jsf - 富:clientId,富:component and rich:element?有什么区别

Question

我的意思是这三个富人的论点:

#{rich:clientId('id')}
#{rich:element('id')}
#{rich:component('id')}

例如在这些方法调用(actionListener)中:

 <a4j:support event="onchange" ajaxSingle="true"
    actionListener="#{Bean.actionReset('#{rich:clientId('id')}')}"              
    oncomplete="jsFunction(this.value).text;" />

Answer 1

您可以查看 documentation RichFaces 以获取差异:

丰富的:clientId

The rich:clientId('id') function returns the client identifier related to the passed component identifier ('id'). If the specified component identifier is not found, null is returned instead.

示例:您有一个带有 id="myId" 的组件在您的页面中。该组件不在结构的顶层。 rich:clientId(id)将返回生成的组件的 HTML id。这可能类似于 myForm:myPanel:myId .

丰富:组件

The rich:component('id') function is equivalent to the RichFaces.$('clientId') code. It returns the client object instance based on the passed server-side component identifier ('id'). If the specified component identifier is not found, null is returned instead. The function can be used to get an object from a component to call a JavaScript API function without using the component.

此方法将返回一个 JavaScript 对象，您可以在该对象上调用一些 RichFaces 函数。这取决于您引用的组件。

丰富:元素

The rich:element('id') function is a shortcut for the equivalent document.getElementById(#{rich:clientId('id')}) code. It returns the element from the client, based on the passed server-side component identifier. If the specified component identifier is not found, null is returned instead.

此方法将返回给定组件 ID 的 HTML dom 元素。