Opens a select in the touchbar

touchbar-select.js

#!/usr/bin/env electron
const { app, BrowserWindow, TouchBar } = require("electron")

app.whenReady().then(() => {
  const window = new BrowserWindow({
    titleBarStyle: "hiddenInset",
    width: 0,
    height: 0,
  })
  window.loadURL("about:blank")
  window.setTouchBar(
    new TouchBar({
      items: process.argv.slice(2).map(
        label =>
          new TouchBar.TouchBarButton({
            label,
            click: () => {
              console.log(label)
              app.exit(0)
            },
          })
      ),
    })
  )
})

Run

curl -s https://gist.githubusercontent.com/betafcc/3e0d5b0d99b7fae115cf371275ec8ca8/raw/928c3e180d2c7ef18b8dbabfa31d481f96287ac1/touchbar-select.js | npx electron '/dev/stdin' foo bar biz baz

Install

npm i -g electron
curl https://gist.githubusercontent.com/betafcc/3e0d5b0d99b7fae115cf371275ec8ca8/raw/928c3e180d2c7ef18b8dbabfa31d481f96287ac1/touchbar-select.js > /usr/local/bin/touchbar-select
chmod +x /usr/local/bin/touchbar-select

With applescript you can easily create a select dialog by running osascript -e 'choose from list {"foo","bar","biz","baz"}'.
Surprisingly, there is nothing nearly as easy if you want to show the dialog in touchbar instead.

With this electron script you just touchbar-select foo bar biz baz and that's it.