src/utils/Keyboard.ts

   1 /**
   2  * xterm.js: xterm, in the browser
   3  * Copyright (c) 2016, SourceLair Private Company <www.sourcelair.com> (MIT License)
   4  */
   5
   6 /**
   7  * Keyboard utilities module. This module contains utilities for dealing with keyboard interaction.
   8  * @module xterm/utils/Keyboard
   9  */
  10
  11 /**
  12  * Gets whether a KeyboardEvent is made up entirely of modifier keys.
  13  *
  14  * @param event The event to check.
  15  * @return Whether the KeyboardEvent is made up entirely of modifier keys.
  16  */
  17 export function isModifierOnlyKeyboardEvent(event: KeyboardEvent): boolean {
  18   return event.keyCode === 16 || // Shift
  19       event.keyCode === 17 || // Control
  20       event.keyCode === 18 || // Alt
  21       event.keyCode === 91; // Meta
  22 }