scrabble-solver/packages/scrabble-solver/src/lib/extractInputValue.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.

export const extractInputValue = (input: HTMLInputElement) => {
  const value = input.value.toLocaleLowerCase();

  if (input.selectionStart === null || input.selectionEnd === null) {
    return value;
  }

  const index = Math.min(input.selectionStart, input.selectionEnd);

  if (index > 0) {
    return value.substring(index - 1, index);
  }

  return value;
};