Search results

Getting started with React Dropdown Tree component

14 Apr 2021 / 4 minutes to read

This section explains you about how to create a simple Dropdown Tree component and configure its available functionalities in React.

Dependencies

The following list of dependencies are required to use the Dropdown Tree component in your application.

Copied to clipboard
|-- @syncfusion/ej2-react-dropdowns
    |-- @syncfusion/ej2-base
    |-- @syncfusion/ej2-data
    |-- @syncfusion/ej2-react-base
    |-- @syncfusion/ej2-dropdowns
        |-- @syncfusion/ej2-lists
        |-- @syncfusion/ej2-inputs
        |-- @syncfusion/ej2-navigations
        |-- @syncfusion/ej2-popups
            |-- @syncfusion/ej2-buttons

Installation and configuration

You can use Create-react-app to setup the applications.

To install create-react-app run the following command.

Copied to clipboard
npm install -g create-react-app

Start a new project using create-react-app command as follows

Using Tsx

Copied to clipboard
create-react-app quickstart --scripts-version=react-scripts-ts
cd quickstart

Using Jsx

Copied to clipboard
create-react-app quickstart

cd quickstart

Adding syncfusion packages

All the available Essential JS 2 packages are published in npmjs.com public registry. You can choose the component that you want to install.

To install Dropdown Tree component, use the following command

Copied to clipboard
npm install @syncfusion/ej2-react-dropdowns --save

Adding Dropdown Tree component

Now, you can start adding Dropdown Tree component in the application. For getting started, add the Dropdown Tree component in src/App.tsx file using following code. Add the below code in the src/App.tsx to initialize the Dropdown Tree.

Copied to clipboard
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from "react-dom";

export default class App extends React.Component<{}, {}> {
  public render() {
    return (
       // specifies the tag for render the DropDownTree component
      <DropDownTreeComponent id='dropdowntree'/>
    );
  }
}

ReactDOM.render(<App />, document.getElementById('sample'));
Copied to clipboard
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from "react-dom";
export default class App extends React.Component {
    render() {
        return (
        // specifies the tag for render the DropDownTree component
        <DropDownTreeComponent id='dropdowntree'/>);
    }
}
ReactDOM.render(<App />, document.getElementById('sample'));

Adding CSS reference

Import the Dropdown Tree component required CSS references as follows in src/App.css.

Copied to clipboard
/* import the Dropdown Tree dependency styles */

@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-inputs/styles/material.css";
@import "../node_modules/@syncfusion/ej2-buttons/styles/material.css";
@import "../node_modules/@syncfusion/ej2-navigations/styles/material.css";
@import "../node_modules/@syncfusion/ej2-react-dropdowns/styles/material.css";

Binding data source

The Dropdown Tree component can load the data either from local data sources or remote data services. This can be done using the dataSource property that is a member of the fields property. The dataSource property supports array of JavaScript objects and DataManager. Here, an array of JSON values is passed to the Dropdown Tree component.

Copied to clipboard
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

export default class App extends React.Component<{}, {}> {
  // definining the dataSource
  private data: { [key: string]: Object }[] = [
     {
        nodeId: '01', nodeText: 'Music',
        nodeChild: [
            { nodeId: '01-01', nodeText: 'Gouttes.mp3' }
        ]
     },
     {
        nodeId: '02', nodeText: 'Videos', expanded: true,
        nodeChild: [
            { nodeId: '02-01', nodeText: 'Naturals.mp4' },
            { nodeId: '02-02', nodeText: 'Wild.mpeg' },
        ]
     },
     {
        nodeId: '03', nodeText: 'Documents',
        nodeChild: [
            { nodeId: '03-01', nodeText: 'Environment Pollution.docx' },
            { nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx' },
            { nodeId: '03-03', nodeText: 'Global Warming.ppt' },
            { nodeId: '03-04', nodeText: 'Social Network.pdf' },
            { nodeId: '03-05', nodeText: 'Youth Empowerment.pdf' },
        ]
     },
    ];
    private fields: Object = { dataSource: this.data, value: 'nodeId', text: 'nodeText', child: 'nodeChild' };
  public render() {
    return (
        // specifies the tag for render the DropDownTree component
      <DropDownTreeComponent id="dropdowntree" fields={this.fields} />
    );
  }
}
ReactDOM.render(<App />, document.getElementById('sample'));
Copied to clipboard
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
export default class App extends React.Component {
    constructor() {
        super(...arguments);
        // definining the dataSource
        this.data = [
            {
                nodeId: '01', nodeText: 'Music',
                nodeChild: [
                    { nodeId: '01-01', nodeText: 'Gouttes.mp3' }
                ]
            },
            {
                nodeId: '02', nodeText: 'Videos', expanded: true,
                nodeChild: [
                    { nodeId: '02-01', nodeText: 'Naturals.mp4' },
                    { nodeId: '02-02', nodeText: 'Wild.mpeg' },
                ]
            },
            {
                nodeId: '03', nodeText: 'Documents',
                nodeChild: [
                    { nodeId: '03-01', nodeText: 'Environment Pollution.docx' },
                    { nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx' },
                    { nodeId: '03-03', nodeText: 'Global Warming.ppt' },
                    { nodeId: '03-04', nodeText: 'Social Network.pdf' },
                    { nodeId: '03-05', nodeText: 'Youth Empowerment.pdf' },
                ]
            },
        ];
        this.fields = { dataSource: this.data, value: 'nodeId', text: 'nodeText', child: 'nodeChild' };
    }
    render() {
        return (
        // specifies the tag for render the DropDownTree component
        <DropDownTreeComponent id="dropdowntree" fields={this.fields}/>);
    }
}
ReactDOM.render(<App />, document.getElementById('sample'));

Run the application

After completing the configuration required to render a basic Dropdown Tree, run the following command to display the output in your default browser.

Copied to clipboard
npm start
Source
Preview
index.tsx
index.jsx
Copied to clipboard
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

export default class App extends React.Component<{}, {}> {
  // definining the dataSource
  private data: { [key: string]: Object }[] = [
     {
        nodeId: '01', nodeText: 'Music',
        nodeChild: [
            { nodeId: '01-01', nodeText: 'Gouttes.mp3' }
        ]
     },
     {
        nodeId: '02', nodeText: 'Videos', expanded: true,
        nodeChild: [
            { nodeId: '02-01', nodeText: 'Naturals.mp4' },
            { nodeId: '02-02', nodeText: 'Wild.mpeg' },
        ]
     },
     {
        nodeId: '03', nodeText: 'Documents',
        nodeChild: [
            { nodeId: '03-01', nodeText: 'Environment Pollution.docx' },
            { nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx' },
            { nodeId: '03-03', nodeText: 'Global Warming.ppt' },
            { nodeId: '03-04', nodeText: 'Social Network.pdf' },
            { nodeId: '03-05', nodeText: 'Youth Empowerment.pdf' },
        ]
     },
    ];
    private fields: Object = { dataSource: this.data, value: 'nodeId', text: 'nodeText', child: 'nodeChild' };
  public render() {
    return (
        // specifies the tag for render the DropDownTree component
      <DropDownTreeComponent id="dropdowntree" fields={this.fields} />
    );
  }
}
ReactDOM.render(<App />, document.getElementById('sample'));
Copied to clipboard
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
export default class App extends React.Component {
    constructor() {
        super(...arguments);
        // definining the dataSource
        this.data = [
            {
                nodeId: '01', nodeText: 'Music',
                nodeChild: [
                    { nodeId: '01-01', nodeText: 'Gouttes.mp3' }
                ]
            },
            {
                nodeId: '02', nodeText: 'Videos', expanded: true,
                nodeChild: [
                    { nodeId: '02-01', nodeText: 'Naturals.mp4' },
                    { nodeId: '02-02', nodeText: 'Wild.mpeg' },
                ]
            },
            {
                nodeId: '03', nodeText: 'Documents',
                nodeChild: [
                    { nodeId: '03-01', nodeText: 'Environment Pollution.docx' },
                    { nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx' },
                    { nodeId: '03-03', nodeText: 'Global Warming.ppt' },
                    { nodeId: '03-04', nodeText: 'Social Network.pdf' },
                    { nodeId: '03-05', nodeText: 'Youth Empowerment.pdf' },
                ]
            },
        ];
        this.fields = { dataSource: this.data, value: 'nodeId', text: 'nodeText', child: 'nodeChild' };
    }
    render() {
        return (
        // specifies the tag for render the DropDownTree component
        <DropDownTreeComponent id="dropdowntree" fields={this.fields}/>);
    }
}
ReactDOM.render(<App />, document.getElementById('sample'));