excalidraw/src/keys.ts

export const KEYS = {
  ARROW_LEFT: "ArrowLeft",
  ARROW_RIGHT: "ArrowRight",
  ARROW_DOWN: "ArrowDown",
  ARROW_UP: "ArrowUp",
  ENTER: "Enter",
  ESCAPE: "Escape",
  DELETE: "Delete",
  BACKSPACE: "Backspace",
  get META() {
    return /Mac|iPod|iPhone|iPad/.test(window.navigator.platform)
      ? "metaKey"
      : "ctrlKey";
  }
};

export function isArrowKey(keyCode: string) {
  return (
    keyCode === KEYS.ARROW_LEFT ||
    keyCode === KEYS.ARROW_RIGHT ||
    keyCode === KEYS.ARROW_DOWN ||
    keyCode === KEYS.ARROW_UP
  );
}