元件是較大的擴展功能，可為您的網站產生主要內容。每個元件都有一個或多個「視圖」以控制內容顯示的方式。 Joomla 管理器中還有外加的擴展功能，例如選單、重新導向和擴展管理器。

Components are larger extensions that produce the major content for your site. Each component has one or more "views" that control how content is displayed. In the Joomla administrator there are additional extensions such as Menus, Redirection, and the extension managers.

內容元件 (com_content) 是您用來撰寫文章的元件。它非常靈活，並且擁有最多數量的內建視圖。可以從前端創建和編輯文章，使內容成為用於創建網站內容的最簡單的組件。

聯絡人元件提供了一種為您的網站提供聯絡表單和資訊或建立可用於許多不同目的的複雜目錄的方法。

Joomla! 2.5 offers two search options.

The Basic Search component provides basic search functionality for the information contained in your core components. Many extensions can also be searched by the search component. Help

The Smart Search component offers searching similar to that found in major search engines. Smart Search is disabled by default. If you choose to enable it you will need to take several steps. First, enable the Smart Search Plugin in the plugin manager. Then, if you are using the Basic Search Module replace it with the Smart Search Module. Finally, if you have already created content, go to the Smart Search component in your site administrator and click the Index icon. Once indexing of your content is complete, Smart Search will be ready to use. Help.

新聞推播(com_newsfeeds) 提供了一種組織和呈現動態消息的方法。新聞推播是您在自己的網站上呈現來自其他網站的資訊的一種方式。例如，joomla.org 網站有許多供您可以將其合併到您的網站上的提要。您可以使用選單來顯示單一提要、某個類別中的提要清單或所有提要類別的清單。

會員擴充功能可讓您的網站訪客註冊、登入和登出、變更其密碼和其他資訊以及恢復遺失的密碼。在管理員中，它允許您建立、封鎖和管理會員以及建立會員群組和存取等級。

 請注意，如果您未登入網站，某些會員視圖將不會顯示。

All components are also used in the administrator area of your website. In addition to the ones listed here, there are components in the administrator that do not have direct front end displays, but do help shape your site. The most important ones for most users are

  • Media Manager
  • Extensions Manager
  • Menu Manager
  • Global Configuration
  • Banners
  • Redirect

Media Manager

The media manager component lets you upload and insert images into content throughout your site. Optionally, you can enable the flash uploader which will allow you to to upload multiple images. Help

Extensions Manager

The extensions manager lets you install, update, uninstall and manage all of your extensions. The extensions manager has been extensively redesigned, although the core install and uninstall functionality remains the same as in Joomla! 1.5. Help

Menu Manager

The menu manager lets you create the menus you see displayed on your site. It also allows you to assign modules and template styles to specific menu links. Help

Global Configuration

The global configuration is where the site administrator configures things such as whether search engine friendly urls are enabled, the site metadata (descriptive text used by search engines and indexers) and other functions. For many beginning users simply leaving the settings on default is a good way to begin, although when your site is ready for the public you will want to change the metadata to match its content. Help

Banners

The banners component provides a simple way to display a rotating image in a module and, if you wish to have advertising, a way to track the number of times an image is viewed and clicked. Help


Redirect

The redirect component is used to manage broken links that produce Page Not Found (404) errors. If enabled it will allow you to redirect broken links to specific pages. It can also be used to manage migration related URL changes. Help