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Add item in between in DropDownList

You can add item in between based on item index. If you add new item without item index, item will be added as last item in list.

The following example demonstrate how to add item in between in DropDownList.

Source
Preview
app.ts
index.html
import { DropDownList } from '@syncfusion/ej2-dropdowns';

//define the array of complex data
let sportsData: { [key: string]: Object }[] = [
    { Id: 'game1', Game: 'Badminton' },
    { Id: 'game2', Game: 'Football' },
    { Id: 'game3', Game: 'Tennis' }
];

//initiate the DropDownList
let dropDownListObject: DropDownList = new DropDownList({
    // bind the sports Data to datasource property
    dataSource: sportsData,
    // maps the appropriate column to fields property
    fields: { text: 'Game', value: 'Id' },
    //set the placeholder to DropDownList input
    placeholder:"Select a game"
});
//render the component
dropDownListObject.appendTo('#ddlelement');

// add item at first
document.getElementById('first').onclick = () => {
  dropDownListObject.addItem({Id: 'game0', Game: 'Hockey'}, 0);
}

// add item in between
document.getElementById('between').onclick = () => {
  dropDownListObject.addItem({Id: 'game4', Game: 'Golf'}, 2);
}

// add item at last
document.getElementById('last').onclick = () => {
  dropDownListObject.addItem({Id: 'game5', Game: 'Cricket'});
}
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 DropDownList</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="styles.css" rel="stylesheet" />
   <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-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>
</head>
<body>
    <div id='loader'>LOADING....</div>
    <div id='container' style="margin:0 auto; width:250px;">
        <br>
        <input type="text" id='ddlelement' />
 
    <div style='padding: 50px 0'>
      <button id='first' class="e-control e-btn"> add item (Hockey) in first</button>
    </div>
    <div style='padding-left: 50px 0'>
      <button id='between' class="e-control e-btn"> add item (Golf) in between</button>
    </div>
    <div style='padding: 50px 0'>
      <button id='last' class="e-control e-btn"> add item (Cricket) in last</button>
    </div>
</div>
</body>

</html>