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HTML 

              
                <!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8>" />
    <title>Rock Papaer Scissors</title>
    <link rel="stylesheet" href="./styles.css" type="text/css" />
  </head>
  <body>
    <header><h1>Rock Paper Scissors</h1></header>

    <div class="score-board">
      <div id="user-label" class="badge">user</div>
      <div id="computer-label" class="badge">comp</div>
      <span id="user-score">0</span> : <span id="computer-score">0</span>
    </div>

    <div class="result"><p>Paper covers rock. You win!</p></div>

    <div class="choices">
      <div id="rock" class="choice">
        <img
          width="48"
          height="48"
          src="data:image/png;base64,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"
        />
      </div>
      <div id="paper" class="choice">
        <img
          width="48"
          height="48"
          src="data:image/png;base64,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"
        />
      </div>
      <div id="scissors" class="choice">
        <img
          width="48"
          height="48"
          src="data:image/png;base64,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"
        />
      </div>

      <p id="action-message">Make your move.</p>
			<p><code>Tutorial from: <a href="https://www.youtube.com/watch?v=jaVNP3nIAv0" title="Web Development Tutorial - JavaScript, HTML, CSS - Rock Paper Scissors Game" >https://www.youtube.com/watch?v=jaVNP3nIAv0</a></code></p>
    </div>
    <script src="./app.js" type="text/javascript"></script>
  </body>
</html>
!

CSS 

              
                @import url("https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700");
@import url('https://fonts.googleapis.com/css?family=Source+Code+Pro:300,500');
html {
	box-sizing: border-box;
}

*,
*:before,
*:after {
	box-sizing: inherit;
}

* {
	margin: 0;
	padding: 0;
}

body {
	background: #24272e;
	color: #fff;
	font-family: "Roboto", sans-serif;
}

code {
	font-family: 'Source Code Pro', monospace;
	font-size: 12px;
}

a {
	font-family: 'Source Code Pro', monospace;
	color: #ffcc99;
}

a:hover {
	color: #ffba76;
}

header {
	background: #fff;
	padding: 20px;
}

header h1 {
	color: #444;
	text-align: center;
	font-weight: 100;
}

.score-board {
	border: 3px solid #fff;
	width: 300px;
	margin: 40px auto;
	font-size: 40px;
	border-radius: 4px;
	text-align: center;
	padding: 15px 20px;
	position: relative;
}

.badge {
	background: #e2584d;
	text-transform: uppercase;
	font-size: 14px;
	padding: 10px 6px;
}

#user-label {
	position: absolute;
	top: 50%;
	left: -5%;
	transform: translate(-10%, -50%);
}

#computer-label {
	position: absolute;
	top: 50%;
	right: -5%;
	transform: translate(10%, -50%);
}

.result {
	font-weight: 300;
	text-align: center;
	font-size: 32px;
	line-height: 40px;
}

.result {
	line-height: 50px;
}

.choices {
	margin: 0 auto;
	text-align: center;
	padding: 40px 0;
}

.choice {
	display: inline-block;
	border: 3px solid #fff;
	border-radius: 50%;
	padding: 10px;
	margin: auto 10px;
	transition: all 0.3s ease;
}

.choice img {
	filter: invert(100%);
}

#action-message {
	text-align: center;
	font-weight: 500;
	text-transform: uppercase;
	letter-spacing: 2px;
	margin: 40px 0;
}

.winningStyles {
	border: 3px solid #4dcc7d;
	background-color: #043507;
	box-shadow: 0 0 20px #043507;
}

.losingStyles {
	border: 3px solid #c52e2e;
	background-color: #2e0303;
	box-shadow: 0 0 20px #2e0303;
}

.drawStyles {
	border: 3px solid #444;
	background-color: #222;
	box-shadow: 0 0 20px #222;
}

sup {
	margin: 0;
	padding: 0;
}
!

JS 

              
                // cache the dom (storing for future use)
// & reset everything to 0 value
let userScore = 0;
let computerScore = 0;
const userScore_span = document.getElementById('user-score');
const computerScore_span = document.getElementById('computer-score');
const scoreBoard_div = document.querySelector('.score-board');
const result_div = document.querySelector('.result');
const rock_div = document.getElementById('rock');
const paper_div = document.getElementById('paper');
const scissors_div = document.getElementById('scissors');


// set up the core function for the computer that will use math.random to loop through an array and return that value
function getComputerChoice() {
  const choices = ['rock', 'paper', 'scissors'];
  const randomNumber = Math.floor(Math.random() * 3);
  return choices[randomNumber];
}

// similar to convertcase but just takes lowercase and replaces with titlecase
function convertCase(anythingIwant) {
  if (anythingIwant === 'paper') return 'Paper';
  if (anythingIwant === 'scissors') return 'Scissors';
  return 'Rock';
}

// Winning Condition - this handles what happens when the user clicks one of the choices where the value is them passed through as a parameter
function win(user, computer) {
  userScore++;
  // console.log('user score is ' + userScore + ' ' + user);
  userScore_span.innerHTML = userScore;
  const userName = ' (user)'.fontsize(3).sup();
  const compName = ' (comp)'.fontsize(3).sup();
  result_div.innerHTML = `<p>${convertCase(user)}${userName} beats ${convertCase(computer)}${compName}. You win!</p>`;
  const roundStatus = document.getElementById(user);
  roundStatus.classList.add('winningStyles');
  setTimeout(() => roundStatus.classList.remove('winningStyles'), 300);
}

// Losing Condition - this handles what happens when the user clicks one of the choices where the value is them passed through as a parameter
function loses(user, computer) {
  computerScore++;
  // console.log('computer score is ' + computerScore + ' ' + computer);
  computerScore_span.innerHTML = computerScore;
  const userName = ' (user)'.fontsize(3).sup();
  const compName = ' (comp)'.fontsize(3).sup();
  result_div.innerHTML = `<p>${convertCase(computer)}${compName} beats ${convertCase(user)}${userName}. You lose!</p>`;
  const roundStatus = document.getElementById(user);
  roundStatus.classList.add('losingStyles');
  setTimeout(() => roundStatus.classList.remove('losingStyles'), 300);
}

// Draw Condition - this handles what happens when the user clicks one of the choices where the value is them passed through as a parameter
function draw(user, computer) {
	const userName = ' (user)'.fontsize(3).sup();
  const compName = ' (comp)'.fontsize(3).sup();
  result_div.innerHTML = `<p>It was a draw! You both chose ${convertCase(user)}</p>`;
  // "It was a draw! You both chose " + user + " " + computer; // old js
  const roundStatus = document.getElementById(user);
  roundStatus.classList.add('drawStyles');
  setTimeout(() => roundStatus.classList.remove('drawStyles'), 300);
}

// The core game functions that set up and determine the games actual logic aka paper beats rock etc
function game(userChoice) {
  const computerChoice = getComputerChoice();
  // console.log('Game function: user choice is = ' + userChoice);
  // console.log('Game function: computer choice is = ' + computerChoice);

  switch (userChoice + computerChoice) {
    case 'paperrock':
    case 'rockscissors':
    case 'scissorspaper':
      win(userChoice, computerChoice);
      // console.log("user wins");
      break;
    case 'rockpaper':
    case 'scissorsrock':
    case 'paperscissors':
      loses(userChoice, computerChoice);
      // console.log("computer wins");
      break;
    case 'rockrock':
    case 'scissorsscissors':
    case 'paperpaper':
      draw(userChoice, computerChoice);
      // console.log("draw");
      break;
  }
}
// ES5 style of writing this function
// function main() {
//   rock_div.addEventListener('click', function() {
//     game('rock');
//   });

//   paper_div.addEventListener('click', function() {
//     game('paper');
//   });

//   scissors_div.addEventListener('click', function() {
//     game('scissors');
//   });
// }

// ES6 style of writing this function
// This function creates and adds an eventlistener to the rock, paper scissors html element and the passes the value of that element to the game function
function main() {
  rock_div.addEventListener('click', () => game('rock'));
  paper_div.addEventListener('click', () => game('paper'));
  scissors_div.addEventListener('click', () => game('scissors'));
}

main();
!
999px

Console