Function getNextLevel

src/levels/index.ts:49–55

(currentLevel: LevelType)

 * @param currentLevel
 */
export const getNextLevel = (currentLevel: LevelType) => {
  const num = getCurrentLevelNum(currentLevel);
  if (num >= allLevels.length - 1) {
    return;
  }
  return allLevels[num + 1];
};