app.js

const {
  app, BrowserWindow, TouchBar, nativeImage,
} = require('electron');

const { TouchBarScrubber, TouchBarButton } = TouchBar;

const image = nativeImage.createFromPath('./m.png').resize({ height: 30 });

app.on('ready', () => {
  const win = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      nodeIntegration: true,
    },
  });

  const button = new TouchBarButton({
    label: 'Emoji works aswell 🦁',
    backgroundColor: '#7851A9',
    click: () => {},
  });

  const touchBar = new TouchBar({
    items: [
      new TouchBarScrubber({
        items: [{ label: 'foo' }, { label: 'bar' }, {
          icon: image,
        }],
        selectedStyle: 'outline',
        mode: 'free',
        showArrowButtons: true,
      }),
    ],
    escapeItem: button,
  });
  win.loadFile('index.html');
  win.webContents.openDevTools();
  win.setTouchBar(touchBar);
});