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How to add custom menu item in context menu

The context menu can be customized using the contextMenuSettings, menuOpen, and menuClick events.

The following example shows adding a custom item in the context menu.

The contextMenuSettings is used to add new menu item. The menuOpen event is used to add the icon to the new menu item. The menuClick event is used to add an event handler to the new menu item.

Source
Preview
app.ts
index.html
index.css
import { FileManager, Toolbar, NavigationPane, DetailsView, MenuClickEventArgs, MenuOpenEventArgs } from '@syncfusion/ej2-filemanager';

FileManager.Inject(Toolbar, NavigationPane, DetailsView)

let hostUrl: string = 'https://ej2-aspcore-service.azurewebsites.net/';
// initialize File Manager component and add custom item to contextmenu
let filemanagerInstance: FileManager = new FileManager({
    ajaxSettings: {
        url: hostUrl + 'api/FileManager/FileOperations',
        getImageUrl: hostUrl + 'api/FileManager/GetImage',
        uploadUrl: hostUrl + 'api/FileManager/Upload',
        downloadUrl: hostUrl + 'api/FileManager/Download'
    },
    // Custom menu item added to context menu
    contextMenuSettings: {
     file: ["Custom", "Open", "|", "Delete", "Download", "Rename", "|", "Details"],
     folder: ["Custom", "Open", "|", "Delete", "Download", "Rename", "|", "Details"],
     layout: ["Custom", "SortBy", "View", "Refresh", "|", "NewFolder", "Upload", "|", "Details", "|", "SelectAll"],
     visible: true
    },
    menuOpen: menuOpen,
    menuClick: menuClick
});

// Icon added to custom menu item
function menuOpen(args: MenuOpenEventArgs) {
    for(let i: number = 0; i<args.items.length; i++) {
        if(args.items[i].id === this.element.id +'_cm_custom') {
            args.items[i].iconCss= 'e-icons e-fe-tick';
        }
    }
}

// event for custom menu item
function menuClick(args: MenuClickEventArgs) {
    if (args.item.text === 'Custom') {
        alert('You have clicked custom menu item')
    }
}

// render initialized FileManager
filemanagerInstance.appendTo('#filemanager');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 File Manager</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 File Manager Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/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-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-layouts/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-grids/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-filemanager/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id="filemanager"></div>
</body>
</html>