index.js

//const electron = require('electron');
const url = require('url');
const path = require('path');
var fs = require('fs');
//var sqlite3 = require('sqlite3').verbose();

const {app, BrowserWindow, ipcMain, Menu, MenuItem} = require('electron');

const menu = new Menu()
menu.append(new MenuItem({ label: 'Hello' }))
menu.append(new MenuItem({ type: 'separator' }))
menu.append(new MenuItem({ label: 'Electron', type: 'checkbox', checked: true }))

let mainWindow;

app.on('ready' , function(){
    win = new BrowserWindow({
        width: 800, 
        height: 600,
        minWidth: 200,
        minHeight: 200,
    })
    win.on('closed', () => {
        win = null
    });
	
	win.loadURL(url.format({
        pathname: path.join(__dirname, 'index.html'),
        protocol: 'file:',
        slashes: true
    }));
    
    ipcMain.on('get-dashboard-url', (event, arg) => {
        fs.readFile('./dashboard.txt', 'utf-8', (err, data) => {
            event.sender.send('asynchronous-reply', data);
        });
    });

    var graphName = "";

    ipcMain.on('Name', (event, arg) => {
        graphName = arg;
    });

    ipcMain.on('importData', (event, arg) => {
        fs.readFile(graphName, 'utf-8', (err, data) => {
            event.sender.send('responseGraph', data);
        });
    });

    ipcMain.on('exportData', (event, arg) => {
        fs.writeFile(graphName, arg)
    });

    ipcMain.on('show-context-menu', (event, arg) => {
		const menu = new Menu();
		menu.append(new MenuItem ({
			label: 'Item ' + arg,
	}));
	 	menu.popup(menu)
  	});
});