KeyboardEvent constructor

KeyboardEvent(String type, { Window view, bool canBubble: true, bool cancelable: true, int location, int keyLocation, bool ctrlKey: false, bool altKey: false, bool shiftKey: false, bool metaKey: false })

Programmatically create a KeyboardEvent.

Due to browser differences, keyCode, charCode, or keyIdentifier values cannot be specified in this base level constructor. This constructor enables the user to programmatically create and dispatch a KeyboardEvent, but it will not contain any particular key content. For programmatically creating keyboard events with specific key value contents, see the custom Event KeyEvent.

Implementation 

factory KeyboardEvent(String type,
    {Window view,
    bool canBubble: true,
    bool cancelable: true,
    int location,
    int keyLocation, // Legacy alias for location
    bool ctrlKey: false,
    bool altKey: false,
    bool shiftKey: false,
    bool metaKey: false}) {
  if (view == null) {
    view = window;
  }
  location ??= keyLocation ?? 1;
  KeyboardEvent e = document._createEvent("KeyboardEvent");
  e._initKeyboardEvent(type, canBubble, cancelable, view, "", location,
      ctrlKey, altKey, shiftKey, metaKey);
  return e;
}