KeyboardEvent constructor Null safety

  1. String type,
  2. {Window? view,
  3. bool canBubble = true,
  4. bool cancelable = true,
  5. int? location,
  6. int? keyLocation,
  7. bool ctrlKey = false,
  8. bool altKey = false,
  9. bool shiftKey = false,
  10. 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.


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") as KeyboardEvent;
  e._initKeyboardEvent(type, canBubble, cancelable, view, "", location,
      ctrlKey, altKey, shiftKey, metaKey);
  return e;