Why Does My CSS Look Different on the Web Server Compared to My Development Environment?

CSS Rendering Differences between Development Environment and Web Server

When uploading a web application from a development environment to a web server, discrepancies in CSS rendering may arise. One possible cause of this issue is the different rendering modes used by browsers for local and Internet servers.

In Internet Explorer 8, Microsoft implemented distinct rendering modes for these two scenarios to prevent web developers from experiencing rendering inconsistencies. When a website is accessed locally, it is rendered in "EmulateIE7" mode. However, when the same website is accessed through the Internet, it is rendered in the latest available mode, which is IE8's standards mode.

To resolve this issue, you can force Internet Explorer 8 to render the application in standards mode by adding either an X-UA-Compatible header or a META tag to the HTML code. Doing so will ensure that the same rendering mode is used in both the development environment and the web server.

Another resource to consider when addressing this issue is sharovatov.wordpress.com/2009/05/18/ie8-rendering-modes-theory-and-practice/. This article provides detailed information about IE8's rendering modes and how to troubleshoot rendering differences.

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