---
title: 默认展开所有节点
order: 7
---

给组件添加`defaultExpandAll`属性，可以默认展开所有节点

> 仅限首次渲染`Tree`时生效，后续添加节点不会默认展开

```vdt
import Tree from 'kpc/components/tree';

<Tree
    defaultExpandAll
    data={{ [
        {
            label: 'First floor-1',
            children: [
                {
                    label: 'Second floor-1.1',
                    children: [
                        {
                            label: 'Third floor-1.1.1'
                        }
                    ]
                }
            ]
        },
        {
            label: 'First floor-2',
            key: '2',
            children: [
                {
                    label: 'Second floor-2.1',
                    children: [
                        {
                            label: 'Third floor-2.1.1',
                            key: '2-1' 
                        },
                        {
                            label: 'Third floor-2.1.2'
                        }
                    ]
                },
                {
                    label: 'Second floor-2.2',
                    disabled: true,
                    children: [
                        {
                            label: 'Third floor-2.2.1'
                        }
                    ]
                }
            ]
        }
    ] }}
/>
```