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rock-paper-scissors.js
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rock-paper-scissors.js
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// @ts-nocheck
/* eslint-disable no-use-before-define */
/* eslint-disable func-style */
// ! Note: Logical operators have a lower priority than comparison operators and math operators.
let score = JSON.parse(localStorage.getItem("score")) ?? {
wins: 0,
losses: 0,
ties: 0,
};
const updateScoreElement = () => {
document.querySelector(
"p.js-score",
).innerHTML = `Wins: ${score.wins}, Losses: ${score.losses}, Ties: ${score.ties}`;
};
updateScoreElement();
/**
* @returns {"rock" | "paper" | "scissors"}
*/
const pickComputerMove = () => {
const randomNumber = Math.random();
return randomNumber < 1 / 3
? "rock"
: randomNumber < 2 / 3
? "paper"
: "scissors";
};
/**
* @param {"rock" | "paper" | "scissors"} playerMove
* @returns {void}
*/
const playGame = (playerMove) => {
const computerMove = pickComputerMove();
const result =
computerMove === playerMove
? "Tie"
: (computerMove === "rock" && playerMove === "scissors") ||
(computerMove === "paper" && playerMove === "rock") ||
(computerMove === "scissors" && playerMove === "paper")
? "You lose"
: "You win";
result === "You win"
? score.wins++
: result === "You lose"
? score.losses++
: score.ties++;
localStorage.setItem("score", JSON.stringify(score));
updateScoreElement();
document.querySelector("p.js-result").innerHTML = `${result}.`;
document.querySelector("p.you-computer").innerHTML =
"You · Computer";
document.querySelector("p.js-moves-chosen").innerHTML = `
<div class="result-image-container">
<img alt="${playerMove[0].toUpperCase}${playerMove.slice(
1,
)} Emoji" src="images/${playerMove}-emoji.png" class="move-icon" />
<img alt="${computerMove[0].toUpperCase}${computerMove.slice(
1,
)} Emoji" src="images/${computerMove}-emoji.png" class="move-icon" />
</div>
`;
};
let intervalID;
const resetScore = () => {
score = {wins: 0, losses: 0, ties: 0};
updateScoreElement();
localStorage.removeItem("score");
};
// Better than onclick attribute.
const rockButton = document.querySelector("button.js-rock-button");
rockButton.addEventListener("click", () => playGame("rock"));
const paperButton = document.querySelector("button.js-paper-button");
paperButton.addEventListener("click", () => playGame("paper"));
const scissorsButton = document.querySelector("button.js-scissors-button");
scissorsButton.addEventListener("click", () => playGame("scissors"));
const confirmationContainerDiv = document.querySelector(
"div.js-confirmation-container",
);
const resetConfirmation = () => {
confirmationContainerDiv.innerHTML = "";
};
const resetScoreConfirmationPopup = () => {
confirmationContainerDiv.innerHTML = `
<p class="reset-score-confirmation-message">
Are you sure you want to reset the score?
</p>
<button class="yes-button js-yes-button">Yes (Y)</button>
<button class="no-button js-no-button">No (N)</button>
`;
const yesButton = document.querySelector("button.js-yes-button");
const noButton = document.querySelector("button.js-no-button");
yesButton.addEventListener("click", () => {
resetScore();
resetConfirmation();
});
noButton.addEventListener("click", () => {
resetConfirmation();
});
};
const resetScoreButton = document.querySelector("button.js-reset-score-button");
resetScoreButton.addEventListener("click", resetScoreConfirmationPopup);
const autoPlayButton = document.querySelector("button.js-auto-play-button");
autoPlayButton.addEventListener("click", autoPlay);
document.addEventListener("keydown", (event) => {
switch (event.key) {
case "r":
playGame("rock");
break;
case "p":
playGame("paper");
break;
case "s":
playGame("scissors");
break;
case "a":
autoPlay();
break;
case "Backspace":
resetScoreConfirmationPopup();
break;
case "y":
document.querySelector("button.js-yes-button") &&
(resetScore() || resetConfirmation());
break;
case "n":
document.querySelector("button.js-no-button") && resetConfirmation();
break;
}
});
// Personal preference if arrow function or not.
function autoPlay() {
if (autoPlayButton.innerHTML.trim() === "Auto Play (A)") {
autoPlayButton.innerHTML = "Stop Auto Play (A)";
intervalID = setInterval(() => playGame(pickComputerMove()), 1000);
} else {
// Stops a setInterval function.
clearInterval(intervalID);
autoPlayButton.innerHTML = "Auto Play (A)";
}
}