Javascript injected into iframe of same origin not working

Asked Feb 22 '14 at 04:59

Active Mar 22 '18 at 06:45

Viewed 468 times

In the parent window, I have this script

 function injectJS() {
 var myIframe = document.getElementById("MyFrame");
 var script = myIframe.contentWindow.document.createElement("script");
 script.type = "text/javascript";
 script.src = "/myscript.js";
 myIframe.contentWindow.document.body.appendChild(script);
 }

then for my iframe, I have

 <iframe id="MyFrame" onload="injectJS()"></iframe>

As I inspect the iframe element, I see the script tag has been inserted with it's source being the script I wanted /myscript.js. So everything appears to be working however the script is not working. Nothing is wrong with the script as it works fine everywhere else. What could be causing it to not work in the iframe even though the script tag was successfully injected and links to the script I want loaded.

asked Feb 22 '14 at 04:59

Brandon

How do you know the script in /myscript.js doesn't run? What's in it that you're expecting? – jfriend00 Feb 22 '14 at 05:05
Do you see any errors in the Network tab? – Barmar Feb 22 '14 at 05:05
If simply run alert in `myscript.js`, the file is performing, may be problem in your scripts at `myscript.js` – Suman Bogati Feb 22 '14 at 05:07
I'm expecting a simple alert message just for testing purposes. It works everywhere else. – Brandon Feb 22 '14 at 05:07
Yes, myscript does run an alert. Not working though. – Brandon Feb 22 '14 at 05:08
Is it possible to show the `scripts` at `myscript.js` which are not working? – Suman Bogati Feb 22 '14 at 05:10
can you use the console in the context of the iframe to see if any variables are being created from `myscript`? – Patrick Gunderson Feb 22 '14 at 06:19

Javascript injected into iframe of same origin not working

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