Deno implementation of Wordle for cmd

wordle.ts

// Deno version of Wordle
// Loosely inspired by https://gist.github.com/huytd/6a1a6a7b34a0d0abcac00b47e3d01513
//
// Run this script: deno run --allow-read wordle.ts
// Install this script: deno install --name=wordle --allow-read https://gist.githubusercontent.com/ivebencrazy/ac3c700f7d7800113c0d5d5251b0bdd8/raw/3cbf169aa7b5e59f6da033b53775085fe5d863ee/wordle.ts

import {
  bgGreen,
  bgWhite,
  bgYellow,
  black,
} from "https://deno.land/[email protected]/fmt/colors.ts";

const maxGuess = 6;
const words = (new TextDecoder("utf-8"))
  .decode(await Deno.readFile("/usr/share/dict/words"))
  .split("\n")
  .filter((word) => word.length === 5)
  .map((word) => word.toUpperCase());
const answer = words[Math.floor(Math.random() * words.length)];
let end = false;
let guessCount = 0;

while (end !== true) {
  guessCount++;

  if (guessCount > maxGuess) {
    console.log(`You Lose! The word is ${answer}`);
    end = true;
  } else {
    const promptQuestion = `Enter your guess (${guessCount} / 6):`;
    const userAnswer = (prompt(promptQuestion) || "").toUpperCase();

    if (words.find((word) => word === userAnswer) == null) {
      console.log(`${userAnswer} is not a valid word! Guess again!`);
      guessCount--;
    } else {
      if (userAnswer === answer) {
        console.log(`You Win!`);
        end = true;
      }
      let output = "";
      answer.split("").forEach((answerLetter, index) => {
        const userAnswerLetter = userAnswer[index];
        if (answerLetter === userAnswerLetter) {
          output += bgGreen(` ${userAnswerLetter} `);
        } else if (answer.indexOf(userAnswerLetter) !== -1) {
          output += bgYellow(` ${userAnswerLetter} `);
        } else {
          output += bgWhite(` ${userAnswerLetter} `);
        }
      });
      console.log(black(output));
    }
  }
}