Electron launch and print a hidden webview

callPrint.js

import { ipcRenderer } from 'electron'
ipcRenderer.send('print', { device: 'printer name', width: 210 })

print.js

// imported from main/index.js
import { BrowserWindow, ipcMain } from 'electron'

const isDev = process.env.NODE_ENV === 'development'
const baseUrl = isDev
    ? 'http://localhost:9080#'
    : `file://${__dirname}/index.html#`

ipcMain.on('print', (event, payload) => {
    // multiple printers are in use so printer name is sent in as "device"
    const { device, width } = payload
    let win = new BrowserWindow({ width, height: 1000, show: isDev })

    if (!isDev) win.once('ready-to-show', () => win.hide())

    win.loadURL(`${baseUrl}/print?device=${device}`)
    win.webContents.on('did-finish-load', () => {
        win.webContents.print({ silent: true, deviceName: device }, (success) => {
            win.close()
            win = null
        })
    })
})