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DropDownList options with tooltip in JavaScript (ES5) DropDownList control

You can achieve this behavior by using ej2-tooltip component. When the mouse hover on the DropDownList option that tooltip display some details related to hovered list item.

Source
Preview
index.js
index.html
//Initialize DropDownList component
var listObj = new ej.dropdowns.DropDownList({
    // define the array of JSON data
    dataSource: [
        { id: '1', text: 'Australia', content: 'National sports is Cricket' },
        { id: '2', text: 'Bhutan', content: 'National sports is Archery' },
        { id: '3', text: 'China', content: 'National sports is Table Tennis' },
        { id: '4', text: 'Cuba', content: 'National sports is Baseball' },
        { id: '5', text: 'India', content: 'National sports is Hockey' },
        { id: '6', text: 'Spain', content: 'National sports is Football' },
        { id: '7', text: 'United States', content: 'National sports is Baseball' }
    ],
    // map the appropriate column to fields property
    fields: { text: 'text', tooltip: 'id' },
    // set the placeholder to the DropDownList input
    placeholder: 'Select a country',
    // bind the DropDownList close event
    close: () => { tooltip.close(); }
});
listObj.appendTo('#ddltooltip');
//Initialize Tooltip component
var tooltip = new ej.popups.Tooltip({
    // default content of tooltip
    content: 'Loading...',
    // set target element to tooltip
    target: '.e-list-item',
    // set position of tooltip
    position: 'top center',
    // bind beforeRender event
    beforeRender: onBeforeRender
});
tooltip.appendTo('body');
function onBeforeRender(args) {
    // get the target element
    var listElement = document.getElementById('ddltooltip');
    var result = listElement.ej2_instances[0].dataSource;
    var i;
    for (i = 0; i < result.length; i++) {
        if (result[i].text === args.target.textContent) {
            this.content = result[i].content;
            this.dataBind();
            break;
        }
    }
}
<!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://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container" style="margin:0 auto; width:250px;">
        <br>
        <div id="Tooltip" class="e-prevent-select">
            <input type="text" id="ddltooltip">
        </div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>