Group header in EJ2 JavaScript Drop down list control

2 May 20234 minutes to read
The following example demonstrate about how to disable the Fixed group header in DropDownList through CSS by using visibility attribute.
index.js
index.html
var vegetableData = [
    { Vegetable: 'Cabbage', Category: 'Leafy and Salad', Id: 'item1' },
    { Vegetable: 'Spinach', Category: 'Leafy and Salad', Id: 'item2' },
    { Vegetable: 'Wheat grass', Category: 'Leafy and Salad', Id: 'item3' },
    { Vegetable: 'Yarrow', Category: 'Leafy and Salad', Id: 'item4' },
    { Vegetable: 'Pumpkins', Category: 'Leafy and Salad', Id: 'item5' },
    { Vegetable: 'Chickpea', Category: 'Beans', Id: 'item6' },
    { Vegetable: 'Green bean', Category: 'Beans', Id: 'item7' },
    { Vegetable: 'Horse gram', Category: 'Beans', Id: 'item8' },
    { Vegetable: 'Garlic', Category: 'Bulb and Stem', Id: 'item9' },
    { Vegetable: 'Nopal', Category: 'Bulb and Stem', Id: 'item10' },
    { Vegetable: 'Onion', Category: 'Bulb and Stem', Id: 'item11' }
];
//initiate the DropDownList
var vegetables = new ej.dropdowns.DropDownList({
    //set the grouped data to dataSource property
    dataSource: vegetableData,
    // map the groupBy field with Category column
    fields: { groupBy: 'Category', text: 'Vegetable', value: 'Id' },
    // set the placeholder to the DropDownList input
    placeholder: "Select a vegetable",
    // Set the popup list height
    popupHeight: '200px'
});
//render the DropDownList component
vegetables.appendTo('#ddlelement');
<!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="https://cdn.syncfusion.com/ej2/25.1.35/ej2-base/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-dropdowns/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container" style="margin:0 auto; width:250px;">
        <br>
        <input type="text" id="ddlelement">
    </div>


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