export function extractNumber (s: string) {
  var match = /(\+?[0-9]{4,})/.exec(s)
  if (!match) {
    return undefined
  }

  var number = match[1]
  if (number.startsWith('+')) {
    number = number.replace('+', '00')
  }

  return number
}

export function fireChangeEvents (element: Element) {
  var changeEvent = null
  changeEvent = document.createEvent('HTMLEvents')
  changeEvent.initEvent('input', true, true)
  element.dispatchEvent(changeEvent)
  console.debug('input event dispatched for element: ' + element.id)
  changeEvent = document.createEvent('HTMLEvents')
  changeEvent.initEvent('keyup', true, true)
  element.dispatchEvent(changeEvent)
  console.debug('keyup event dispatched for element: ' + element.id)
  changeEvent = document.createEvent('HTMLEvents')
  changeEvent.initEvent('change', true, true)
  element.dispatchEvent(changeEvent)
  console.debug('change event dispatched for element: ' + element.id)
}