How to disable fixed group header in EJ2 JavaScript Dropdown List

04 Sep 20263 minutes to read

The following example demonstrates how to disable the fixed group header in the DropDownList through CSS by using the visibility attribute.

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/ej2/35.1.37/ej2-base/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/35.1.37/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/35.1.37/ej2-dropdowns/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/35.1.37/dist/ej2.min.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>