react-expandable-treeview

react-expandable-treeview

A simple and fully customizable tree view React component

Check out the live demo!

Quick start

• Install the package using yarn add react-expandable-treeview or npm install react-expandable-treeview

• Import the TreeView component

import TreeView from 'react-expandable-treeview';

• Define the data you want to pass to TreeView. It should be a recursive array of elements with an unique id and a children optional prop for children elements. Each one of them will be rendered as a tree node. Here is the base object model:

    {
        id: 0,
        children: [
            //...all the children elements*/
        ],
        // ...other user-defined object properties
    }

And an example of the data prop o be passed to TreeView component.

const data = [
    {
        id: 0,
        children: [
            {
                id: 1
            },
            {
                id: 2
            }
        ],
        id: 3,
        children: [
            {
                id: 4,
                children: [
                    {
                        id: 5
                    }
                ]
            }
        ]
    }
]

• The TreeView component has two required props: data and renderNode. The renderNode prop is a function that allows you to represent the nodes of the tree as fully customizable React components: you can define their structure. In the example we add a custom label attribute to our data elements and we want it to be rendered.

const data = [
    {
        id: 0,
        label: 'A Father'
        children: [
            {
                id: 1,
                label: 'A Son'
            },
            {
                id: 2,
                label: 'Another Son'
            }
        ],
        id: 3,
        label: 'Another Father',
        children: [
            {
                id: 4,
                children: [
                    {
                        id: 5,
                        label: 'Yet Another Son',
                    }
                ]
            }
        ]
    }
]

Now we can render the component inside our application:

<TreeView
    data={data}
    renderNode={({ label }) => <div>{label}</div>}
/>

Props

Here are the props you can pass to TreeView.

Prop Name	Type	Is Required	Default Value	Description
data	array	required	-	The data to display.
renderNode	func	required	-	The node render function
lineColor	string	optional	'#4B6DAA'	The color of the tree lines
lineWidth	number	optional	0.5	Thickness of the tree lines
lineStyle	string	optional	'solid'	Style of the tree lines. Can be 'solid', 'dotted', etc. (all the possible values for 'border-style' CSS attribute)
lineAlpha	number	optional	0.4	The alpha value of the tree lines
expandButtonColor	string	optional	'#4B6DAA'	The color of the expand button
nodeSize	number	optional	20	The size of the tree leaf icons