Angular TreeView - items
An array of items displayed by the widget.
The TreeView works with object collections that can have a plain or hierarchical structure. Depending on the structure, the objects should provide different data fields. Specify the dataStructure option to notify the TreeView of the used structure and refer to the option's description for information on the required fields.
If you need to update the widget items, reassign the entire items array as shown in the following example:
treeViewInstance.option('items', newItems);
As an alternative to items, you can use the dataSource option. It accepts the DataSource object, whose underlying stores provide an API that allows you to update individual items without reassigning the entire item collection.
component
An alias for the template property specified in React. Accepts a custom component. Refer to Using a Custom Component for more information.
expanded
Specifies whether or not the tree view item is displayed expanded.
This field makes sense no matter whether a custom template or the default one is used.
See Also
hasItems
Specifies whether or not the tree view item has children.
This field is used when the virtual mode is enabled. It can hold a Boolean value or a function that returns a Boolean value.
icon
Specifies the tree view item's icon.
This option accepts one of the following:
- The icon's URL
- The icon's name if the icon is from the DevExtreme icon library
- The icon's CSS class if the icon is from an external icon library (see External Icon Libraries)
- The icon in the Base64 format
- The icon in the SVG format. Ensure that the source is reliable.
items
Specifies nested tree view items.
Nested items should have the same structure as the first-level items.
See Also
parentId
Holds the key of the parent item.
This field makes sense no matter whether a custom template or the default one is used.
render
An alias for the template property specified in React. Accepts a rendering function. Refer to Using a Rendering Function for more information.
selected
Specifies whether or not the tree view item is displayed selected.
This field makes sense no matter whether a custom template or the default one is used.
See Also
template
Specifies a template that should be used to render this item only.
The following types of the specified value are available.
- Assign a string containing the name of the required template.
- Assign a jQuery object of the template's container.
- Assign a DOM Node of the template's container.
- Assign a function that returns the jQuery object or a DOM Node of the template's container.
See Also
If you have technical questions, please create a support ticket in the DevExpress Support Center.