Populate menu items with data source in EJ2 TypeScript Context menu control

2 May 20234 minutes to read

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.

import { Record, data } from './datasource.ts';
import { ContextMenu, MenuItemModel, ContextMenuModel, MenuEventArgs } from '@syncfusion/ej2-navigations';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

let record: Record;
let menuItems: MenuItemModel[] = [];

// Iterate data from 'datasource.ts' to construct menu item model.
for (let i: number = 0; i < data.length; i++) {
    record = data[i] as Record;
    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 });
    }
}

// Initialize ContextMenu options.
let menuOptions: ContextMenuModel = {
    target: '#target',
    items: menuItems
};

// Initialize ContextMenu component.
let menuObj: ContextMenu = new ContextMenu(menuOptions, '#contextmenu');

// To insert an item after the particular item.
menuObj.insertAfter([{separator: true}], 'Sort by');
menuObj.insertAfter([{separator: true}], 'New');
<!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="https://cdn.syncfusion.com/ej2/27.2.2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/material.css" rel="stylesheet" />
    
    <!--style reference from app-->
    <link href="styles.css" rel="stylesheet" />

    <!--system js reference and configuration-->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id='loader'>LOADING....</div>
    <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>
</body>

</html>