text: import { btn_new, btn_open, btn_save, btn_print, btn_help, btn_calculate } from './utils/dom.util'
  import { newFile, showFileDialog, saveFile, printFile, calculate } from './utils/dom.util'
  
  function bindEventHandlers() {
    btn_new.onclick = newFile
    btn_open.onclick = showFileDialog
    btn_save.onclick = saveFile
    btn_print.onclick = printFile
    // btn_help.onclick = helpModal
    btn_calculate.onclick = calculate
  }
  
  function initApp() {
    bindEventHandlers()
  }
  
  initApp()