electron-reload is the simplest way to load contents of all active BrowserWindows within electron when the source files are changed.

To add electron-reload to your existing project, type

 npm i electron-reload --save-dev 

Initialize this module with desired glob or file path to watch and let it refresh electron browser windows as targets are changed

const electron = require('electron');
const path = require('path');
const url = require('url');

const { app, BrowserWindow } = electron;

require('electron-reload')(__dirname);

let win;

app.on('ready', createWindow);

Here is a small video showing electron-reload in action.

You can download the source code for this article here.