Why are Bootstrap Icons Loading Inconsistently Locally vs. Online?

Bootstrap Icons Loading Inconsistencies: Local vs. Online

This question explores why Bootstrap icons load locally but fail to do so when the website is hosted online. The user presents an HTML snippet where a button with a Bootstrap glyphicon icon displays correctly locally but appears with an incorrect prefix when deployed on Windows Azure.

An investigation reveals that the issue stems from the different file paths the browser attempts to load the icon from. Locally, it correctly loads the file from /Content/fonts/glyphicons-halflings-regular.woff, while online, it tries to load it from /fonts/glyphicons-halflings-regular.woff.

To resolve this, the user notes that they are using standard Bootstrap files and an identical website configuration for both local and online environments. They also provide their CSS bundling code and file structure.

The solution to the problem emerges from a similar issue encountered with MetroUI. It is discovered that bundling the CSS files can disrupt the font loading mechanism in Windows Azure.

Specifically, the original bundle name referenced the /fonts directory at the application root, which did not exist after bundling. Changing the bundle name to accurately reflect the file structure corrected the issue, ensuring that the browser loaded fonts from the correct location both locally and online.

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