const DarkModeStorageName = 'nfp_sites_darkmode'

module.exports.darkIsOn = localStorage.getItem(DarkModeStorageName)

module.exports.toggleDarkMode = function() {
  module.exports.darkIsOn = !module.exports.darkIsOn
  if (this.darkIsOn) {
    localStorage.setItem(DarkModeStorageName, true)
  } else {
    localStorage.removeItem(DarkModeStorageName)
  }
  document.body.className = (module.exports.darkIsOn ? 'nightmode ' : 'daymode ')
    + (window.supportsavif ? 'avifsupport' : 'jpegonly')
}