issues:
Chrome initializes every iFrame with an about:blank page which will have readyState == "complete". Later, it will replace `about:blank with the actual iframe src value. So, the initial value of readyState will not represent the readyState of your actual iFrame. Therefore, besides checking for readyState value, this function also addresses the about:blank issue.
DOMContentLoaded event doesn't work with iFrame. So it uses the load event for running the callback function if iFrame isn't already loaded. The load event is equivalent to readyState == "complete" which has been used to check whether iFrame is already loaded. So, in any scenario, the callback function will run after iFrame is fully loaded.
iFrame src can have redirects and therefore load a page different from the original src url. This function will also work in that scenario.
Pass in your callback function that you want to run when the iFrame finishes loading and the <iframe> element to this function:
function iframeReady(callback, iframeElement) {
const iframeWindow = iframeElement.contentWindow;
if ((iframeElement.src == "about:blank" || (iframeElement.src != "about:blank" && iframeWindow.location.href != "about:blank")) && iframeWindow.document.readyState == "complete") {
callback();
} else {
iframeWindow.addEventListener("load", callback);
}
}
I had a similar problem as you. What I did is that I use something called jQuery. What you then do in the javascript code is this:
$(function(){ //this is regular jQuery code. It waits for the dom to load fully the first time you open the page.
$("#myIframeId").load(function(){
callback($("#myIframeId").html());
$("#myIframeId").remove();
});
});
It seems as you delete you iFrame before you grab the html from it. Now, I do see a problem with that :p
Hope this helps :).
I have a similar code in my projects that works fine.
Adapting my code to your function, a solution could be the following:
function xssRequest(url, callback)
{
var iFrameObj = document.createElement('IFRAME');
iFrameObj.id = 'myUniqueID';
document.body.appendChild(iFrameObj);
iFrameObj.src = url;
$(iFrameObj).load(function()
{
callback(window['myUniqueID'].document.body.innerHTML);
document.body.removeChild(iFrameObj);
});
}
Maybe you have an empty innerHTML because (one or both causes):
1. you should use it against the body element
2. you have removed the iframe from the your page DOM
I think the load event is right.
What is not right is the way you use to retreive the content from iframe content dom.
What you need is the html of the page loaded in the iframe not the html of the iframe object.
What you have to do is to access the content document with iFrameObj.contentDocument.
This returns the dom of the page loaded inside the iframe, if it is on the same domain of the current page.
I would retreive the content before removing the iframe.
I've tested in firefox and opera.
Then i think you can retreive your data with $(childDom).html() or $(childDom).find('some selector') ...
I've had exactly the same problem in the past and the only way I found to fix it was to add the callback into the iframe page. Of course that only works when you have control over the iframe content.
Using onload attrbute will solve your problem.
Here is an example.
function a() {
alert("Your iframe has been loaded");
}
<iframe src="https://stackoverflow.com" onload="a()"></iframe>
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