unable to apply custom css to primefaces components

In my Java EE application, I am using a ready-made template with CSS and jQuery. All the PrimeFaces components are rendering properly except for the panelGrid control of PrimeFaces 3.2. It is being displayed with a border, but I want it without a border. I have removed all table styling from the CSS of the custom ready-made template, yet the border remains. When I remove the ready-made template, the panelGrid renders perfectly without any border. How can I remove the border and what could be causing this issue?

Edited: xhtml file:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:p="http://primefaces.org/ui">

<h:head>


<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>AP administration panel - A massive administration panel</title>



</h:head>

<h:body>

    <div>
    <h:form>
        <p:panelGrid columns="2" style="border: none">
        <h:outputText value="scrip symbol"/>
        <p:inputText value=""/>
        <p:commandButton value="submit"/>
        </p:panelGrid>

    </h:form>


    </div>




</h:body>

</html>

Answer №1

When customizing PrimeFaces default styles, it is important to use a CSS selector that is at least as strong as the original, or even stronger. The strength of a CSS selector is defined in the W3 CSS specification and can be further understood in this article: Understanding Style Precedence in CSS: Specificity, Inheritance, and the Cascade.

Here are some selectors based on PrimeFaces own CSS that should work:

.ui-panelgrid tr, .ui-panelgrid td {
    border: none;
}

To apply these styles, place them in a separate .css file and include it using <h:outputStylesheet> within the <h:body>, ensuring it comes after PrimeFaces' own styles.

<h:body>
    <h:outputStylesheet name="layout.css" />
    ...
</h:body>

Further Reading:

  • Removing borders from a specific PrimeFaces p:panelGrid
  • Overriding default PrimeFaces CSS with custom styles

Note: If your CSS changes are not being applied, check if the file is being loaded by reviewing the HTTP traffic in your browser's developer tools (press F12 in Chrome/IE9/Firebug) and look for any HTTP 404 errors. When using <h:outputStylesheet>, make sure to place the CSS file in the /resources folder of your web content. For example, you should have a /resources/css/mycss.css file in order to use

<h:outputStylesheet name="css/mycss.css" />
.

Additional Resources:

  • Referencing CSS / JS / image resources in Facelets templates

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