gistfile1.gs

config/ApplicationResources.groovy:
modules = {
    application {
        resource url:'js/application.js'
    }
    xyz {
	resource url:'js/xyz.js'
    }
}


views/layout/main.gsp:
...
  	<g:javascript library="xyz"/>
	<g:layoutHead/>
	<r:layoutResources />
    </head>


views/something/edit.gsp:
...
  	<g:javascript library="xyz"/>
	<r:layoutResources />
  	<script>
	    $(document).ready(function() {
  		//some function call from xyz.js
	    });
	</script>
    </head>


Error:
"Error processing GroovyPageView: Error executing tag <g:javascript>: Cannot add resource with disposition [defer] to this request - that disposition has already been rendered."