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Preventing Server-side CSS File Caching with Apache
When developing websites, it is crucial to ensure that visitors are accessing the latest versions of CSS files to prevent caching issues. This article addresses the question of whether Apache caches resources and provides a solution to prevent it from doing so, especially when encountering a scenario where CSS changes are not reflected in the browser despite reloading the page.
Is it true that Apache caches resources?
Yes, Apache can cache resources such as CSS files to improve page load times. This behavior is primarily controlled by the mod_expires module, which specifies expiration dates for different file types. To check if Apache is caching CSS files on your server, you can use the following steps:
ExpiresActive On ExpiresDefault "access plus 0 seconds" ExpiresByType text/css "access plus 0 seconds"
How to prevent Apache from caching CSS files?
To prevent Apache from caching CSS files, you can set the expiration date for CSS files to a short duration, such as zero seconds. By doing this, the browser will always fetch the latest version of the CSS file from the server instead of using the cached version. Here's how you can do it:
ExpiresByType text/css "access plus 0 seconds"
Alternatively, you can use a query string to force the browser to reload the CSS file every time it is requested. For example, you can change your CSS link to the following:
<link rel="stylesheet" type="text/css" href="style.css?v=1" />
When you update the CSS file, increment the value of the v parameter to force a reload.
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