emulate-value-change-events.js

const BrowserEvent = (eventName = '') => {
  let event

  if (typeof Event === 'function') {
    event = new Event(eventName)
  } else {
    event = document.createEvent('Event')
    event.initEvent(eventName, true, true)
  }

  return event
}

function updateInputValue (element, newValue) {
  element.value = newValue
  element.dispatchEvent(BrowserEvent('input'))
  element.dispatchEvent(BrowserEvent('change'))
}