Templates in React Drop down tree component

27 Dec 202424 minutes to read

The Dropdown Tree provides support for customizing each list item, header, and footer elements.

Item template

The content of each list item within the Dropdown Tree can be customized using the itemTemplate property.

In the following sample, the Dropdown Tree list items are customized with employee information such as name and job using the itemTemplate property.

The template expression should be provided inside the {…} interpolation syntax.

import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
    let data = [
        { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
        { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
        { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
        { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
        { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
        { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
        { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
        { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
        { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
        { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
    ];
    let fields = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
    function itemTemplate(data) {
        return (<div><span className="ename"> {data.name} - </span><span className="ejob"> {data.job} </span></div>);
    }
    return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" itemTemplate={itemTemplate} popupHeight="270px" cssClass="custom" width="100%" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
  let data: { [key: string]: Object }[] = [
    { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
    { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
    { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
    { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
    { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
    { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
    { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
    { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
    { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
    { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
  ];
  let fields: Object = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
  function itemTemplate(data: any): JSX.Element {
    return (<div><span className="ename"> {data.name} - </span><span className="ejob"> {data.job} </span></div>);
  }
  return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" itemTemplate={itemTemplate} popupHeight="270px" cssClass="custom" width="100%" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
.custom .ejob {
    opacity: .60;
}
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Dropdown Tree</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="./styles.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='sample' style="margin: 20px auto 0; width:250px;">
        <div id='loader'>Loading....</div>
    </div>
</body>

</html>

Value template

The currently selected value displayed by default in the Dropdown Tree input element can be customized using the valueTemplate property.

In the following sample, the selected value is displayed as a combined text of both Name and Job in the Dropdown Tree input, which is separated by a hyphen.

The template expression should be provided inside the {…} interpolation syntax.

import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
    let data = [
        { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
        { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
        { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
        { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
        { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
        { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
        { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
        { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
        { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
        { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
    ];
    let fields = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
    function valueTemplate(data) {
        return (<div><span className="ename"> {data.name} - </span><span className="ejob"> {data.job} </span></div>);
    }
    return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" valueTemplate={valueTemplate} popupHeight="270px" cssClass="custom" width="100%" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
  let data: { [key: string]: Object }[] = [
    { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
    { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
    { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
    { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
    { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
    { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
    { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
    { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
    { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
    { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
  ];
  let fields: Object = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
  function valueTemplate(data: any): JSX.Element {
    return (<div><span className="ename"> {data.name} - </span><span className="ejob"> {data.job} </span></div>);
  }
  return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" valueTemplate={valueTemplate} popupHeight="270px" cssClass="custom" width="100%" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
.custom .ejob {
    opacity: .60;
}
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Dropdown Tree</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="./styles.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='sample' style="margin: 20px auto 0; width:250px;">
        <div id='loader'>Loading....</div>
    </div>
</body>

</html>

Header template

The header element is shown statically at the top of the popup list items within the Dropdown Tree. A custom element can be used as a header element using the headerTemplate property.

In the following sample, the header is customized with the custom element.

import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
    let data = [
        { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
        { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
        { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
        { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
        { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
        { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
        { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
        { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
        { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
        { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
    ];
    let fields = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
    function headerTemplate() {
        return (<div className="head"> Employee List </div>);
    }
    return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" headerTemplate={headerTemplate} popupHeight="270px" cssClass="custom" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
  let data: { [key: string]: Object }[] = [
    { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
    { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
    { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
    { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
    { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
    { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
    { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
    { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
    { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
    { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
  ];
  let fields: Object = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
  function headerTemplate(): JSX.Element {
    return (<div className="head"> Employee List </div>);
  }
  return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" headerTemplate={headerTemplate} popupHeight="270px" cssClass="custom" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
.custom .head {
    height: 40px;
    line-height: 40px;
    font-size: 14px;
    margin: 0 auto;
    width: 200px;
    padding: 0 20px;
    font-weight: bold;
    border-bottom: 1px solid #e0e0e0;
}
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Dropdown Tree</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="./styles.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='sample' style="margin: 20px auto 0; width:250px;">
        <div id='loader'>Loading....</div>
    </div>
</body>

</html>

The Dropdown Tree has options to show a footer element at the bottom of the list items in the popup list. Here, you can place any custom element as a footer element using the footerTemplate property.

In the following sample, the footer element displays the total number of employees present in the Dropdown Tree.

import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
    let data = [
        { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
        { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
        { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
        { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
        { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
        { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
        { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
        { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
        { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
        { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
    ];
    let fields = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
    function footerTemplate() {
        return (<div className='foot'> Total number of employees: 10 </div>);
    }
    return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" footerTemplate={footerTemplate} popupHeight="270px" cssClass="custom" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
  let data: { [key: string]: Object }[] = [
    { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
    { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
    { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
    { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
    { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
    { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
    { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
    { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
    { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
    { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
  ];
  let fields: object = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
  function footerTemplate(): JSX.Element {
    return (<div className='foot'> Total number of employees: 10 </div>);
  }
  return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" footerTemplate={footerTemplate} popupHeight="270px" cssClass="custom" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
.custom .foot {
    height: 40px;
    line-height: 40px;
    font-size: 14px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    font-weight: bold;
}

.custom .e-ddt-footer {
    border-top: 1px solid #e0e0e0;
}
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Dropdown Tree</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="./styles.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='sample' style="margin: 20px auto 0; width:250px;">
        <div id='loader'>Loading....</div>
    </div>
</body>

</html>

No records template

The Dropdown Tree supports displaying custom designs in the popup list content using the noRecordsTemplate property when no matches found on search.

In the following sample, popup list content displays the notification of no data available.

import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
    let data = [];
    let fields = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
    function noRecordsTemplate() {
        return (<div className='norecord'> NO DATA AVAILABLE </div>);
    }
    return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" noRecordsTemplate={noRecordsTemplate} popupHeight="270px" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
  let data: { [key: string]: Object }[] = [];
  let fields: object = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
  function noRecordsTemplate(): JSX.Element {
    return (<div className='norecord'> NO DATA AVAILABLE </div>)
  }
  return (<DropDownTreeComponent fields={fields} placeholder="Select an employee" noRecordsTemplate={noRecordsTemplate} popupHeight="270px" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Dropdown Tree</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='sample' style="margin: 20px auto 0; width:250px;">
        <div id='loader'>Loading....</div>
    </div>
</body>

</html>

Action failure template

The Dropdown Tree provides an option to custom design the popup list content using actionFailureTemplate property, when the data fetch request fails at the remote server.

In the following sample, when the data fetch request fails, the Dropdown Tree displays the notification.

import { DataManager, ODataV4Adaptor, Query } from '@syncfusion/ej2-data';
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
    let data = new DataManager({
        url: 'https://services.odata.org/V4/Northwind/Northwind.svcs',
        adaptor: new ODataV4Adaptor,
        crossDomain: true,
    });
    let query = new Query().from('Employees').select('EmployeeID,FirstName,Title').take(5);
    let query1 = new Query().from('Orders').select('OrderID,EmployeeID,ShipName').take(5);
    let fields = {
        dataSource: data, query: query, value: 'EmployeeID', text: 'FirstName', hasChildren: 'EmployeeID',
        child: { dataSource: data, query: query1, value: 'OrderID', parentValue: 'EmployeeID', text: 'ShipName' }
    };
    function actionFailureTemplate() {
        return (<div className='action-failure'> Data fetch request fails </div>);
    }
    return (<DropDownTreeComponent fields={fields} actionFailureTemplate={actionFailureTemplate} placeholder="Select an employee" popupHeight="200px" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
import { DataManager, ODataV4Adaptor, Query } from '@syncfusion/ej2-data';
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
  let data: DataManager = new DataManager({
    url: 'https://services.odata.org/V4/Northwind/Northwind.svcs',
    adaptor: new ODataV4Adaptor,
    crossDomain: true,
  });
  let query: Query = new Query().from('Employees').select('EmployeeID,FirstName,Title').take(5);
  let query1: Query = new Query().from('Orders').select('OrderID,EmployeeID,ShipName').take(5);
  let fields: object = {
    dataSource: data, query: query, value: 'EmployeeID', text: 'FirstName', hasChildren: 'EmployeeID',
    child: { dataSource: data, query: query1, value: 'OrderID', parentValue: 'EmployeeID', text: 'ShipName' }
  };
  function actionFailureTemplate(): JSX.Element {
    return (<div className='action-failure'> Data fetch request fails </div>);
  }
  return (<DropDownTreeComponent fields={fields} actionFailureTemplate={actionFailureTemplate} placeholder="Select an employee" popupHeight="200px" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Dropdown Tree</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='sample' style="margin: 20px auto 0; width:250px;">
        <div id='loader'>Loading....</div>
    </div>
</body>

</html>

Custom template to show selected items in input

In Dropdown Tree, while selecting more than one items via checkbox or multi selection support, all the selected items will be displayed in the input. Instead of displaying all the selected item text, a custom template can be displayed by setting the the mode property as Custom and customTemplate property.

When the mode property is set to Custom, the Dropdown Tree displays the default template value (${value.length} item(s) selected), such as 1 item(s) selected or 2 item(s) selected. The default template can be customized by setting customTemplate property.

In the following sample, the Dropdown Tree is rendered with default value of the customTemplate property like “1 item(s) selected or 2 item(s) selected”.

import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
    let data = [
        { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
        { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
        { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
        { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
        { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
        { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
        { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
        { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
        { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
        { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
    ];
    let fields = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
    let showCheckBox = true;
    let treeSettings = { autoCheck: true };
    let customTemplate = "${value.length} item(s) selected";
    return (<DropDownTreeComponent fields={fields} treeSettings={treeSettings} customTemplate={customTemplate} showCheckBox={showCheckBox} mode="Custom" placeholder="Select an employee" popupHeight="200px" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
  let data: { [key: string]: Object }[] = [
    { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
    { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
    { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
    { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
    { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
    { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
    { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
    { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
    { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
    { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
  ];
  let fields: object = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
  let showCheckBox: boolean = true;
  let treeSettings: Object = { autoCheck: true };
  let customTemplate: string = "${value.length} item(s) selected";
  return (<DropDownTreeComponent fields={fields} treeSettings={treeSettings} customTemplate={customTemplate} showCheckBox={showCheckBox} mode="Custom" placeholder="Select an employee" popupHeight="200px" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Dropdown Tree</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='sample' style="margin: 20px auto 0; width:250px;">
        <div id='loader'>Loading....</div>
    </div>
</body>

</html>

In the following sample, the Dropdown Tree is rendered with custom value of the customTemplate property like Selected items count: 2.

import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
    let data = [
        { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
        { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
        { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
        { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
        { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
        { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
        { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
        { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
        { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
        { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
    ];
    let fields = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
    let showCheckBox = true;
    let treeSettings = { autoCheck: true };
    let customTemplate = "Selected items count: ${value.length} item(s) ";
    return (<DropDownTreeComponent fields={fields} treeSettings={treeSettings} customTemplate={customTemplate} showCheckBox={showCheckBox} mode="Custom" placeholder="Select an employee" popupHeight="200px" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
import { DropDownTreeComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
function App() {
  let data: { [key: string]: Object }[] = [
    { "id": 1, "name": "Steven Buchanan", "job": "General Manager", "hasChild": true, "expanded": true },
    { "id": 2, "pid": 1, "name": "Laura Callahan", "job": "Product Manager", "hasChild": true },
    { "id": 3, "pid": 2, "name": "Andrew Fuller", "job": "Team Lead", "hasChild": true },
    { "id": 4, "pid": 3, "name": "Anne Dodsworth", "job": "Developer" },
    { "id": 10, "pid": 3, "name": "Lilly", "job": "Developer", "status": "online" },
    { "id": 5, "pid": 1, "name": "Nancy Davolio", "job": "Product Manager", "hasChild": true },
    { "id": 6, "pid": 5, "name": "Michael Suyama", "job": "Team Lead", "hasChild": true },
    { "id": 7, "pid": 6, "name": "Robert King", "job": "Developer " },
    { "id": 11, "pid": 6, "name": "Mary", "job": "Developer " },
    { "id": 9, "pid": 1, "name": "Janet Leverling", "job": "HR" }
  ];
  let fields: object = { dataSource: data, value: 'id', text: 'name', parentValue: "pid", hasChildren: 'hasChild' };
  let showCheckBox: boolean = true;
  let treeSettings: Object = { autoCheck: true };
  let customTemplate: string = "Selected items count: ${value.length} item(s) ";
  return (<DropDownTreeComponent fields={fields} treeSettings={treeSettings} customTemplate={customTemplate} showCheckBox={showCheckBox} mode="Custom" placeholder="Select an employee" popupHeight="200px" />);
}
export default App;
ReactDOM.render(<App />, document.getElementById('sample'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Dropdown Tree</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='sample' style="margin: 20px auto 0; width:250px;">
        <div id='loader'>Loading....</div>
    </div>
</body>

</html>