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Asked: 2026-06-17T12:16:44+00:00

I have a webapplication (asp.net / html, css, etc). I’ve updated my stylesheet and

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I have a webapplication (asp.net / html, css, etc).
I’ve updated my stylesheet and deployed it on my webserver.
Now some of my users / customers are still using the old css files.

I did this already

My telephone is ringing and I have to tell my customers to use F5 to reload the page. After that the stylesheet is updated.

My webapplication is using iframes. The problem maybe within the iframes?

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  1. Editorial Team

    In Firefox (and other browsers), F5 is simple refresh while CTRL + F5 forces a cache refreh too and force reload static resources, you should tell them to do CTRL + F5 at the phone…

    Your problem is cache-related, if you don’t want the browsers to cache your CSSs you can instruct them with metatags and writing to the response setting the Cache-Control attribute (take a look at this)

    Or you can configure it in your Web Server directly (in Apache it would be something like

    ExpiresActive On
ExpiresDefault “access plus 10 days”
ExpiresByType text/css “access plus 1 second”

    Or use some ugly trick like adding timestamp to the link to CSS: http://css-tricks.com/can-we-prevent-css-caching/

    BTW the cache will expires on its own somewhere in the future…

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