react-lazy-tree

react-lazy-tree

Recursively render tree data structures.

Control tree node markup, content and style.

Render lazily or greedily.

Specify vertical animation, CSS classes, initial active node, and more.

Demo

Please see demo site and example code.

Installation

npm install --save react-lazy-tree

Usage

import ReactLazyTree from 'react-lazy-tree'

...

<ReactLazyTree {...{
    data: tree,
    
    mapInitialActiveNode: (node) => {
        return node.label === 'Dresses';
    },

    mapListClassName: ({ depth }) => {
        const exampleDepth = `example--depth-${depth}`;

        return `example ${exampleDepth}`;
    },

    mapListItemClassName: ({ isOnActivePath }) => {
        const modifier = isOnActivePath ? 'expanded' : 'contracted';
        const nodeIcon = `example__node--${modifier}`;

        return `example__node ${nodeIcon}`;
    },

    mapNodeContent: ({ depth, isActiveNode }) => {
        const labelDepth = `example__label--${depth}`;
        const isActive = isActiveNode ? 'example__label--active' : '';
        const className = `example__label ${labelDepth} ${isActive}`;
        
        return (
            <Label {...{
                className,
                text: node.label
            }}/>
        );
    },

    onActiveNodeChanged: activeNodeChangedHandler
}}/>

Props API

foo

bar

data - Tree data structure, or a collection of tree data structures.

• Type: Object | array
• Required: Yes

mapNodeContent - Specify content, markup, and style for tree node presentation.

• Type: Function
• Required: Yes
• Parameters:
  • depth: Number
  • index: Number
  • isActiveNode: Boolean
  • isLeafNode: Boolean
  • isOnActivePath: Boolean
  • node: Object
• Return Type: String | JSX
• Notes: Parameters are named (i.e. properties of an object).

childrenPropertyName - Specify data node children property name.

• Type: String
• Required: No
• Default: children

mapListClassName - Specify HTML list (UL) class names.

• Type: Function
• Required: No
• Parameters:
  • depth: Number
  • isOnActivePath: Boolean
  • node: Object
• Return Type: String
• Notes: Parameters are named (i.e. properties of an object).

mapListItemClassName - Specify HTML list-item (LI) class names.

• Type: Function
• Required: No
• Parameters:
  • depth: Number
  • isActiveNode: Boolean
  • isLeafNode: Boolean
  • isOnActivePath: Boolean
  • node: Object
• Return Type: String
• Notes: Parameters are named (i.e. properties of an object).

mapInitialActiveNode - Specify a node that should be active initially.

• Type: Function
• Required: No
• Parameters:
  • node: Object
• Return Type: Boolean
• Notes: Returns first match. Multiple active nodes not yet supported.

onActiveNodeChanged - Handle active node changes as a result of user interaction.

• Type: Function
• Required: No
• Parameters:
  • activePath: String
  • depth: Number
  • e: Object
  • index: Number
  • node: Object
• Notes: Parameters are named (i.e. properties of an object).

interactiveStartDepth - Specify at what depth the rendered tree should become interactive.

• Type: Number
• Required: No
• Default: 0

shouldLazyRender - Specify should tree nodes be rendered when becoming visible or at mount time.

• Type: Boolean
• Required: No
• Default: true

shouldShowAllNodes - Specify the entire tree should be rendered initially.

• Type: Boolean
• Required: No
• Default : false
• Notes: Overrides shouldLazyRender

verticalAnimationConfig - Specify CSS transition duration and timing.

• Type: Object
• Required: No
• Properties:
  • durationInMs: Number
  • timing: Keyword | Function
• Default:
  • durationInMs: 300
  • timing: ease-in

Support

Please open an issue.

Development

git clone https://github.com/ethanselzer/react-lazy-tree.git
cd react-lazy-tree
npm install

See available commands:

npm run

Contributing

Please contribute using Github Flow. Create a branch, add commits, and open a pull request.