content: import Menu from './menu'
  import React from 'react'
  import ReactDOM from 'react-dom'
  import AboutDialog from '../dialogs/AboutDialog'
  import { registerKeypress } from '../app/keypress'
  import { trackEvent } from '../app/event_tracking'
  
  let helpMenu = new Menu('help', {
    init: () => {
      // Attach React trigger here.
      document.querySelector('#about-streetmix').addEventListener('pointerdown', _mountReactComponent)
  
      function _mountReactComponent (event) {
        event.preventDefault()
        const mountNode = document.getElementById('dialogs-react')
        ReactDOM.render(<AboutDialog />, mountNode)
      }
    },
    onShow: () => {
      trackEvent('Interaction', 'Open help menu', null, null, false)
    }
  })
  
  registerKeypress('?', { shiftKey: 'optional' }, () => {
    helpMenu.onClick()
  })
  