It seems that all the browsers other than Opera cache XHR requests in my Javascript program. The URL in the XHR request refers to a CGI program on the server which generates a different output everytime its called. B Is there a way in Javascript to make the browser not cache XHR requests?

It seems that all the browsers other than Opera cache XHR requests in my Javascript program. The URL in the XHR request refers to a CGI program on the server which generates a different output everytime its called. B Is there a way in Javascript to make the browser not cache XHR requests?

• javascript
• ajax
• xmlhttprequest

1 Answer 1

For every AJAX request you make, generate a unique value and add it to the ajax URL as a query parameter:

/example/url/post.php?rand=09809807896768

I use to generate the current unix timestamp in JS and use that - this ensures I do not get duplicated stamps.

That way every request is unique and will not get cached. This is a simple but fairly mon AJAX trick - usually fixing IE and testing issues.

If you were to use jQuery, it does this for you by setting the property cache to false on the AJAX settings.