scrabble-solver/packages/scrabble-solver/src/api/isCharacterValid.ts

Scrabble Solver 2 - Free, open-source, cross-platform, multi-language analysis tool for Scrabble, Scrabble Duel, Super Scrabble, Letter League, Crossplay, Literaki, and Kelimelik. Quickly find the top-scoring words using the given board and tiles.

const TWO_TILE_CHARACTER_LENGTH = 2;

const MAX_CHARACTER_LENGTH = TWO_TILE_CHARACTER_LENGTH;

export const isCharacterValid = (character: string): boolean => {
  /*
   * We could be strict here and check whether config.hasCharacter(character) || character === BLANK
   * but since this case won't really affect/break solving, we don't need to worry about it.
   * It's better to display an empty state than error state in UI, so this is a sanity check only.
   */
  return character.length !== 0 && character.length <= MAX_CHARACTER_LENGTH;
};