How to Integrate Font Awesome with JSF and Resolve Font File Issues?

Integrating Font Awesome with JSF: Resolving Font File Issues

When incorporating Font Awesome into JSF, you may encounter an issue where the browser displays empty squares instead of icons. This error occurs when the CSS file references font files using relative paths that fail to resolve due to the modified path used by JSF for resource handling.

Understanding the Issue

The default Font Awesome CSS files reference font files using relative paths like ../fonts/. However, when you include the CSS file in JSF using , JSF assigns a special /javax.faces.resource/* prefix to the resource to invoke the JSF resource handler.

Solution: Modifying the CSS References

To resolve the issue, you need to edit the CSS file and replace the relative font file references with absolute references using the #{resource} EL mapping and appropriate library and resource names. For example, in a structure like:

WebContent
 |-- resources
 |    `-- font-awesome
 |         |-- css
 |         |    |-- font-awesome.css
 |         |    `-- font-awesome.min.css
 |         `-- fonts
 |              |-- fontawesome-webfont.eot
 |              |-- fontawesome-webfont.svg
 |              |-- fontawesome-webfont.ttf
 |              |-- fontawesome-webfont.woff
 |              `-- fontawesome-webfont.woff2

Edit the CSS file as follows:

<code class="css">@font-face {
  font-family: 'FontAwesome';
  src: url("#{resource['font-awesome:fonts/fontawesome-webfont.eot']}&v=4.3.0");
  src: url("#{resource['font-awesome:fonts/fontawesome-webfont.eot']}&#iefix&v=4.3.0") format('embedded-opentype'),
       url("#{resource['font-awesome:fonts/fontawesome-webfont.woff2']}&v=4.3.0") format('woff2'),
       url("#{resource['font-awesome:fonts/fontawesome-webfont.woff']}&v=4.3.0") format('woff'),
       url("#{resource['font-awesome:fonts/fontawesome-webfont.ttf']}&v=4.3.0") format('truetype'),
       url("#{resource['font-awesome:fonts/fontawesome-webfont.svg']}&v=4.3.0#fontawesomeregular") format('svg');
  font-weight: normal;
  font-style: normal;
}</code>

Mime Type Mappings and JSF1091 Warnings

You may also encounter JSF1091 warnings if certain file types don't have mime type mappings. For example, SVG and WOFF2 files. To resolve this, add the following mime mappings to web.xml:

<code class="xml"><mime-mapping>
    <extension>eot</extension>
    <mime-type>application/vnd.ms-fontobject</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>otf</extension>
    <mime-type>font/opentype</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>svg</extension>
    <mime-type>image/svg+xml</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>ttf</extension>
    <mime-type>application/x-font-ttf</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>woff</extension>
    <mime-type>application/x-font-woff</mime-type>
</mime-mapping>
<mime-mapping>
    <extension>woff2</extension>
    <mime-type>application/x-font-woff2</mime-type>
</mime-mapping></code>

Alternative Approach with OmniFaces

If you're using OmniFaces, you can install the OmniFaces UnmappedResourceHandler and reconfigure the FacesServlet mapping to automatically handle missing mime type mappings. However, you need to reference the font CSS file without using the library attribute in this case:

<code class="xml"><outputstylesheet name="font-awesome/css/font-awesome.min.css"></outputstylesheet></code>

Additional Resources

• [How to use Font Awesome from webjars.org with JSF](https://stackoverflow.com/questions/21419280/how-to-use-font-awesome-from-webjars-org-with-jsf)

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