Assets organize content in a document. Assets are called by the main template (e.g. default.master.tpl) which renders the content currently stored in them. Assets are managed with code via plugins or the theme hooks file.

Default assets

Vanilla uses these assets by default: Head, Content, Panel, and Foot. You cannot rely on every theme having a Panel, which is typically used as a sidebar. The Content asset is required, because it is where the view is rendered. You can, however, assign it additional content.

Using assets

You can create your own arbitrary assets in your templates and simply add content to them using Gdn::controller()->addAsset('AssetName', $content, 'ContentName'). This is a great strategy for creating flexible themes that are easily customized by rearranging assets in the default.master.tpl file.

A common scenario is using modules to add content to an asset. (Note: In plugin hooks, you will typically be using $sender in place of Gdn::controller() since the sender is the controller).

You can set the sort order in which content in an asset is displayed via the config. Use a key like Modules.{Application}.{Asset} (e.g. Modules.Vanilla.Content) to define an array of ContentName values that you used when calling addAsset(). See $ModuleSortContainer in Gdn_Controller.

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