How to Fix Missing Font Icons When Using Font Awesome in JSF?

Integrating Font Awesome into JSF and Resolving Missing Font Issue

When incorporating Font Awesome into JSF applications using the tag, you may encounter an issue where the browser fails to locate the font files referenced in the CSS file. Instead of displaying the expected icons, empty squares appear.

Cause:

By default, the Font Awesome CSS file references font files through a relative path like "../fonts/". However, when using the tag with the library attribute, JSF requests the CSS file on a different path, causing the font references to fail.

Solution:

To resolve this issue, edit the Font Awesome CSS file and replace the relative font references with EL expressions using the #{resource} mapping:

<code class="css">@font-face {
  font-family: 'FontAwesome';
  src: url("#{resource['font-awesome:fonts/fontawesome-webfont.eot']}&amp;v=4.3.0");
  ...
}</code>

Additional Considerations:

• Make sure to restart the server after modifying the CSS file.
• If you encounter JSF1091 warnings in server logs, add the necessary mime-type mappings to web.xml to resolve the issue.
• OmniFaces UnmappedResourceHandler can also be utilized as an alternative to manually editing the CSS file.

References:

• [How to use Font Awesome from webjars.org with JSF](https://stackoverflow.com/questions/28381776/how-to-use-font-awesome-from-webjars-org-with-jsf)

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