Persisting the Expanded Node State

The MultiSelectTree enables you to define and persist the expanded state of its nodes when the popup TreeView is re-rendered.

Manual Setup

The MultiSelectTree exposes the following options to control the expanded state of its nodes:

• isNodeExpanded ((node: any) => boolean)—Determines if a given node is expanded.
• nodeCollapse (EventEmitter<any>)—Fired when a given node is about to be collapsed.
• nodeExpand (EventEmitter<any>)—Fired when a given node is about to be expanded.

The following example demonstrates how to manually track and control the expanded node state.

Using the Built-In Directive

By default, the built-in kendoMultiSelectTreeExpandable directive persists the expanded nodes based on their hierarchical index.

Suggested Links

• API Reference of the MultiSelectTree
• API Reference of the Expand Directive