Electron - Rederer process can use Node feature

Setting nodeIntegration true in webPreferences section in main.js will allow to use Node feature in renderer process such as require. And setting webSecurity false will disable CORS in a renderer process.

  mainWindow = new BrowserWindow({
    width: 1024,
    height: 600,
    webPreferences: {
      nodeIntegration: true,
      webSecurity: false
    }
  });

If a renderer process needs to access the self signed web API, the following code will allow to access it.

app.on(
  "certificate-error",
  (event, webContents, url, error, certificate, callback) => {
    // On certificate error we disable default behaviour (stop loading the page)
    // and we then say "it is all fine - true" to the callback
    event.preventDefault();
    callback(true);
  }
);