apex:facet Component

In Visualforce, the apex:facet component allows developers to control the rendering of certain aspects of a Visualforce page without having to create custom components. The apex:facet component is typically used in conjunction with custom Visualforce components to create more dynamic and flexible pages.

Syntax

The syntax for using the apex:facet component is as follows:

<apex:component>
    <!-- Define the component -->
    <apex:facet name="facetName">
        <!-- Define the content to be rendered for the specified facet -->
    </apex:facet>
</apex:component>

Here, "facetName" is the name assigned to the facet, and the content defined within the apex:facet tags is what will be rendered for that facet.

Example

Consider the following example:

<apex:page>
    <h1>Welcome to My Visualforce Page</h1>
    <apex:outputPanel>
        <apex:facet name="header">
            <h2>This is the Header</h2>
        </apex:facet>
        <apex:facet name="footer">
            <h2>This is the Footer</h2>
        </apex:facet>
        <p>This is the main content of the page.</p>
    </apex:outputPanel>
</apex:page>

In this example, an apex:outputPanel component is used to define the structure of the page, and two apex:facet components are defined inside the apex:outputPanel component. One apex:facet is named "header", and the other is named "footer". The content defined within these facets will be rendered at the top and bottom of the page, respectively.

Explanation

The apex:facet component allows developers to define named sections within a custom component that can be controlled by the page developer. When a custom component is used within a page, the page developer can define the content to be rendered for each facet, which gives the page a more dynamic and flexible structure. The content defined within a facet is only rendered when the facet is defined within the containing component.

Use

The apex:facet component is typically used in conjunction with custom Visualforce components to create more dynamic and flexible pages. It allows for developers to define sections within a custom component that can be controlled by the page developer, without having to create separate components for each section.

Important Points

• The apex:facet component is used within custom Visualforce components to define named sections that can be controlled by the page developer.
• The content defined within an apex:facet component is only rendered when the facet is defined within the containing component.
• The apex:facet component is typically used in conjunction with custom Visualforce components to create more dynamic and flexible pages.

Summary

The apex:facet component in Visualforce allows developers to define and control named sections within custom components, and is typically used in conjunction with custom components to create more dynamic and flexible pages. The content defined within a facet is only rendered when the facet is defined within the containing component.