Collapsible container

system:details

Expands or collapses child nodes with a clickable summary.

Nodes are written into the body or children of a resource pack card template. Besides their own fields, all nodes share id, style, when, unless and repeat; see Common node fields.

JSON fields

Field	Type	Required	Default	Description
type	Resource ID	yes	—	system:details
summary	String	yes	—	Summary text of the collapsed section.
children	Card node array	yes	—	Child node array.
open	Boolean	no	false	Whether it is expanded by default.

JSON example

{
  "type": "system:details",
  "summary": "Source summary",
  "children": [
    {
      "type": "system:text",
      "text": "{{source_summary}}"
    }
  ]
}

Placed in the body of a card template or the children of a container. Placeholders come from server snapshots and client build events; changing only the JSON does not produce the missing data or business handlers.

Java entry point

com.iafenvoy.system.screen.card.node.container.DetailsNode. This page is based on the Codec in the current 26.1.2 source.