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Populate menu items with data source

To bind local data source to the ContextMenu, menu items are populated from data source and mapped to items property.

The below example demonstrates how to bind local data source to the ContextMenu and separator is added using insertAfter method.

Source
Preview
index.js
index.html
styles.css
ej.base.enableRipple(true);

var data = [
    { id: 1, parentId: null, text: 'View' },
    { id: 2, parentId: null, text: 'Sort by' },
    { id: 3, parentId: null, text: '' },
    { id: 4, parentId: null, text: 'New' },
    { id: 5, parentId: null, text: '' },
    { id: 6, parentId: null, text: 'Display Settings' },
    { id: 7, parentId: null, text: 'Personalize' },
    //first level child
    { id: 8, parentId: 1, text: 'Large Icons' },
    { id: 9, parentId: 1, text: 'Medium Icons' },
    { id: 10, parentId: 1, text: 'Small Icons' },
    { id: 11, parentId: 2, text: 'Name' },
    { id: 12, parentId: 2, text: 'Size' },
    { id: 13, parentId: 4, text: 'Folder' },
    { id: 14, parentId: 4, text: 'Shortcut' },
    { id: 15, parentId: 4, text: '' },
    { id: 16, parentId: 4, text: 'Contact' }
];

var record;
var menuItems = [];
for (var i = 0; i < data.length; i++) {
    record = data[i];
    if (record.parentId) {
        if (!menuItems[record.parentId - 1].items) {
            menuItems[record.parentId - 1].items = []
        }
        menuItems[record.parentId - 1].items.push({ text: record.text });
    } else {
        menuItems.push({ text: record.text });
    }
}

var menuOptions = {
    target: '#target',
    items: menuItems,
    beforeItemRender: (args) => {
        if (!args.item.text) {
            args.element.classList.add('e-separator');
        }
    }
};
var menuObj = new ej.navigations.ContextMenu(menuOptions, '#contextmenu');
<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    <meta name="description" content="Essential JS 2">
    <meta name="author" content="Syncfusion">
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/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-popups/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet">
    
    <!--style reference from app-->
    <link href="styles.css" rel="stylesheet">

    <!--system js reference and configuration-->
    
    
<script src="//cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
    
    <div id="container">
        <!--target element-->
        <div id="target">Right click / Touch hold to open the ContextMenu</div>
        <!--element which is going to render-->
        <ul id="contextmenu"></ul>        
    </div>


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

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

button {
  margin: 20px 0 0 5px;
}

#target {
  border: 1px dashed;
  height: 150px;
  padding: 10px;
  position: relative;
  text-align: justify;
  color: gray;
  user-select: none;
}