What is the reason behind JSF using the file extension .jsf and GET parameter ln=js for delivering JavaScript resources?

Take this as an example:

<h:outputScript library="js" name="foo.js" />

This can be transformed into:

<script type="text/javascript" 
   src="/welcomepage/javax.faces.resource/foo.js.jsf?ln=js"></script>

Pay attention to the .jsf?ln=js part.

But why is that necessary?

Answer №1

I believe that the .jsf extension triggers the JSF servlet to manage which resources are being downloaded, allowing for controlled library versioning.

For more information, please visit: Understanding the purpose and usage of the JSF resource library

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