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Position popup open in JavaScript (ES5) DropDownButton control

08 May 2023 / 1 minute to read

Popup open position can be changed according to the requirement. Popup open position can be changed in open event by setting top and left for the popup element.

In the following example, the top position of the popup element is changed in open event.

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//Initialize action items.
var items = [
        text: 'Cut'
        text: 'Copy'
        text: 'Paste'

// initialize DropDownButton component
var drpDownBtn = new ej.splitbuttons.DropDownButton({
    items: items,
    cssClass: 'e-caret-up',
    open: onOpen

// Render initialized DropDownButton.

function onOpen(args) { = drpDownBtn.element.getBoundingClientRect().top - args.element.parentElement.offsetHeight +'px';
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<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 DropDownButton</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="//" rel="stylesheet">
    <link href="//" rel="stylesheet">
    <link href="//" rel="stylesheet">
    <link href="//" rel="stylesheet">
    <link href="styles.css" rel="stylesheet">
<script src="" type="text/javascript"></script>

    <div id="container">
        <button id="element">Clipboard</button>

var ele = document.getElementById('container');
if(ele) { = "visible";
<script src="index.js" type="text/javascript"></script>
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#container {
    visibility: hidden;

#loader {
  color: #008cff;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;

button {
  margin: 25% 5px 20px 30%;

.e-caret-up .e-caret::before {
  content: '\e918';