/**
 * A const enum that includes all non-printable string values one can expect from $event.key.
 * For example, this enum includes values like "CapsLock", "Backspace", and "AudioVolumeMute",
 * but does not include values like "a", "A", "#", "é", or "¿".
 * Auto generated from MDN: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values#Speech_recognition_keys
 */
export declare const enum Key {
  /**
   * The user agent wasn't able to map the event's virtual keycode to a
   * specific key value.
   * This can happen due to hardware or software constraints, or because of
   * constraints around the platform on which the user agent is running.
   */
  Unidentified = 'Unidentified',

  /** The Alt (Alternative) key. */
  Alt = 'Alt',

  /**
   * The AltGr or AltGraph (Alternate Graphics) key.
   * Enables the ISO Level 3 shift modifier (where Shift is the
   * level 2 modifier).
   */
  AltGraph = 'AltGraph',

  /**
   * The Caps Lock key. Toggles the capital character lock on and
   * off for subsequent input.
   */
  CapsLock = 'CapsLock',

  /**
   * The Control, Ctrl, or Ctl key. Allows
   * typing control characters.
   */
  Control = 'Control',

  /**
   * The Fn (Function modifier) key. Used to allow generating
   * function key (F1–F15, for instance) characters on
   * keyboards without a dedicated function key area. Often handled in
   * hardware so that events aren't generated for this key.
   */
  Fn = 'Fn',

  /**
   * The FnLock or F-Lock (Function Lock) key.Toggles
   * the function key mode described by "Fn" on and off. Often
   * handled in hardware so that events aren't generated for this key.
   */
  FnLock = 'FnLock',

  /** The Hyper key. */
  Hyper = 'Hyper',

  /**
   * The Meta key. Allows issuing special command inputs. This is
   * the Windows logo key, or the Command or
   * ⌘ key on Mac keyboards.
   */
  Meta = 'Meta',

  /**
   * The NumLock (Number Lock) key. Toggles the numeric keypad
   * between number entry some other mode (often directional arrows).
   */
  NumLock = 'NumLock',

  /**
   * The Scroll Lock key. Toggles between scrolling and cursor
   * movement modes.
   */
  ScrollLock = 'ScrollLock',

  /**
   * The Shift key. Modifies keystrokes to allow typing upper (or
   * other) case letters, and to support typing punctuation and other special
   * characters.
   */
  Shift = 'Shift',

  /** The Super key. */
  Super = 'Super',

  /** The Symbol modifier key (found on certain virtual keyboards). */
  Symbol = 'Symbol',

  /** The Symbol Lock key. */
  SymbolLock = 'SymbolLock',

  /**
   * The Enter or ↵ key (sometimes labeled
   * Return).
   */
  Enter = 'Enter',

  /** The Horizontal Tab key, Tab. */
  Tab = 'Tab',

  /** The down arrow key. */
  ArrowDown = 'ArrowDown',

  /** The left arrow key. */
  ArrowLeft = 'ArrowLeft',

  /** The right arrow key. */
  ArrowRight = 'ArrowRight',

  /** The up arrow key. */
  ArrowUp = 'ArrowUp',

  /** The End key. Moves to the end of content. */
  End = 'End',

  /** The Home key. Moves to the start of content. */
  Home = 'Home',

  /**
   * The Page Down (or PgDn) key. Scrolls down or
   * displays the next page of content.
   */
  PageDown = 'PageDown',

  /**
   * The Page Up (or PgUp) key. Scrolls up or displays
   * the previous page of content.
   */
  PageUp = 'PageUp',

  /**
   * The Backspace key. This key is labeled Delete on
   * Mac keyboards.
   */
  Backspace = 'Backspace',

  /** The Clear key. Removes the currently selected input. */
  Clear = 'Clear',

  /** The Copy key (on certain extended keyboards). */
  Copy = 'Copy',

  /** The Cursor Select key, CrSel. */
  CrSel = 'CrSel',

  /** The Cut key (on certain extended keyboards). */
  Cut = 'Cut',

  /** The Delete key, Del. */
  Delete = 'Delete',

  /**
   * Erase to End of Field. Deletes all characters from the current cursor
   * position to the end of the current field.
   */
  EraseEof = 'EraseEof',

  /** The ExSel (Extend Selection) key. */
  ExSel = 'ExSel',

  /**
   * The Insert key, Ins. Toggles between inserting and
   * overwriting text.
   */
  Insert = 'Insert',

  /** Paste from the clipboard. */
  Paste = 'Paste',

  /** Redo the last action. */
  Redo = 'Redo',

  /** Undo the last action. */
  Undo = 'Undo',

  /**
   * The Accept, Commit, or OK key or
   * button. Accepts the currently selected option or input method sequence
   * conversion.
   */
  Accept = 'Accept',

  /** The Again key. Redoes or repeats a previous action. */
  Again = 'Again',

  /** The Attn (Attention) key. */
  Attn = 'Attn',

  /** The Cancel key. */
  Cancel = 'Cancel',

  /**
   * Shows the context menu. Typically found between the
   * Windows (or OS) key and the Control key
   * on the right side of the keyboard.
   */
  ContextMenu = 'ContextMenu',

  /**
   * The Esc (Escape) key. Typically used as an exit, cancel, or
   * "escape this operation" button. Historically, the Escape character was
   * used to signal the start of a special control sequence of characters
   * called an "escape sequence."
   */
  Escape = 'Escape',

  /** The Execute key. */
  Execute = 'Execute',

  /**
   * The Find key. Opens an interface (typically a dialog box) for
   * performing a find/search operation.
   */
  Find = 'Find',

  /** The Finish key. */
  Finish = 'Finish',

  /**
   * The Help key. Opens or toggles the display of help
   * information.
   */
  Help = 'Help',

  /**
   * The Pause key. Pauses the current application or state, if
   * applicable.
   * Note: This shouldn't be confused with the
   * "MediaPause" key value, which is used for media
   * controllers, rather than to control applications and processes.
   */
  Pause = 'Pause',

  /**
   * The Play key. Resumes a previously paused application, if
   * applicable.
   * Note: This shouldn't be confused with the
   * "MediaPlay" key value, which is used for media
   * controllers, rather than to control applications and processes.
   */
  Play = 'Play',

  /** The Props (Properties) key. */
  Props = 'Props',

  /** The Select key. */
  Select = 'Select',

  /** The ZoomIn key. */
  ZoomIn = 'ZoomIn',

  /** The ZoomOut key. */
  ZoomOut = 'ZoomOut',

  /**
   * The Brightness Down key. Typically used to reduce the brightness of the
   * display.
   */
  BrightnessDown = 'BrightnessDown',

  /**
   * The Brightness Up key. Typically increases the brightness of the
   * display.
   */
  BrightnessUp = 'BrightnessUp',

  /**
   * The Eject key. Ejects removable media (or toggles an optical
   * storage device tray open and closed).
   */
  Eject = 'Eject',

  /** The LogOff key. */
  LogOff = 'LogOff',

  /**
   * The Power button or key, to toggle power on and off.
   * Note: Not all systems pass this key through to the
   * user agent.
   */
  Power = 'Power',

  /**
   * The PowerOff or PowerDown key. Shuts off the
   * system.
   */
  PowerOff = 'PowerOff',

  /**
   * The PrintScreen or PrtScr key. Sometimes
   * SnapShot. Captures the screen and prints it or saves it to
   * disk.
   */
  PrintScreen = 'PrintScreen',

  /**
   * The Hibernate key. This saves the state of the computer to
   * disk and then shuts down; the computer can be returned to its previous
   * state by restoring the saved state information.
   */
  Hibernate = 'Hibernate',

  /**
   * The Standby key. (Also known as Suspend or
   * Sleep.) This turns off the display and puts the computer in a
   * low power consumption mode, without completely powering off.
   */
  Standby = 'Standby',

  /**
   * The WakeUp key. Used to wake the computer from the
   * hibernation or standby modes.
   */
  WakeUp = 'WakeUp',

  /**
   * The All Candidates key, which starts multi-candidate mode, in
   * which multiple candidates are displayed for the ongoing input.
   */
  AllCandidates = 'AllCandidates',

  /** The Alphanumeric key. */
  Alphanumeric = 'Alphanumeric',

  /**
   * The Code Input key, which enables code input mode, which lets
   * the user enter characters by typing their code points (their Unicode
   * character numbers, typically).
   */
  CodeInput = 'CodeInput',

  /** The Compose key. */
  Compose = 'Compose',

  /**
   * The Convert key, which instructs the IME to convert the
   * current input method sequence into the resulting character.
   */
  Convert = 'Convert',

  /**
   * A dead "combining" key; that is, a key which is used in tandem with
   * other keys to generate accented and other modified characters. If
   * pressed by itself, it doesn't generate a character.
   * If you wish to identify which specific dead key was pressed (in cases
   * where more than one exists), you can do so by examining the
   * KeyboardEvent's associated
   * compositionupdate event's
   * data property.
   */
  Dead = 'Dead',

  /**
   * The Final (Final Mode) key is used on some Asian keyboards to
   * enter final mode when using IMEs.
   */
  FinalMode = 'FinalMode',

  /**
   * Switches to the first character group on an
   * ISO/IEC 9995 keyboard. Each key may have multiple groups of characters, each in its own
   * column. Pressing this key instructs the device to interpret keypresses
   * as coming from the first column on subsequent keystrokes.
   */
  GroupFirst = 'GroupFirst',

  /**
   * Switches to the last character group on an
   * ISO/IEC 9995 keyboard.
   */
  GroupLast = 'GroupLast',

  /**
   * Switches to the next character group on an
   * ISO/IEC 9995 keyboard.
   */
  GroupNext = 'GroupNext',

  /**
   * Switches to the previous character group on an
   * ISO/IEC 9995 keyboard.
   */
  GroupPrevious = 'GroupPrevious',

  /** The Mode Change key. Toggles or cycles among input modes of IMEs. */
  ModeChange = 'ModeChange',

  /**
   * The Next Candidate function key. Selects the next possible match for the
   * ongoing input.
   */
  NextCandidate = 'NextCandidate',

  /**
   * The NonConvert ("Don't convert") key. This accepts the
   * current input method sequence without running conversion when using an
   * IME.
   */
  NonConvert = 'NonConvert',

  /**
   * The Previous Candidate key. Selects the previous possible match for the
   * ongoing input.
   */
  PreviousCandidate = 'PreviousCandidate',

  /** The Process key. Instructs the IME to process the conversion. */
  Process = 'Process',

  /**
   * The Single Candidate key. Enables single candidate mode (as opposed to
   * multi-candidate mode); in this mode, only one candidate is displayed at
   * a time.
   */
  SingleCandidate = 'SingleCandidate',

  /**
   * The Hangul (Korean character set) mode key, which toggles
   * between Hangul and English entry modes.
   */
  HangulMode = 'HangulMode',

  /**
   * Selects the Hanja mode, for converting Hangul characters to the more
   * specific Hanja characters.
   */
  HanjaMode = 'HanjaMode',

  /**
   * Selects the Junja mode, in which Korean is represented using single-byte
   * Latin characters.
   */
  JunjaMode = 'JunjaMode',

  /**
   * The Eisu key. This key's purpose is defined by the IME, but
   * may be used to close the IME.
   */
  Eisu = 'Eisu',

  /** The Hankaku (half-width characters) key. */
  Hankaku = 'Hankaku',

  /** The Hiragana key; selects Kana characters mode. */
  Hiragana = 'Hiragana',

  /** Toggles between the Hiragana and Katakana writing systems. */
  HiraganaKatakana = 'HiraganaKatakana',

  /** The Kana Mode (Kana Lock) key. */
  KanaMode = 'KanaMode',

  /**
   * The Kanji Mode key. Enables entering Japanese text using the
   * ideographic characters of Chinese origin.
   */
  KanjiMode = 'KanjiMode',

  /** The Katakana key. */
  Katakana = 'Katakana',

  /** The Romaji key; selects the Roman character set. */
  Romaji = 'Romaji',

  /** The Zenkaku (full width) characters key. */
  Zenkaku = 'Zenkaku',

  /** The Zenkaku/Hankaku (full width/half width) toggle key. */
  ZenkakuHanaku = 'ZenkakuHanaku',

  /** The first general-purpose function key, F1. */
  F1 = 'F1',

  /** The F2 key. */
  F2 = 'F2',

  /** The F3 key. */
  F3 = 'F3',

  /** The F4 key. */
  F4 = 'F4',

  /** The F5 key. */
  F5 = 'F5',

  /** The F6 key. */
  F6 = 'F6',

  /** The F7 key. */
  F7 = 'F7',

  /** The F8 key. */
  F8 = 'F8',

  /** The F9 key. */
  F9 = 'F9',

  /** The F10 key. */
  F10 = 'F10',

  /** The F11 key. */
  F11 = 'F11',

  /** The F12 key. */
  F12 = 'F12',

  /** The F13 key. */
  F13 = 'F13',

  /** The F14 key. */
  F14 = 'F14',

  /** The F15 key. */
  F15 = 'F15',

  /** The F16 key. */
  F16 = 'F16',

  /** The F17 key. */
  F17 = 'F17',

  /** The F18 key. */
  F18 = 'F18',

  /** The F19 key. */
  F19 = 'F19',

  /** The F20 key. */
  F20 = 'F20',

  /** The first general-purpose virtual function key. */
  Soft1 = 'Soft1',

  /** The second general-purpose virtual function key. */
  Soft2 = 'Soft2',

  /** The third general-purpose virtual function key. */
  Soft3 = 'Soft3',

  /** The fourth general-purpose virtual function key. */
  Soft4 = 'Soft4',

  /**
   * Presents a list of recently-used applications which lets the user change
   * apps quickly.
   */
  AppSwitch = 'AppSwitch',

  /** The Call key. Dials the number which has been entered. */
  Call = 'Call',

  /** The Camera key. Activates the camera. */
  Camera = 'Camera',

  /** The Focus key. Focuses the camera. */
  CameraFocus = 'CameraFocus',

  /** The End Call or Hang Up button. */
  EndCall = 'EndCall',

  /** The Back button. */
  GoBack = 'GoBack',

  /**
   * The Home button. Returns the user to the phone's main screen
   * (usually an application launcher).
   */
  GoHome = 'GoHome',

  /**
   * The Headset Hook key. This is typically actually a button on
   * the headset which is used to hang up calls and play or pause media.
   */
  HeadsetHook = 'HeadsetHook',

  /** The Redial button. Redials the last-called number. */
  LastNumberRedial = 'LastNumberRedial',

  /** The Notification key. */
  Notification = 'Notification',

  /**
   * A button which cycles among the notification modes: silent, vibrate,
   * ring, and so forth.
   */
  MannerMode = 'MannerMode',

  /** The Voice Dial key. Initiates voice dialing. */
  VoiceDial = 'VoiceDial',

  /** Switches to the previous channel. */
  ChannelDown = 'ChannelDown',

  /** Switches to the next channel. */
  ChannelUp = 'ChannelUp',

  /** Starts, continues, or increases the speed of fast forwarding the media. */
  MediaFastForward = 'MediaFastForward',

  /**
   * Pauses the currently playing media.
   * Note: Some older applications use
   * "Pause", but this is not correct.
   */
  MediaPause = 'MediaPause',

  /**
   * Starts or continues playing media at normal speed, if not already doing
   * so. Has no effect otherwise.
   */
  MediaPlay = 'MediaPlay',

  /** Toggles between playing and pausing the current media. */
  MediaPlayPause = 'MediaPlayPause',

  /** Starts or resumes recording media. */
  MediaRecord = 'MediaRecord',

  /** Starts, continues, or increases the speed of rewinding the media. */
  MediaRewind = 'MediaRewind',

  /**
   * Stops the current media activity (such as playing, recording, pausing,
   * forwarding, or rewinding). Has no effect if the media is currently
   * stopped already.
   */
  MediaStop = 'MediaStop',

  /** Seeks to the next media or program track. */
  MediaTrackNext = 'MediaTrackNext',

  /** Seeks to the previous media or program track. */
  MediaTrackPrevious = 'MediaTrackPrevious',

  /** Adjusts audio balance toward the left. */
  AudioBalanceLeft = 'AudioBalanceLeft',

  /** Adjusts audio balance toward the right. */
  AudioBalanceRight = 'AudioBalanceRight',

  /** Decreases the amount of bass. */
  AudioBassDown = 'AudioBassDown',

  /**
   * Reduces bass boosting or cycles downward through bass boost modes or
   * states.
   */
  AudioBassBoostDown = 'AudioBassBoostDown',

  /** Toggles bass boosting on and off. */
  AudioBassBoostToggle = 'AudioBassBoostToggle',

  /**
   * Increases the amount of bass boosting, or cycles upward through a set of
   * bass boost modes or states.
   */
  AudioBassBoostUp = 'AudioBassBoostUp',

  /** Increases the amount of bass. */
  AudioBassUp = 'AudioBassUp',

  /** Adjusts the audio fader toward the front. */
  AudioFaderFront = 'AudioFaderFront',

  /** Adjusts the audio fader toward the rear. */
  AudioFaderRear = 'AudioFaderRear',

  /** Selects the next available surround sound mode. */
  AudioSurroundModeNext = 'AudioSurroundModeNext',

  /** Decreases the amount of treble. */
  AudioTrebleDown = 'AudioTrebleDown',

  /** Increases the amount of treble. */
  AudioTrebleUp = 'AudioTrebleUp',

  /** Decreases the audio volume. */
  AudioVolumeDown = 'AudioVolumeDown',

  /** Mutes the audio. */
  AudioVolumeMute = 'AudioVolumeMute',

  /** Increases the audio volume. */
  AudioVolumeUp = 'AudioVolumeUp',

  /** Toggles the microphone on and off. */
  MicrophoneToggle = 'MicrophoneToggle',

  /** Decreases the microphone's input volume. */
  MicrophoneVolumeDown = 'MicrophoneVolumeDown',

  /** Mutes the microphone input. */
  MicrophoneVolumeMute = 'MicrophoneVolumeMute',

  /** Increases the microphone's input volume. */
  MicrophoneVolumeUp = 'MicrophoneVolumeUp',

  /** Switches into TV viewing mode. */
  TV = 'TV',

  /** Toggles 3D TV mode on and off. */
  TV3DMode = 'TV3DMode',

  /** Toggles between antenna and cable inputs. */
  TVAntennaCable = 'TVAntennaCable',

  /** Toggles audio description mode on and off. */
  TVAudioDescription = 'TVAudioDescription',

  /**
   * Decreases the audio description's mixing volume; reduces the volume of
   * the audio descriptions relative to the program sound.
   */
  TVAudioDescriptionMixDown = 'TVAudioDescriptionMixDown',

  /**
   * Increases the audio description's mixing volume; increases the volume of
   * the audio descriptions relative to the program sound.
   */
  TVAudioDescriptionMixUp = 'TVAudioDescriptionMixUp',

  /**
   * Displays or hides the media contents available for playback (this may be
   * a channel guide showing the currently airing programs, or a list of
   * media files to play).
   */
  TVContentsMenu = 'TVContentsMenu',

  /** Displays or hides the TV's data service menu. */
  TVDataService = 'TVDataService',

  /** Cycles the input mode on an external TV. */
  TVInput = 'TVInput',

  /** Switches to the input "Component 1." */
  TVInputComponent1 = 'TVInputComponent1',

  /** Switches to the input "Component 2." */
  TVInputComponent2 = 'TVInputComponent2',

  /** Switches to the input "Composite 1." */
  TVInputComposite1 = 'TVInputComposite1',

  /** Switches to the input "Composite 2." */
  TVInputComposite2 = 'TVInputComposite2',

  /** Switches to the input "HDMI 1." */
  TVInputHDMI1 = 'TVInputHDMI1',

  /** Switches to the input "HDMI 2." */
  TVInputHDMI2 = 'TVInputHDMI2',

  /** Switches to the input "HDMI 3." */
  TVInputHDMI3 = 'TVInputHDMI3',

  /** Switches to the input "HDMI 4." */
  TVInputHDMI4 = 'TVInputHDMI4',

  /** Switches to the input "VGA 1." */
  TVInputVGA1 = 'TVInputVGA1',

  /** The Media Context menu key. */
  TVMediaContext = 'TVMediaContext',

  /** Toggle the TV's network connection on and off. */
  TVNetwork = 'TVNetwork',

  /** Put the TV into number entry mode. */
  TVNumberEntry = 'TVNumberEntry',

  /** The device's power button. */
  TVPower = 'TVPower',

  /** Radio button. */
  TVRadioService = 'TVRadioService',

  /** Satellite button. */
  TVSatellite = 'TVSatellite',

  /** Broadcast Satellite button. */
  TVSatelliteBS = 'TVSatelliteBS',

  /** Communication Satellite button. */
  TVSatelliteCS = 'TVSatelliteCS',

  /** Toggles among available satellites. */
  TVSatelliteToggle = 'TVSatelliteToggle',

  /**
   * Selects analog terrestrial television service (analog cable or antenna
   * reception).
   */
  TVTerrestrialAnalog = 'TVTerrestrialAnalog',

  /**
   * Selects digital terrestrial television service (digital cable or antenna
   * reception).
   */
  TVTerrestrialDigital = 'TVTerrestrialDigital',

  /** Timer programming button. */
  TVTimer = 'TVTimer',

  /** Changes the input mode on an external audio/video receiver (AVR) unit. */
  AVRInput = 'AVRInput',

  /** Toggles the power on an external AVR unit. */
  AVRPower = 'AVRPower',

  /**
   * General-purpose media function key, color-coded red. This has index
   * 0 among the colored keys.
   */
  ColorF0Red = 'ColorF0Red',

  /**
   * General-purpose media function key, color-coded green. This has index
   * 1 among the colored keys.
   */
  ColorF1Green = 'ColorF1Green',

  /**
   * General-purpose media function key, color-coded yellow. This has index
   * 2 among the colored keys.
   */
  ColorF2Yellow = 'ColorF2Yellow',

  /**
   * General-purpose media function key, color-coded blue. This has index
   * 3 among the colored keys.
   */
  ColorF3Blue = 'ColorF3Blue',

  /**
   * General-purpose media function key, color-coded grey. This has index
   * 4 among the colored keys.
   */
  ColorF4Grey = 'ColorF4Grey',

  /**
   * General-purpose media function key, color-coded brown. This has index
   * 5 among the colored keys.
   */
  ColorF5Brown = 'ColorF5Brown',

  /** Toggles closed captioning on and off. */
  ClosedCaptionToggle = 'ClosedCaptionToggle',

  /**
   * Adjusts the brightness of the device by toggling between two brightness
   * levels or by cycling among multiple brightness levels.
   */
  Dimmer = 'Dimmer',

  /** Cycles among video sources. */
  DisplaySwap = 'DisplaySwap',

  /** Switches the input source to the Digital Video Recorder (DVR). */
  DVR = 'DVR',

  /** The Exit button, which exits the current application or menu. */
  Exit = 'Exit',

  /** Clears the program or content stored in the first favorites list slot. */
  FavoriteClear0 = 'FavoriteClear0',

  /** Clears the program or content stored in the second favorites list slot. */
  FavoriteClear1 = 'FavoriteClear1',

  /** Clears the program or content stored in the third favorites list slot. */
  FavoriteClear2 = 'FavoriteClear2',

  /** Clears the program or content stored in the fourth favorites list slot. */
  FavoriteClear3 = 'FavoriteClear3',

  /**
   * Selects (recalls) the program or content stored in the first favorites
   * list slot.
   */
  FavoriteRecall0 = 'FavoriteRecall0',

  /**
   * Selects (recalls) the program or content stored in the second favorites
   * list slot.
   */
  FavoriteRecall1 = 'FavoriteRecall1',

  /**
   * Selects (recalls) the program or content stored in the third favorites
   * list slot.
   */
  FavoriteRecall2 = 'FavoriteRecall2',

  /**
   * Selects (recalls) the program or content stored in the fourth favorites
   * list slot.
   */
  FavoriteRecall3 = 'FavoriteRecall3',

  /**
   * Stores the current program or content into the first favorites list
   * slot.
   */
  FavoriteStore0 = 'FavoriteStore0',

  /**
   * Stores the current program or content into the second favorites list
   * slot.
   */
  FavoriteStore1 = 'FavoriteStore1',

  /**
   * Stores the current program or content into the third favorites list
   * slot.
   */
  FavoriteStore2 = 'FavoriteStore2',

  /**
   * Stores the current program or content into the fourth favorites list
   * slot.
   */
  FavoriteStore3 = 'FavoriteStore3',

  /** Toggles the display of the program or content guide. */
  Guide = 'Guide',

  /**
   * If the guide is currently displayed, this button tells the guide to
   * display the next day's content.
   */
  GuideNextDay = 'GuideNextDay',

  /**
   * If the guide is currently displayed, this button tells the guide to
   * display the previous day's content.
   */
  GuidePreviousDay = 'GuidePreviousDay',

  /**
   * Toggles the display of information about the currently selected content,
   * program, or media.
   */
  Info = 'Info',

  /**
   * Tells the device to perform an instant replay (typically some form of
   * jumping back a short amount of time then playing it again, possibly but
   * not usually in slow motion).
   */
  InstantReplay = 'InstantReplay',

  /** Opens content linked to the current program, if available and possible. */
  Link = 'Link',

  /** Lists the current program. */
  ListProgram = 'ListProgram',

  /** Toggles a display listing currently available live content or programs. */
  LiveContent = 'LiveContent',

  /** Locks or unlocks the currently selected content or pgoram. */
  Lock = 'Lock',

  /**
   * Presents a list of media applications, such as photo viewers, audio and
   * video players, and games. [1]
   */
  MediaApps = 'MediaApps',

  /** The Audio Track key. */
  MediaAudioTrack = 'MediaAudioTrack',

  /** Jumps back to the last-viewed content, program, or other media. */
  MediaLast = 'MediaLast',

  /** Skips backward to the previous content or program. */
  MediaSkipBackward = 'MediaSkipBackward',

  /** Skips forward to the next content or program. */
  MediaSkipForward = 'MediaSkipForward',

  /** Steps backward to the previous content or program. */
  MediaStepBackward = 'MediaStepBackward',

  /** Steps forward to the next content or program. */
  MediaStepForward = 'MediaStepForward',

  /**
   * Top Menu button. Opens the media's main menu (e.g., for a DVD or Blu-Ray
   * disc).
   */
  MediaTopMenu = 'MediaTopMenu',

  /** Navigates into a submenu or option. */
  NavigateIn = 'NavigateIn',

  /** Navigates to the next item. */
  NavigateNext = 'NavigateNext',

  /** Navigates out of the current screen or menu. */
  NavigateOut = 'NavigateOut',

  /** Navigates to the previous item. */
  NavigatePrevious = 'NavigatePrevious',

  /** Cycles to the next channel in the favorites list. */
  NextFavoriteChannel = 'NextFavoriteChannel',

  /**
   * Cycles to the next saved user profile, if this feature is supported and
   * multiple profiles exist.
   */
  NextUserProfile = 'NextUserProfile',

  /**
   * Opens the user interface for selecting on demand content or programs to
   * watch.
   */
  OnDemand = 'OnDemand',

  /** Starts the process of pairing the remote with a device to be controlled. */
  Pairing = 'Pairing',

  /** A button to move the picture-in-picture view downward. */
  PinPDown = 'PinPDown',

  /** A button to control moving the picture-in-picture view. */
  PinPMove = 'PinPMove',

  /** Toggles display of the picture-in-picture view on and off. */
  PinPToggle = 'PinPToggle',

  /** A button to move the picture-in-picture view upward. */
  PinPUp = 'PinPUp',

  /** Decreases the media playback rate. */
  PlaySpeedDown = 'PlaySpeedDown',

  /** Returns the media playback rate to normal. */
  PlaySpeedReset = 'PlaySpeedReset',

  /** Increases the media playback rate. */
  PlaySpeedUp = 'PlaySpeedUp',

  /** Toggles random media (also known as "shuffle mode") on and off. */
  RandomToggle = 'RandomToggle',

  /**
   * A code sent when the remote control's battery is low. This doesn't
   * actually correspond to a physical key at all.
   */
  RcLowBattery = 'RcLowBattery',

  /** Cycles among the available media recording speeds. */
  RecordSpeedNext = 'RecordSpeedNext',

  /**
   * Toggles radio frequency (RF) input bypass mode on and off. RF bypass
   * mode passes RF input directly to the RF output without any processing or
   * filtering.
   */
  RfBypass = 'RfBypass',

  /**
   * Toggles the channel scan mode on and off. This is a mode which flips
   * through channels automatically until the user stops the scan.
   */
  ScanChannelsToggle = 'ScanChannelsToggle',

  /** Cycles through the available screen display modes. */
  ScreenModeNext = 'ScreenModeNext',

  /** Toggles display of the device's settings screen on and off. */
  Settings = 'Settings',

  /** Toggles split screen display mode on and off. */
  SplitScreenToggle = 'SplitScreenToggle',

  /** Cycles among input modes on an external set-top box (STB). */
  STBInput = 'STBInput',

  /** Toggles on and off an external STB. */
  STBPower = 'STBPower',

  /** Toggles the display of subtitles on and off if they're available. */
  Subtitle = 'Subtitle',

  /**
   * Toggles display of teletext,
   * if available.
   */
  Teletext = 'Teletext',

  /** Cycles through the available video modes. */
  VideoModeNext = 'VideoModeNext',

  /**
   * Causes the device to identify itself in some fashion, such as by
   * flashing a light, briefly changing the brightness of indicator lights,
   * or emitting a tone.
   */
  Wink = 'Wink',

  /**
   * Toggles between fullscreen and scaled content display, or otherwise
   * change the magnification level.
   */
  ZoomToggle = 'ZoomToggle',

  /**
   * Presents a list of possible corrections for a word which was incorrectly
   * identified.
   */
  SpeechCorrectionList = 'SpeechCorrectionList',

  /**
   * Toggles between dictation mode and command/control mode. This lets the
   * speech engine know whether to interpret spoken words as input text or as
   * commands.
   */
  SpeechInputToggle = 'SpeechInputToggle',

  /** Closes the current document or message. Must not exit the application. */
  Close = 'Close',

  /** Creates a new document or message. */
  New = 'New',

  /** Opens an existing document or message. */
  Open = 'Open',

  /** Prints the current document or message. */
  Print = 'Print',

  /** Saves the current document or message. */
  Save = 'Save',

  /** Starts spell checking the current document. */
  SpellCheck = 'SpellCheck',

  /** Opens the user interface to forward a message. */
  MailForward = 'MailForward',

  /** Opens the user interface to reply to a message. */
  MailReply = 'MailReply',

  /** Sends the current message. */
  MailSend = 'MailSend',

  /**
   * The Calculator key, often labeled with an icon. This is often
   * used as a generic application launcher key
   * (APPCOMMAND_LAUNCH_APP2).
   */
  LaunchCalculator = 'LaunchCalculator',

  /** The Calendar key. Often labeled with an icon. */
  LaunchCalendar = 'LaunchCalendar',

  /** The Contacts key. */
  LaunchContacts = 'LaunchContacts',

  /** The Mail key. Often labeled with an icon. */
  LaunchMail = 'LaunchMail',

  /** The Media Player key. */
  LaunchMediaPlayer = 'LaunchMediaPlayer',

  /** The Music Player key. Often labeled with an icon. */
  LaunchMusicPlayer = 'LaunchMusicPlayer',

  /**
   * The My Computer key on Windows keyboards. This is often used
   * as a generic application launcher key
   * (APPCOMMAND_LAUNCH_APP1).
   */
  LaunchMyComputer = 'LaunchMyComputer',

  /**
   * The Phone key. Opens the phone dialer application (if one is
   * present).
   */
  LaunchPhone = 'LaunchPhone',

  /** The Screen Saver key. */
  LaunchScreenSaver = 'LaunchScreenSaver',

  /** The Spreadsheet key. This key may be labeled with an icon. */
  LaunchSpreadsheet = 'LaunchSpreadsheet',

  /**
   * The Web Browser key. This key is frequently labeled with an
   * icon.
   */
  LaunchWebBrowser = 'LaunchWebBrowser',

  /** The WebCam key. Opens the webcam application. */
  LaunchWebCam = 'LaunchWebCam',

  /**
   * The Word Processor key. This may be an icon of a specific
   * word processor application, or a generic document icon.
   */
  LaunchWordProcessor = 'LaunchWordProcessor',

  /** The first generic application launcher button. */
  LaunchApplication1 = 'LaunchApplication1',

  /** The second generic application launcher button. */
  LaunchApplication2 = 'LaunchApplication2',

  /** The third generic application launcher button. */
  LaunchApplication3 = 'LaunchApplication3',

  /** The fourth generic application launcher button. */
  LaunchApplication4 = 'LaunchApplication4',

  /** The fifth generic application launcher button. */
  LaunchApplication5 = 'LaunchApplication5',

  /** The sixth generic application launcher button. */
  LaunchApplication6 = 'LaunchApplication6',

  /** The seventh generic application launcher button. */
  LaunchApplication7 = 'LaunchApplication7',

  /** The eighth generic application launcher button. */
  LaunchApplication8 = 'LaunchApplication8',

  /** The ninth generic application launcher button. */
  LaunchApplication9 = 'LaunchApplication9',

  /** The 10th generic application launcher button. */
  LaunchApplication10 = 'LaunchApplication10',

  /** The 11th generic application launcher button. */
  LaunchApplication11 = 'LaunchApplication11',

  /** The 12th generic application launcher button. */
  LaunchApplication12 = 'LaunchApplication12',

  /** The 13th generic application launcher button. */
  LaunchApplication13 = 'LaunchApplication13',

  /** The 14th generic application launcher button. */
  LaunchApplication14 = 'LaunchApplication14',

  /** The 15th generic application launcher button. */
  LaunchApplication15 = 'LaunchApplication15',

  /** The 16th generic application launcher button. */
  LaunchApplication16 = 'LaunchApplication16',

  /**
   * Navigates to the previous content or page in the current Web view's
   * history.
   */
  BrowserBack = 'BrowserBack',

  /** Opens the user's list of bookmarks/favorites. */
  BrowserFavorites = 'BrowserFavorites',

  /** Navigates to the next content or page in the current Web view's history. */
  BrowserForward = 'BrowserForward',

  /** Navigates to the user's preferred home page. */
  BrowserHome = 'BrowserHome',

  /** Refreshes the current page or content. */
  BrowserRefresh = 'BrowserRefresh',

  /**
   * Activates the user's preferred search engine or the search interface
   * within their browser.
   */
  BrowserSearch = 'BrowserSearch',

  /** Stops loading the currently displayed Web view or content. */
  BrowserStop = 'BrowserStop',

  /**
   * The decimal point key (typically . or
   * , depending on the region).
   * In newer browsers, this value to be the character generated by the
   * decimal key (one of those two characters). [1]
   */
  Decimal = 'Decimal',

  /** The 11 key found on certain media numeric keypads. */
  Key11 = 'Key11',

  /** The 12 key found on certain media numeric keypads. */
  Key12 = 'Key12',

  /** The numeric keypad's multiplication key, *. */
  Multiply = 'Multiply',

  /** The numeric keypad's addition key, +. */
  Add = 'Add',

  /** The numeric keypad's division key, /. */
  Divide = 'Divide',

  /** The numeric keypad's subtraction key, -. */
  Subtract = 'Subtract',

  /**
   * The numeric keypad's places separator character.
   * (In the United States this is a comma, but elsewhere it is frequently
   * a period.)
   */
  Separator = 'Separator',
}