ui:定义为rendered ="false"属性仍在渲染 [英] ui:define with rendered="false" attribute still rendering
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问题描述
<ui:define name="description" rendered="false">
<meta name="description" content="do not render" />
</ui:define>
我在xhtml页面中使用此代码，当我运行该应用程序时，元描述仍在呈现.我想根据某些条件使用元描述标签.主版面:
i'm using this code in my xhtml page, when i run the app, meta description is still rendering. i want to use meta description tag depending on some conditions. master layout:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html">
<h:head>
<ui:insert name="description" />
</h:head>
...........
</html>
网页:
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
template="/templates/masterLayout.xhtml">
<ui:define name="description" rendered="false">
<meta name="description" content="do not render" />
</ui:define>
...........
</ui:composition>
推荐答案
不支持rendered属性.任何不受支持的属性都将被忽略.
The <ui:define> is a taghandler which runs during view build time, not an UIComponent which runs during view render time. It does therefore not support the rendered attribute. Any unsupported attribute is just plain ignored.
改用 <ui:fragment> . /p>
Use <ui:fragment> instead.
<ui:define name="description">
<ui:fragment rendered="false">
<meta name="description" content="do not render" />
</ui:fragment>
</ui:define>
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