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08-rock-paper-scissors.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Rock Paper Scissors</title>
</head>
<body>
<p>Rock Paper Scissors</p>
<button onclick="
playGame('rock');
">Rock</button>
<button onclick="
playGame('paper');
">Paper</button>
<button onclick="
playGame('scissors');
">Scissors</button>
<button onclick="
score.wins = 0;
score.losses = 0;
score.ties = 0;
localStorage.removeItem('score')
">Reset Score</button>
<!-- we dont use var because it doesnt
really follow the rules of scope(inside of condition statements)-->
<script>
let score = JSON.parse(localStorage.getItem('score')) || {
wins: 0,
losses: 0,
ties: 0
};
/* if (!score) {
score = {
wins: 0,
losses: 0,
ties: 0
};
}
*/
function playGame(playerMove) {
const computerMove = pickComputerMove();
let result = '';
if (playerMove==='scissors') {
if (computerMove === 'rock') {
result = 'You lost.'
}
else if (computerMove === 'paper'){
result = 'You win.'
}
else if (computerMove === 'scissors') {
result = 'Tie.'
}
} else if (playerMove==='paper') {
if (computerMove === 'rock') {
result = 'You win.'
}
else if (computerMove === 'paper'){
result = 'Tie.'
}
else if (computerMove === 'scissors') {
result = 'You lost.'
}
} else if (playerMove==='rock') {
if (computerMove === 'rock') {
result = 'Tie.'
}
else if (computerMove === 'paper'){
result = 'You lost.'
}
else if (computerMove === 'scissors') {
result = 'You win.'
}
}
if (result==='You win.') {
score.wins += 1;
} else if (result === 'You lost.') {
score.losses += 1;
} else if (result === 'Tie.') {
score.ties += 1;
}
localStorage.setItem('score', JSON.stringify(score));
alert(`You picked ${playerMove}. Computer picked ${computerMove}. ${result}
Wins: ${score.wins}, Losses: ${score.losses}, Ties: ${score.ties}`)
}
function pickComputerMove() {
const randomNumber = Math.random();
let computerMove = '';
let result = ''
if (randomNumber >= 0 && randomNumber < 1/3) {
computerMove = 'rock'
}
else if (randomNumber >= 1/3 && randomNumber < 2/3) {
computerMove = 'paper'
}
else if (randomNumber >= 2/3 && randomNumber < 1){
computerMove = 'scissors'
}
return computerMove;
}
</script>
</body>
</html>