# Create a `wa-tree` component

Generated wrapper for the Web Awesome `wa-tree` component. When used as
a Shiny input, `input$<input_id>` reflects the component's current
semantic `selectedItemIds` state. The Shiny value is returned as a
character vector. For stable Shiny selection values, selectable
descendant `wa-tree-item` elements should have DOM `id` attributes.
Generated from Web Awesome metadata.

## Usage

``` r
wa_tree(
  input_id,
  ...,
  class = NULL,
  style = NULL,
  dir = NULL,
  lang = NULL,
  selection = NULL,
  collapse_icon = NULL,
  expand_icon = NULL
)
```

## Arguments

- input_id:

  Shiny input id for the component. This is also used as the rendered
  DOM `id` attribute.

- ...:

  Child content for the component's default slot.

- class:

  Optional CSS class string.

- style:

  Optional inline CSS style string.

- dir:

  String. Optional Web Awesome attribute.

- lang:

  String. Optional Web Awesome attribute.

- selection:

  Enumerated string. Allowed values: `leaf`, `multiple`, `single`.
  Default: `single`. The selection behavior of the tree. Single
  selection allows only one node to be selected at a time. Multiple
  displays checkboxes and allows more than one node to be selected. Leaf
  allows only leaf nodes to be selected.

- collapse_icon:

  The icon to show when the tree item is collapsed. Works best with
  `<wa-icon>`.

- expand_icon:

  The icon to show when the tree item is expanded. Works best with
  `<wa-icon>`.

## Value

An HTML tag for the component.

## Shiny Bindings

`input$<input_id>` reflects the component's current semantic
`selectedItemIds` state. The Shiny value is returned as a character
vector.