I'm working on a website, and I've run into trouble modifying an HTTP Response header using (client-side) JavaScript. I have exactly zero idea how to do this. I know (roughly) how to make the 'for' loop to modify the header, but I don't know how to access the header within the script. Could y'all fine people help me with this fun task?

I'm working on a website, and I've run into trouble modifying an HTTP Response header using (client-side) JavaScript. I have exactly zero idea how to do this. I know (roughly) how to make the 'for' loop to modify the header, but I don't know how to access the header within the script. Could y'all fine people help me with this fun task?

• javascript
• html
• http

• 3 mind if I ask what you're trying to acplish by doing this? – Zach Lysobey Commented Jan 15, 2014 at 22:07
• 1 But I think this has your answer: stackoverflow./questions/220231/… – Zach Lysobey Commented Jan 15, 2014 at 22:08
• 2 @Barmar: Depends on where the JavaScript is running. If it's running on the server... – T.J. Crowder Commented Jan 15, 2014 at 22:08
• 1 @T.J.Crowder Unless they specifically say they're using something like Node.js, I'm going to regularly assume that JS == client, not server. – Barmar Commented Jan 15, 2014 at 22:09
• 1 Alright, for clarification: I need to modify the response header to remove X-Frame-Options to load one site in an iFrame. Is it possible to have the script run after receipt of the header, then pass the header along to the iFrame afterwards? – bluebunny Commented Jan 15, 2014 at 22:10

1 Answer 1

With client-side JavaScript (JavaScript running in a browser), you can't do this; by the time the JavaScript code runs, the headers have already been processed.