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JSF Resource Ordering
08 October 2015

JSF's h:outputStylesheet and h:outputScript elements have an odd way of ordering linked resources. For example if you do not set the target element of an h:outputScript to body the JavaScript is output before the CSS. This is irrespective of the order given in a template.

I needed to put an <!--[if lte IE 7]> [...] <![endif]--> element into a template. OmniFaces' o:conditionalComment is a great element for this; but the <!--[if lte IE 7]> [...] <![endif]--> condition was being output before the main CSS.

To fix this resource loading problem use a plain old HTML link elements instead of JSF h:outputStylesheet elements. Use this element with the HTML link elements having #{resource['libs:reset.css']} as there href.

<link rel="stylesheet" href="#{resource['libs:reset.css']}" />
<link rel="stylesheet" href="#{resource['css:login.css']}" />
<o:conditionalComment if="lte IE 7" >
     <link rel="stylesheet" href="#{resource['css:login-ie7.css']}" />
</o:conditionalComment>

Will then output:

<link rel="stylesheet" href="/javax.faces.resource/reset.css?ln=libs" />
<link rel="stylesheet" href="/javax.faces.resource/login.css?ln=css" />
<!--[if lte IE 7]>
     <link rel="stylesheet" href="/javax.faces.resource/login-ie7.css?ln=css" />
<![endif]-->

Which is the desired resource ordering.

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