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Getting Started with React MultiColumn Combobox component

10 Feb 202624 minutes to read

This section explains the steps required to create a simple React MultiColumn Combobox component and demonstrate its basic usage in a React environment.

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Setup for local development

Easily set up a React application using create-vite-app, which provides a faster development environment, smaller bundle sizes, and optimized builds compared to traditional tools like create-react-app. For detailed steps, refer to the Vite installation instructions. Vite sets up your environment using JavaScript and optimizes your application for production.

Note: To create a React application using create-react-app, refer to this documentation for more details.

To create a new React application, run the following command.

npm create vite@latest my-app

This command will prompt you for a few settings for the new project, such as selecting a framework and a variant.

Initial_setup

To set up a React application in TypeScript environment, run the following command.

npm create vite@latest my-app -- --template react-ts
cd my-app
npm run dev

To set up a React application in JavaScript environment, run the following command.

npm create vite@latest my-app -- --template react
cd my-app
npm run dev

Adding Syncfusion® MultiColumn Combobox packages

All the available Essential® JS 2 packages are published in the npmjs.com public registry.
To install the MultiColumn Combobox component, use the following command

npm install @syncfusion/ej2-react-multicolumn-combobox --save

The –save will instruct NPM to include the MultiColumn Combobox package inside of the dependencies section of the package.json.

Adding CSS reference

The following CSS files are available in the ../node_modules/@syncfusion package folder. Add these as references in src/App.css.

@import "../node_modules/@syncfusion/ej2-base/styles/tailwind3.css";
@import "../node_modules/@syncfusion/ej2-inputs/styles/tailwind3.css";
@import "../node_modules/@syncfusion/ej2-grids/styles/tailwind3.css";
@import "../node_modules/@syncfusion/ej2-popups/styles/tailwind3.css";
@import "../node_modules/@syncfusion/ej2-react-multicolumn-combobox/styles/tailwind3.css";

To refer App.css in the application then import it in the src/App.tsx file.

Adding MultiColumn Combobox component

The React MultiColumn Combobox component can be added to the application by following these steps. To get started, add the MultiColumn Combobox component to the src/App.tsx file using the following code.

The following multicolumn combobox code should be placed in the src/App.tsx file.
[Class-component]

import { MultiColumnComboBoxComponent } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import './App.css';

export default class App extends React.Component<{}, {}> {
  public render() {
    return (
        // specifies the tag for render the MultiColumn ComboBox component
        <MultiColumnComboBoxComponent id="multicolumn"></MultiColumnComboBoxComponent>
    );
  }
}

[Functional-component]

import { MultiColumnComboBoxComponent } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import './App.css';

function App() {
    return (
        // specifies the tag for render the MultiColumn ComboBox component
        <MultiColumnComboBoxComponent id="multicolumn"></MultiColumnComboBoxComponent>
    );
}
export default App;

Binding data source with fields and columns

After initializing, populate the MultiColumn ComboBox with data by using the dataSource property, to map the data for each specified columns use the <ColumnDirective> selector and the fields property to map the data fields from the dataSource.

[Class-component]

import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import './App.css';

export default class App extends React.Component<{}, {}> {
  // define the array of object data
  private employeeData: Object[] = [ 
    { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
    { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
    { "EmpID": 1003, "Name": "John", "Designation": "Tester", "Country": "Germany" },
    { "EmpID": 1004, "Name": "Robert King", "Designation": "Product Manager", "Country": "India" },
    { "EmpID": 1005, "Name": "Steven Buchanan", "Designation": "Developer", "Country": "Italy" },
    { "EmpID": 1006, "Name": "Jane Smith", "Designation": "Developer", "Country": "Europe" },
    { "EmpID": 1007, "Name": "James Brown", "Designation": "Developer", "Country": "Australia" },
    { "EmpID": 1008, "Name": "Laura Callahan", "Designation": "Developer", "Country": "Africa" },
    { "EmpID": 1009, "Name": "Mario Pontes", "Designation": "Developer", "Country": "Russia" }
  ];
  // maps the appropriate column to fields property
  private fields: Object = { text: 'Name', value: 'EmpID' };
  public render() {
    return (
        // specifies the tag for render the MultiColumn ComboBox component
        <MultiColumnComboBoxComponent id="multicolumn" dataSource={this.employeeData} fields={this.fields}>
            <ColumnsDirective>
                <ColumnDirective field='EmpID' header='Employee ID' width={120}></ColumnDirective>
                <ColumnDirective field='Name' header='Name' width={120}></ColumnDirective>
                <ColumnDirective field='Designation' header='Designation' width={120}></ColumnDirective>
                <ColumnDirective field='Country' header='Country' width={100}></ColumnDirective>
            </ColumnsDirective>
        </MultiColumnComboBoxComponent>
    );
  }
}

[Functional-component]

import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import './App.css';

function App() {
  // define the array of object data
  const employeeData: Object[] = [ 
    { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
    { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
    { "EmpID": 1003, "Name": "John", "Designation": "Tester", "Country": "Germany" },
    { "EmpID": 1004, "Name": "Robert King", "Designation": "Product Manager", "Country": "India" },
    { "EmpID": 1005, "Name": "Steven Buchanan", "Designation": "Developer", "Country": "Italy" },
    { "EmpID": 1006, "Name": "Jane Smith", "Designation": "Developer", "Country": "Europe" },
    { "EmpID": 1007, "Name": "James Brown", "Designation": "Developer", "Country": "Australia" },
    { "EmpID": 1008, "Name": "Laura Callahan", "Designation": "Developer", "Country": "Africa" },
    { "EmpID": 1009, "Name": "Mario Pontes", "Designation": "Developer", "Country": "Russia" }
  ];
  // maps the appropriate column to fields property
  const fields: Object = { text: 'Name', value: 'EmpID' };
  return (
    // specifies the tag for render the MultiColumn ComboBox component
    <MultiColumnComboBoxComponent id="multicolumn" dataSource={employeeData} fields={fields}>
        <ColumnsDirective>
            <ColumnDirective field='EmpID' header='Employee ID' width={120}></ColumnDirective>
            <ColumnDirective field='Name' header='Name' width={120}></ColumnDirective>
            <ColumnDirective field='Designation' header='Designation' width={120}></ColumnDirective>
            <ColumnDirective field='Country' header='Country' width={100}></ColumnDirective>
        </ColumnsDirective>
    </MultiColumnComboBoxComponent>
  );
}
export default App;

Run the application

Run the npm run dev command in the terminal to start the development server. This command compiles your code and serves the application locally, opening it in the browser.

npm run dev

The output appears as follows.

[Class-componnet]

import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
export default class App extends React.Component {
    // defined the array of data
    empData = [
        { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
        { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
        { "EmpID": 1003, "Name": "Michael", "Designation": "HR", "Country": "Russia" },
        { "EmpID": 1004, "Name": "Steven Buchanan", "Designation": "Product Manager", "Country": "Ukraine" },
        { "EmpID": 1005, "Name": "Margaret Peacock", "Designation": "Developer", "Country": "Egypt" },
        { "EmpID": 1006, "Name": "Janet Leverling", "Designation": "Team Lead", "Country": "Africa" },
        { "EmpID": 1007, "Name": "Alice", "Designation": "Product Manager", "Country": "Australia" },
        { "EmpID": 1008, "Name": "Bob", "Designation": "Developer", "Country": "India" },
        { "EmpID": 1009, "Name": "John", "Designation": "Product Manager", "Country": "Ireland" },
        { "EmpID": 1010, "Name": "Mario Pontes", "Designation": "Team Lead", "Country": "South Africa" },
        { "EmpID": 1011, "Name": "Yang Wang", "Designation": "Developer", "Country": "Russia" },
        { "EmpID": 1012, "Name": "David", "Designation": "Product Manager", "Country": "Egypt" },
        { "EmpID": 1013, "Name": "Antonio Bianchi", "Designation": "Team Lead", "Country": "USA" },
        { "EmpID": 1014, "Name": "Laura", "Designation": "Developer", "Country": "England" },
        { "EmpID": 1015, "Name": "Carlos Hernandez", "Designation": "Developer", "Country": "Canada" },
        { "EmpID": 1016, "Name": "Lily", "Designation": "Product Manager", "Country": "France" },
        { "EmpID": 1017, "Name": "Tom Williams", "Designation": "Developer", "Country": "Ukraine" },
        { "EmpID": 1018, "Name": "Grace", "Designation": "Developer", "Country": "Australia" },
        { "EmpID": 1019, "Name": "Olivia", "Designation": "Team Lead", "Country": "Ireland" },
        { "EmpID": 1020, "Name": "James", "Designation": "Developer", "Country": "China" },
    ];

    // maps the appropriate column to fields property
    fields = { text: 'Name', value: 'EmpID' };
    // set placeholder to multicolumn ComboBox input element
    waterMark = 'Select a employee';

    render() {
        return (
            <MultiColumnComboBoxComponent id="multicolumn" dataSource={this.empData} fields={this.fields} placeholder={this.waterMark}>
                <ColumnsDirective>
                    <ColumnDirective field='EmpID' header='Employee ID' width={120}></ColumnDirective>
                    <ColumnDirective field='Name' header='Name' width={120}></ColumnDirective>
                    <ColumnDirective field='Designation' header='Designation' width={120}></ColumnDirective>
                    <ColumnDirective field='Country' header='Country' width={100}></ColumnDirective>
                </ColumnsDirective>
            </MultiColumnComboBoxComponent>
        );
    }
}
ReactDOM.render(<App />, document.getElementById('multicolumn'));
import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

export default class App extends React.Component<{}, {}> {
    // defined the array of data
    private empData: { [key: string]: Object }[] = [
        { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
        { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
        { "EmpID": 1003, "Name": "Michael", "Designation": "HR", "Country": "Russia" },
        { "EmpID": 1004, "Name": "Steven Buchanan", "Designation": "Product Manager", "Country": "Ukraine" },
        { "EmpID": 1005, "Name": "Margaret Peacock", "Designation": "Developer", "Country": "Egypt" },
        { "EmpID": 1006, "Name": "Janet Leverling", "Designation": "Team Lead", "Country": "Africa" },
        { "EmpID": 1007, "Name": "Alice", "Designation": "Product Manager", "Country": "Australia" },
        { "EmpID": 1008, "Name": "Bob", "Designation": "Developer", "Country": "India" },
        { "EmpID": 1009, "Name": "John", "Designation": "Product Manager", "Country": "Ireland" },
        { "EmpID": 1010, "Name": "Mario Pontes", "Designation": "Team Lead", "Country": "South Africa" },
        { "EmpID": 1011, "Name": "Yang Wang", "Designation": "Developer", "Country": "Russia" },
        { "EmpID": 1012, "Name": "David", "Designation": "Product Manager", "Country": "Egypt" },
        { "EmpID": 1013, "Name": "Antonio Bianchi", "Designation": "Team Lead", "Country": "USA" },
        { "EmpID": 1014, "Name": "Laura", "Designation": "Developer", "Country": "England" },
        { "EmpID": 1015, "Name": "Carlos Hernandez", "Designation": "Developer", "Country": "Canada" },
        { "EmpID": 1016, "Name": "Lily", "Designation": "Product Manager", "Country": "France" },
        { "EmpID": 1017, "Name": "Tom Williams", "Designation": "Developer", "Country": "Ukraine" },
        { "EmpID": 1018, "Name": "Grace", "Designation": "Developer", "Country": "Australia" },
        { "EmpID": 1019, "Name": "Olivia", "Designation": "Team Lead", "Country": "Ireland" },
        { "EmpID": 1020, "Name": "James", "Designation": "Developer", "Country": "China" },
    ];

    // maps the appropriate column to fields property
    private fields: object = { text: 'Name', value: 'EmpID' };
    // set placeholder to multicolumn ComboBox input element 
    private waterMark: string = 'Select a employee';

    public render() {
        return (
            <MultiColumnComboBoxComponent id="multicolumn" dataSource={this.empData} fields={this.fields} placeholder={this.waterMark}>
                <ColumnsDirective>
                    <ColumnDirective field='EmpID' header='Employee ID' width={120}></ColumnDirective>
                    <ColumnDirective field='Name' header='Name' width={120}></ColumnDirective>
                    <ColumnDirective field='Designation' header='Designation' width={120}></ColumnDirective>
                    <ColumnDirective field='Country' header='Country' width={100}></ColumnDirective>
                </ColumnsDirective>
            </MultiColumnComboBoxComponent>
        );
    }
}
ReactDOM.render(<App />, document.getElementById('multicolumn'));

[Functional-componnet]

import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

function App() {
  // defined the array of object data
  const empData = [
    { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
    { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
    { "EmpID": 1003, "Name": "Michael", "Designation": "HR", "Country": "Russia" },
    { "EmpID": 1004, "Name": "Steven Buchanan", "Designation": "Product Manager", "Country": "Ukraine" },
    { "EmpID": 1005, "Name": "Margaret Peacock", "Designation": "Developer", "Country": "Egypt" },
    { "EmpID": 1006, "Name": "Janet Leverling", "Designation": "Team Lead", "Country": "Africa" },
    { "EmpID": 1007, "Name": "Alice", "Designation": "Product Manager", "Country": "Australia" },
    { "EmpID": 1008, "Name": "Bob", "Designation": "Developer", "Country": "India" },
    { "EmpID": 1009, "Name": "John", "Designation": "Product Manager", "Country": "Ireland"},
    { "EmpID": 1010, "Name": "Mario Pontes", "Designation": "Team Lead", "Country": "South Africa" },
    { "EmpID": 1011, "Name": "Yang Wang", "Designation": "Developer", "Country": "Russia" },
    { "EmpID": 1012, "Name": "David", "Designation": "Product Manager", "Country": "Egypt" },
    { "EmpID": 1013, "Name": "Antonio Bianchi", "Designation": "Team Lead", "Country": "USA" },
    { "EmpID": 1014, "Name": "Laura", "Designation": "Developer", "Country": "England" },
    { "EmpID": 1015, "Name": "Carlos Hernandez", "Designation": "Developer", "Country": "Canada" },
    { "EmpID": 1016, "Name": "Lily", "Designation": "Product Manager", "Country": "France" },
    { "EmpID": 1017, "Name": "Tom Williams", "Designation": "Developer", "Country": "Ukraine" },
    { "EmpID": 1018, "Name": "Grace", "Designation": "Developer", "Country": "Australia" },
    { "EmpID": 1019, "Name": "Olivia", "Designation": "Team Lead", "Country": "Ireland" },
    { "EmpID": 1020, "Name": "James", "Designation": "Developer", "Country": "China" },
];
  // maps the appropriate column to fields property
  const fields = { text: 'Name', value: 'EmpID' };
  // set placeholder to multicolumn ComboBox input element
  const waterMark = 'Select a employee';

  return (
    // specifies the tag for render the MultiColumn ComboBox component
    <MultiColumnComboBoxComponent id="multicolumn" dataSource={empData} fields={fields} placeholder={waterMark}>
        <ColumnsDirective>
            <ColumnDirective field='EmpID' header='Employee ID' width={120}></ColumnDirective>
            <ColumnDirective field='Name' header='Name' width={120}></ColumnDirective>
            <ColumnDirective field='Designation' header='Designation' width={120}></ColumnDirective>
            <ColumnDirective field='Country' header='Country' width={100}></ColumnDirective>
        </ColumnsDirective>
    </MultiColumnComboBoxComponent>
  );
}
ReactDOM.render(<App />, document.getElementById('multicolumn'));
import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

function App() {
  // defined the array of object data
  const empData: { [key: string]: Object }[] = [
    { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
    { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
    { "EmpID": 1003, "Name": "Michael", "Designation": "HR", "Country": "Russia" },
    { "EmpID": 1004, "Name": "Steven Buchanan", "Designation": "Product Manager", "Country": "Ukraine" },
    { "EmpID": 1005, "Name": "Margaret Peacock", "Designation": "Developer", "Country": "Egypt" },
    { "EmpID": 1006, "Name": "Janet Leverling", "Designation": "Team Lead", "Country": "Africa" },
    { "EmpID": 1007, "Name": "Alice", "Designation": "Product Manager", "Country": "Australia" },
    { "EmpID": 1008, "Name": "Bob", "Designation": "Developer", "Country": "India" },
    { "EmpID": 1009, "Name": "John", "Designation": "Product Manager", "Country": "Ireland"},
    { "EmpID": 1010, "Name": "Mario Pontes", "Designation": "Team Lead", "Country": "South Africa" },
    { "EmpID": 1011, "Name": "Yang Wang", "Designation": "Developer", "Country": "Russia" },
    { "EmpID": 1012, "Name": "David", "Designation": "Product Manager", "Country": "Egypt" },
    { "EmpID": 1013, "Name": "Antonio Bianchi", "Designation": "Team Lead", "Country": "USA" },
    { "EmpID": 1014, "Name": "Laura", "Designation": "Developer", "Country": "England" },
    { "EmpID": 1015, "Name": "Carlos Hernandez", "Designation": "Developer", "Country": "Canada" },
    { "EmpID": 1016, "Name": "Lily", "Designation": "Product Manager", "Country": "France" },
    { "EmpID": 1017, "Name": "Tom Williams", "Designation": "Developer", "Country": "Ukraine" },
    { "EmpID": 1018, "Name": "Grace", "Designation": "Developer", "Country": "Australia" },
    { "EmpID": 1019, "Name": "Olivia", "Designation": "Team Lead", "Country": "Ireland" },
    { "EmpID": 1020, "Name": "James", "Designation": "Developer", "Country": "China" },
];
  // maps the appropriate column to fields property
  const fields: Object = { text: 'Name', value: 'EmpID' };
  // set placeholder to multicolumn ComboBox input element
  const waterMark: string = 'Select a employee';

  return (
    // specifies the tag for render the MultiColumn ComboBox component
    <MultiColumnComboBoxComponent id="multicolumn" dataSource={empData} fields={fields} placeholder={waterMark}>
        <ColumnsDirective>
            <ColumnDirective field='EmpID' header='Employee ID' width={120}></ColumnDirective>
            <ColumnDirective field='Name' header='Name' width={120}></ColumnDirective>
            <ColumnDirective field='Designation' header='Designation' width={120}></ColumnDirective>
            <ColumnDirective field='Country' header='Country' width={100}></ColumnDirective>
        </ColumnsDirective>
    </MultiColumnComboBoxComponent>
  );
}
ReactDOM.render(<App />, document.getElementById('multicolumn'));

Configure the popup list

By default, the width of the popup list automatically adjusts according to the MultiColumn ComboBox input element’s width, and the height of the popup list has ‘300px’.

The height and width of the popup list can also be customized using the popupHeight and popupWidth properties respectively.

In the following sample, popup list’s width and height are configured.

[Class-component]

import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
export default class App extends React.Component {
    
    // defined the array of data
    empData = [
        { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
        { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
        { "EmpID": 1003, "Name": "Michael", "Designation": "HR", "Country": "Russia" },
        { "EmpID": 1004, "Name": "Steven Buchanan", "Designation": "Product Manager", "Country": "Ukraine" },
        { "EmpID": 1005, "Name": "Margaret Peacock", "Designation": "Developer", "Country": "Egypt" },
        { "EmpID": 1006, "Name": "Janet Leverling", "Designation": "Team Lead", "Country": "Africa" },
        { "EmpID": 1007, "Name": "Alice", "Designation": "Product Manager", "Country": "Australia" },
        { "EmpID": 1008, "Name": "Bob", "Designation": "Developer", "Country": "India" },
        { "EmpID": 1009, "Name": "John", "Designation": "Product Manager", "Country": "Ireland"},
        { "EmpID": 1010, "Name": "Mario Pontes", "Designation": "Team Lead", "Country": "South Africa" },
        { "EmpID": 1011, "Name": "Yang Wang", "Designation": "Developer", "Country": "Russia" },
        { "EmpID": 1012, "Name": "David", "Designation": "Product Manager", "Country": "Egypt" },
        { "EmpID": 1013, "Name": "Antonio Bianchi", "Designation": "Team Lead", "Country": "USA" },
        { "EmpID": 1014, "Name": "Laura", "Designation": "Developer", "Country": "England" },
        { "EmpID": 1015, "Name": "Carlos Hernandez", "Designation": "Developer", "Country": "Canada" },
        { "EmpID": 1016, "Name": "Lily", "Designation": "Product Manager", "Country": "France" },
        { "EmpID": 1017, "Name": "Tom Williams", "Designation": "Developer", "Country": "Ukraine" },
        { "EmpID": 1018, "Name": "Grace", "Designation": "Developer", "Country": "Australia" },
        { "EmpID": 1019, "Name": "Olivia", "Designation": "Team Lead", "Country": "Ireland" },
        { "EmpID": 1020, "Name": "James", "Designation": "Developer", "Country": "China" },
    ];

    // maps the appropriate column to fields property
    fields = { text: 'Name', value: 'EmpID' };
    // set placeholder to multicolumn ComboBox input element
    waterMark = 'Select a employee';

    render() {
        return (
            <MultiColumnComboBoxComponent id="multicolumn" dataSource={this.empData} fields={this.fields} popupWidth={500} popupHeight={250} placeholder={this.waterMark}>
                <ColumnsDirective>
                    <ColumnDirective field='EmpID' header='Employee ID' width={90}></ColumnDirective>
                    <ColumnDirective field='Name' header='Name' width={90}></ColumnDirective>
                    <ColumnDirective field='Designation' header='Designation' width={90}></ColumnDirective>
                    <ColumnDirective field='Country' header='Country' width={70}></ColumnDirective>
                </ColumnsDirective>
            </MultiColumnComboBoxComponent>
        );
    }
}
ReactDOM.render(<App />, document.getElementById('multicolumn'));
import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

export default class App extends React.Component<{}, {}> {
    // defined the array of data
    private empData: { [key: string]: Object }[] = [
        { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
        { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
        { "EmpID": 1003, "Name": "Michael", "Designation": "HR", "Country": "Russia" },
        { "EmpID": 1004, "Name": "Steven Buchanan", "Designation": "Product Manager", "Country": "Ukraine" },
        { "EmpID": 1005, "Name": "Margaret Peacock", "Designation": "Developer", "Country": "Egypt" },
        { "EmpID": 1006, "Name": "Janet Leverling", "Designation": "Team Lead", "Country": "Africa" },
        { "EmpID": 1007, "Name": "Alice", "Designation": "Product Manager", "Country": "Australia" },
        { "EmpID": 1008, "Name": "Bob", "Designation": "Developer", "Country": "India" },
        { "EmpID": 1009, "Name": "John", "Designation": "Product Manager", "Country": "Ireland"},
        { "EmpID": 1010, "Name": "Mario Pontes", "Designation": "Team Lead", "Country": "South Africa" },
        { "EmpID": 1011, "Name": "Yang Wang", "Designation": "Developer", "Country": "Russia" },
        { "EmpID": 1012, "Name": "David", "Designation": "Product Manager", "Country": "Egypt" },
        { "EmpID": 1013, "Name": "Antonio Bianchi", "Designation": "Team Lead", "Country": "USA" },
        { "EmpID": 1014, "Name": "Laura", "Designation": "Developer", "Country": "England" },
        { "EmpID": 1015, "Name": "Carlos Hernandez", "Designation": "Developer", "Country": "Canada" },
        { "EmpID": 1016, "Name": "Lily", "Designation": "Product Manager", "Country": "France" },
        { "EmpID": 1017, "Name": "Tom Williams", "Designation": "Developer", "Country": "Ukraine" },
        { "EmpID": 1018, "Name": "Grace", "Designation": "Developer", "Country": "Australia" },
        { "EmpID": 1019, "Name": "Olivia", "Designation": "Team Lead", "Country": "Ireland" },
        { "EmpID": 1020, "Name": "James", "Designation": "Developer", "Country": "China" },
    ];

    // maps the appropriate column to fields property
    private fields: object = { text: 'Name', value: 'EmpID' };
    // set placeholder to multicolumn ComboBox input element 
    private waterMark: string = 'Select a employee';

    public render() {
        return (
            <MultiColumnComboBoxComponent id="multicolumn" dataSource={this.empData} fields={this.fields} popupWidth={500} popupHeight={250} placeholder={this.waterMark}>
                <ColumnsDirective>
                    <ColumnDirective field='EmpID' header='Employee ID' width={90}></ColumnDirective>
                    <ColumnDirective field='Name' header='Name' width={90}></ColumnDirective>
                    <ColumnDirective field='Designation' header='Designation' width={90}></ColumnDirective>
                    <ColumnDirective field='Country' header='Country' width={70}></ColumnDirective>
                </ColumnsDirective>
            </MultiColumnComboBoxComponent>
        );
    }
}
ReactDOM.render(<App />, document.getElementById('multicolumn'));

[Functional-component]

import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

function App() {
  // defined the array of object data
  const empData = [
    { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
    { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
    { "EmpID": 1003, "Name": "Michael", "Designation": "HR", "Country": "Russia" },
    { "EmpID": 1004, "Name": "Steven Buchanan", "Designation": "Product Manager", "Country": "Ukraine" },
    { "EmpID": 1005, "Name": "Margaret Peacock", "Designation": "Developer", "Country": "Egypt" },
    { "EmpID": 1006, "Name": "Janet Leverling", "Designation": "Team Lead", "Country": "Africa" },
    { "EmpID": 1007, "Name": "Alice", "Designation": "Product Manager", "Country": "Australia" },
    { "EmpID": 1008, "Name": "Bob", "Designation": "Developer", "Country": "India" },
    { "EmpID": 1009, "Name": "John", "Designation": "Product Manager", "Country": "Ireland"},
    { "EmpID": 1010, "Name": "Mario Pontes", "Designation": "Team Lead", "Country": "South Africa" },
    { "EmpID": 1011, "Name": "Yang Wang", "Designation": "Developer", "Country": "Russia" },
    { "EmpID": 1012, "Name": "David", "Designation": "Product Manager", "Country": "Egypt" },
    { "EmpID": 1013, "Name": "Antonio Bianchi", "Designation": "Team Lead", "Country": "USA" },
    { "EmpID": 1014, "Name": "Laura", "Designation": "Developer", "Country": "England" },
    { "EmpID": 1015, "Name": "Carlos Hernandez", "Designation": "Developer", "Country": "Canada" },
    { "EmpID": 1016, "Name": "Lily", "Designation": "Product Manager", "Country": "France" },
    { "EmpID": 1017, "Name": "Tom Williams", "Designation": "Developer", "Country": "Ukraine" },
    { "EmpID": 1018, "Name": "Grace", "Designation": "Developer", "Country": "Australia" },
    { "EmpID": 1019, "Name": "Olivia", "Designation": "Team Lead", "Country": "Ireland" },
    { "EmpID": 1020, "Name": "James", "Designation": "Developer", "Country": "China" },
];
  // maps the appropriate column to fields property
  const fields = { text: 'Name', value: 'EmpID' };
  // set placeholder to multicolumn ComboBox input element
  const waterMark = 'Select a employee';

  return (
    // specifies the tag for render the MultiColumn ComboBox component
    <MultiColumnComboBoxComponent id="multicolumn" dataSource={empData} fields={fields} popupWidth={500} popupHeight={250} placeholder={waterMark}>
        <ColumnsDirective>
            <ColumnDirective field='EmpID' header='Employee ID' width={90}></ColumnDirective>
            <ColumnDirective field='Name' header='Name' width={90}></ColumnDirective>
            <ColumnDirective field='Designation' header='Designation' width={90}></ColumnDirective>
            <ColumnDirective field='Country' header='Country' width={70}></ColumnDirective>
        </ColumnsDirective>
    </MultiColumnComboBoxComponent>
  );
}
ReactDOM.render(<App />, document.getElementById('multicolumn'));
import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2-react-multicolumn-combobox';
import * as React from 'react';
import * as ReactDOM from 'react-dom';

function App() {
  // defined the array of object data
  const empData: { [key: string]: Object }[] = [
    { "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
    { "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
    { "EmpID": 1003, "Name": "Michael", "Designation": "HR", "Country": "Russia" },
    { "EmpID": 1004, "Name": "Steven Buchanan", "Designation": "Product Manager", "Country": "Ukraine" },
    { "EmpID": 1005, "Name": "Margaret Peacock", "Designation": "Developer", "Country": "Egypt" },
    { "EmpID": 1006, "Name": "Janet Leverling", "Designation": "Team Lead", "Country": "Africa" },
    { "EmpID": 1007, "Name": "Alice", "Designation": "Product Manager", "Country": "Australia" },
    { "EmpID": 1008, "Name": "Bob", "Designation": "Developer", "Country": "India" },
    { "EmpID": 1009, "Name": "John", "Designation": "Product Manager", "Country": "Ireland"},
    { "EmpID": 1010, "Name": "Mario Pontes", "Designation": "Team Lead", "Country": "South Africa" },
    { "EmpID": 1011, "Name": "Yang Wang", "Designation": "Developer", "Country": "Russia" },
    { "EmpID": 1012, "Name": "David", "Designation": "Product Manager", "Country": "Egypt" },
    { "EmpID": 1013, "Name": "Antonio Bianchi", "Designation": "Team Lead", "Country": "USA" },
    { "EmpID": 1014, "Name": "Laura", "Designation": "Developer", "Country": "England" },
    { "EmpID": 1015, "Name": "Carlos Hernandez", "Designation": "Developer", "Country": "Canada" },
    { "EmpID": 1016, "Name": "Lily", "Designation": "Product Manager", "Country": "France" },
    { "EmpID": 1017, "Name": "Tom Williams", "Designation": "Developer", "Country": "Ukraine" },
    { "EmpID": 1018, "Name": "Grace", "Designation": "Developer", "Country": "Australia" },
    { "EmpID": 1019, "Name": "Olivia", "Designation": "Team Lead", "Country": "Ireland" },
    { "EmpID": 1020, "Name": "James", "Designation": "Developer", "Country": "China" },
];
  // maps the appropriate column to fields property
  const fields: Object = { text: 'Name', value: 'EmpID' };
  // set placeholder to multicolumn ComboBox input element
  const waterMark: string = 'Select a employee';

  return (
    // specifies the tag for render the MultiColumn ComboBox component
    <MultiColumnComboBoxComponent id="multicolumn" dataSource={empData} fields={fields} popupWidth={500} popupHeight={250} placeholder={waterMark}>
        <ColumnsDirective>
            <ColumnDirective field='EmpID' header='Employee ID' width={90}></ColumnDirective>
            <ColumnDirective field='Name' header='Name' width={90}></ColumnDirective>
            <ColumnDirective field='Designation' header='Designation' width={90}></ColumnDirective>
            <ColumnDirective field='Country' header='Country' width={70}></ColumnDirective>
        </ColumnsDirective>
    </MultiColumnComboBoxComponent>
  );
}
ReactDOM.render(<App />, document.getElementById('multicolumn'));

Refer to the React MultiColumn Combobox feature tour page for its groundbreaking feature representations. You can also explore our React MultiColumn Combobox component example that shows how to render the MultiColumn Combobox in React.