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jsfprimefacesliferayjsf-2.2

Javascript file included multiple times with JSF / Liferay 6.2

I'm running with Liferay 6.2 and JSF 2.2.12

I have two custom portlets (using Primefaces). My portlets import Javascript resources using <h:head />. Those portlets are displayed on the same page.

On my staging environment primefaces.js is included once in the rendered view : 

<script src="https://example.com/group/my-site/url?p_p_id=portletone_WAR_portletone&...javax.faces.resource=primefaces.js...">

Why do I get two <script> in production environment :

<script src="https://example.com/group/my-site/url?p_p_id=portletone_WAR_portletone&...javax.faces.resource=primefaces.js...">
<script src="https://example.com/group/my-site/url?p_p_id=portlettwo_WAR_portlettwo&...javax.faces.resource=primefaces.js...">

(same observation with jquery.js)

Solution

  • This is due to Liferay Parallel Rendering. In order to disable parallel rendering, add the following property to portal-ext.properties 

    layout.parallel.render.enable=false

    All credit goes to Neil Griffin on the Liferay Forums: https://community.liferay.com/fr/forums/-/message_boards/message/20947470#_com_liferay_message_boards_web_portlet_MBPortlet_message_36195975