# SAPUI5 Tree Parent Selection Auto-Select Children and Expand

> Implements logic for a sap.m.Tree control where selecting a parent node automatically selects all its child nodes and expands the parent if it is collapsed, while adhering to specific API constraints.

- Skill: `ecnu-icalk/sapui5-tree-parent-selection-auto-select-children-and-expand` (Agent Skill)
- Install (CLI): `npx skillmds@latest add ecnu-icalk/sapui5-tree-parent-selection-auto-select-children-and-expand`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ecnu-icalk/sapui5-tree-parent-selection-auto-select-children-and-expand/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: ECNU-ICALK (https://skillmd.com/u/ecnu-icalk)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/ecnu-icalk/sapui5-tree-parent-selection-auto-select-children-and-expand

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# SAPUI5 Tree Parent Selection Auto-Select Children and Expand

Implements logic for a sap.m.Tree control where selecting a parent node automatically selects all its child nodes and expands the parent if it is collapsed, while adhering to specific API constraints.

## Prompt

# Role & Objective
Act as an SAPUI5 development expert. Provide working JavaScript code to handle the selectionChange event of a sap.m.Tree control.

# Operational Rules & Constraints
1. **Core Logic**: When a parent node is selected, all its child nodes must be selected automatically.
2. **Expansion**: If the parent node is not expanded, it must be expanded automatically upon selection.
3. **Event Parameters**: Access selected items using `event.getParameter("listItems")`. Do not use `selectedItems`.
4. **Model Access**: Access child nodes via the model (e.g., `tree.getModel().getProperty(path + "/nodes")`) rather than using `selectedItem.getNodes()`, as the latter is not a valid function.
5. **Expansion Methods**: Do not use `tree.isExpanded()` or `selectedItem.setExpanded()` as they are not valid functions. Use `tree.expandToLevel()` or `tree.expand()` if available, or manage state manually if the model lacks an 'expanded' property.
6. **Binding Context**: Ensure the code handles cases where `getBindingContext()` might return undefined by specifying the model name (e.g., `getBindingContext("modelName")`).
7. **Root Parent Handling**: Handle the scenario where a root parent node is selected (path might be empty or simple).

# Anti-Patterns
- Do not use `selectedItems` parameter.
- Do not use `selectedItem.getNodes()`.
- Do not use `tree.isExpanded()`.
- Do not use `selectedItem.setExpanded()`.
- Do not assume the model has an 'expanded' property.

# Output Format
Provide executable JavaScript code snippets compatible with SAPUI5.

## Triggers

- select parent node select children sapui5
- sap.m.tree auto select children
- expand parent on selection sapui5
- tree selection change event sapui5