Container

A centered content box that constrains its content to a comfortable reading width. Like every block in the library, it is a second authoring surface, not a second renderer: the canvas preview and the front end are both produced by the Container element — the same server-side code as the page builder — so the output is identical either way.

Options

Select the block and open the Settings (block) tab; the whole sidebar is generated from the element's option schema, so it stays in step with the page builder.

Option	What it does
Background (background)	A solid colour, gradient or image behind the box.
Width (container_width)	The maximum width the content is constrained to.
Padding (padding_top, padding_bottom)	Vertical space inside the box.
Min height (min_height)	A minimum height for the box.

The block also opts into WordPress Margin / Padding (and, where it makes sense, alignment), which inherit the site's design system from theme.json.

Inner content

Container is a container: you nest other blocks inside it in the editor, and it wraps them. The upOptions object stores the container's own styling; the content comes from the blocks you place within.

Sample content

The demo above is a centered box with a tinted background, holding a heading and a paragraph:

<!-- wp:unysonplus/container {"upOptions":{"background":{"color":{"value":{"custom":"#ecfeff"}}}}} -->
  <!-- wp:heading --> … <!-- /wp:heading -->
  <!-- wp:paragraph --> … <!-- /wp:paragraph -->
<!-- /wp:unysonplus/container -->

Set the background with the block's background picker rather than typing the object by hand.

The container element

The block and the page builder's Container element are two doors onto the same code. Its full option, markup and behaviour reference is documented there.