superset2/docs/developer_docs/components/ui/tree.mdx

---
title: Tree
sidebar_label: Tree
---

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import { StoryWithControls } from '../../../src/components/StorybookWrapper';

# Tree

The Tree component is used to display hierarchical data in a tree structure. It allows for features such as selection, expansion, and drag-and-drop functionality.

## Live Example

<StoryWithControls
  component="Tree"
  props={{
  checkable: false,
  defaultExpandAll: false,
  disabled: false,
  draggable: false,
  multiple: false,
  selectable: true,
  showIcon: false,
  showLine: false,
  treeData: [
    {
      title: "parent 1",
      key: "0-0",
      children: [
        {
          title: "parent 1-0",
          key: "0-0-0",
          children: [
            {
              title: "leaf",
              key: "0-0-0-0"
            },
            {
              title: "leaf",
              key: "0-0-0-1"
            },
            {
              title: "leaf",
              key: "0-0-0-2"
            }
          ]
        },
        {
          title: "parent 1-1",
          key: "0-0-1",
          children: [
            {
              title: "leaf",
              key: "0-0-1-0"
            }
          ]
        },
        {
          title: "parent 1-2",
          key: "0-0-2",
          children: [
            {
              title: "leaf",
              key: "0-0-2-0"
            },
            {
              title: "leaf",
              key: "0-0-2-1"
            }
          ]
        }
      ]
    }
  ],
  defaultExpandedKeys: [
    "0-0",
    "0-0-0"
  ]
}}
  controls={[
  {
    name: "checkable",
    label: "Checkable",
    type: "boolean",
    description: "Add a Checkbox before the treeNodes"
  },
  {
    name: "defaultExpandAll",
    label: "Default Expand All",
    type: "boolean",
    description: "Whether to expand all treeNodes by default"
  },
  {
    name: "disabled",
    label: "Disabled",
    type: "boolean",
    description: "Whether disabled the tree"
  },
  {
    name: "draggable",
    label: "Draggable",
    type: "boolean",
    description: "Specifies whether this Tree or the node is draggable"
  },
  {
    name: "multiple",
    label: "Multiple",
    type: "boolean",
    description: "Allows selecting multiple treeNodes"
  },
  {
    name: "selectable",
    label: "Selectable",
    type: "boolean",
    description: "Whether can be selected"
  },
  {
    name: "showIcon",
    label: "Show Icon",
    type: "boolean",
    description: "Controls whether to display the icon node"
  },
  {
    name: "showLine",
    label: "Show Line",
    type: "boolean",
    description: "Shows a connecting line"
  }
]}
/>

## Try It

Edit the code below to experiment with the component:

```tsx live
function Demo() {
  const treeData = [
    {
      title: 'Databases',
      key: 'databases',
      children: [
        { title: 'PostgreSQL', key: 'postgres' },
        { title: 'MySQL', key: 'mysql' },
        { title: 'SQLite', key: 'sqlite' },
      ],
    },
    {
      title: 'Charts',
      key: 'charts',
      children: [
        { title: 'Bar Chart', key: 'bar' },
        { title: 'Line Chart', key: 'line' },
        { title: 'Pie Chart', key: 'pie' },
      ],
    },
  ];
  return <Tree treeData={treeData} defaultExpandAll />;
}
```

## Checkable Tree

```tsx live
function CheckableTree() {
  const [checkedKeys, setCheckedKeys] = React.useState(['postgres']);
  const treeData = [
    {
      title: 'Databases',
      key: 'databases',
      children: [
        { title: 'PostgreSQL', key: 'postgres' },
        { title: 'MySQL', key: 'mysql' },
      ],
    },
    {
      title: 'Charts',
      key: 'charts',
      children: [
        { title: 'Bar Chart', key: 'bar' },
        { title: 'Line Chart', key: 'line' },
      ],
    },
  ];
  return (
    <Tree
      treeData={treeData}
      checkable
      defaultExpandAll
      checkedKeys={checkedKeys}
      onCheck={setCheckedKeys}
    />
  );
}
```

## With Lines and Icons

```tsx live
function LinesAndIcons() {
  const treeData = [
    {
      title: 'Dashboards',
      key: 'dashboards',
      children: [
        { title: 'Sales Dashboard', key: 'sales' },
        { title: 'Marketing Dashboard', key: 'marketing' },
      ],
    },
    {
      title: 'Reports',
      key: 'reports',
      children: [
        { title: 'Weekly Report', key: 'weekly' },
        { title: 'Monthly Report', key: 'monthly' },
      ],
    },
  ];
  return <Tree treeData={treeData} showLine showIcon defaultExpandAll />;
}
```

## Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `checkable` | `boolean` | `false` | Add a Checkbox before the treeNodes |
| `defaultExpandAll` | `boolean` | `false` | Whether to expand all treeNodes by default |
| `disabled` | `boolean` | `false` | Whether disabled the tree |
| `draggable` | `boolean` | `false` | Specifies whether this Tree or the node is draggable |
| `multiple` | `boolean` | `false` | Allows selecting multiple treeNodes |
| `selectable` | `boolean` | `true` | Whether can be selected |
| `showIcon` | `boolean` | `false` | Controls whether to display the icon node |
| `showLine` | `boolean` | `false` | Shows a connecting line |
| `treeData` | `any` | `[{"title":"parent 1","key":"0-0","children":[{"title":"parent 1-0","key":"0-0-0","children":[{"title":"leaf","key":"0-0-0-0"},{"title":"leaf","key":"0-0-0-1"},{"title":"leaf","key":"0-0-0-2"}]},{"title":"parent 1-1","key":"0-0-1","children":[{"title":"leaf","key":"0-0-1-0"}]},{"title":"parent 1-2","key":"0-0-2","children":[{"title":"leaf","key":"0-0-2-0"},{"title":"leaf","key":"0-0-2-1"}]}]}]` | - |
| `defaultExpandedKeys` | `any` | `["0-0","0-0-0"]` | - |

## Import

```tsx
import { Tree } from '@superset/components';
```

---

:::tip[Improve this page]
This documentation is auto-generated from the component's Storybook story.
Help improve it by [editing the story file](https://github.com/apache/superset/edit/master/superset-frontend/packages/superset-ui-core/src/components/Tree/Tree.stories.tsx).
:::