// Generated by scripts/generate-showcase.mjs. Do not edit directly. page TreeViewDetail { layout = "showcase" state playground_title = ctx.url.searchParams.get("pg_title") ?? "Project files" state playground_description = ctx.url.searchParams.get("pg_description") ?? "" state playground_items = JSON.parse(ctx.url.searchParams.get("pg_items") ?? "[{\"value\":\"src\",\"label\":\"src\",\"children\":[{\"value\":\"pages\",\"label\":\"pages\",\"children\":[{\"value\":\"home\",\"label\":\"index.wrn\"}]},{\"value\":\"styles\",\"label\":\"styles.css\"}]},{\"value\":\"readme\",\"label\":\"README.md\"}]") state playground_valueKey = ctx.url.searchParams.get("pg_valueKey") ?? "value" state playground_labelKey = ctx.url.searchParams.get("pg_labelKey") ?? "label" state playground_defaultExpanded = JSON.parse(ctx.url.searchParams.get("pg_defaultExpanded") ?? "[\"src\"]") state playground_selected = ctx.url.searchParams.get("pg_selected") ?? "" state playground_size = ctx.url.searchParams.get("pg_size") ?? "default" state playground_color = ctx.url.searchParams.get("pg_color") ?? "primary" state playground_class = ctx.url.searchParams.get("pg_class") ?? "" seo { title = "Tree View" description = "Theme-aware, responsive tree view component." } view {
Base component

Tree View

Theme-aware, responsive tree view component.

10 props1 slots4 outputsTheme readyResponsive
Interactive playground

Configure Tree View

Change any prop and inspect the server-rendered component immediately.

Live preview
Component code
page TreeViewExample {
  state items = [
  {
    "value": "src",
    "label": "src",
    "children": [
      {
        "value": "pages",
        "label": "pages",
        "children": [
          {
            "value": "home",
            "label": "index.wrn"
          }
        ]
      },
      {
        "value": "styles",
        "label": "styles.css"
      }
    ]
  },
  {
    "value": "readme",
    "label": "README.md"
  }
]
  state defaultExpanded = [
  "src"
]
  view {
    <TreeView
      title="Project files"
      items="{items}"
      defaultExpanded="{defaultExpanded}"
    />
  }
}
Event outputInteract with the preview to inspect the typed payload.
Component props10 controls
Live examples

Designed for real product surfaces

Compare configurations and resize the browser to check responsive behavior.

Recommended

Production default

Balanced spacing, hierarchy, and content for the most common product workflow.

01
Live preview
Component usage.wrn
page TreeViewExample {
  state items = [
  {
    "value": "src",
    "label": "src",
    "children": [
      {
        "value": "pages",
        "label": "pages",
        "children": [
          {
            "value": "home",
            "label": "index.wrn"
          }
        ]
      },
      {
        "value": "styles",
        "label": "styles.css"
      }
    ]
  },
  {
    "value": "readme",
    "label": "README.md"
  }
]
  state defaultExpanded = [
  "src"
]
  view {
    <TreeView
      title="Project files"
      items="{items}"
      defaultExpanded="{defaultExpanded}"
    />
  }
}
Dense UI

Compact application

A tighter variation for dashboards, side panels, tables, and operational interfaces.

02
Live preview
Component usage.wrn
page TreeViewExample {
  state items = [
  {
    "value": "src",
    "label": "src",
    "children": [
      {
        "value": "pages",
        "label": "pages",
        "children": [
          {
            "value": "home",
            "label": "index.wrn"
          }
        ]
      },
      {
        "value": "styles",
        "label": "styles.css"
      }
    ]
  },
  {
    "value": "readme",
    "label": "README.md"
  }
]
  state defaultExpanded = [
  "src"
]
  view {
    <TreeView
      title="Project files"
      items="{items}"
      defaultExpanded="{defaultExpanded}"
    />
  }
}
Extended

Rich configuration

A more expressive variation using additional data, stronger emphasis, and optional states.

03
Live preview
Component usage.wrn
page TreeViewExample {
  state items = [
  {
    "value": "src",
    "label": "src",
    "children": [
      {
        "value": "pages",
        "label": "pages",
        "children": [
          {
            "value": "home",
            "label": "index.wrn"
          }
        ]
      },
      {
        "value": "styles",
        "label": "styles.css"
      }
    ]
  },
  {
    "value": "readme",
    "label": "README.md"
  }
]
  state defaultExpanded = [
  "src"
]
  view {
    <TreeView
      title="Project files"
      items="{items}"
      defaultExpanded="{defaultExpanded}"
    />
  }
}
Component outputs

Receive every typed component output

Use declarative output handlers in .wrn files or register a direct output handler from JavaScript. The canonical API exposes payload and does not require event.detail.

@selectFires when an item, option, card, or result is selected.
@toggleFires when the component changes between open and closed or on and off states.
@expandFires when the component emits the expand event.
@collapseFires when the component emits the collapse event.
Declarative handlers.wrn
<TreeView
  @select='console.log(payload)'
  @toggle='console.log(payload)'
  @expand='console.log(payload)'
  @collapse='console.log(payload)'
/>
Direct output handlers.js
import { registerOutputHandler } from "@wrnexus/csr/outputs"

const component = document.querySelector("[data-ui-component=\"TreeView\"], [data-component=\"TreeView\"]")

if (component) registerOutputHandler(component, "select", (payload) => {
  console.log("select", payload)
})

if (component) registerOutputHandler(component, "toggle", (payload) => {
  console.log("toggle", payload)
})

if (component) registerOutputHandler(component, "expand", (payload) => {
  console.log("expand", payload)
})

if (component) registerOutputHandler(component, "collapse", (payload) => {
  console.log("collapse", payload)
})
Component API

Props and configuration

All content and behavior shown above is supplied through these props and slots.

PropTypeDefaultRequired
titlestring"Tree View"No
descriptionstring""No
itemsunknown[][]No
valueKeystring"value"No
labelKeystring"label"No
defaultExpandedunknown[][]No
selectedstring""No
sizestring"default"No
colorstring"primary"No
classstring""No
} }