code-boxx/0-JS-RPS.MD

## 0-JS-RPS.MD

      
    Raw
  

              0-JS-RPS.MD
            
          
    JAVASCRIPT ROCK PAPER SCISSORS

https://code-boxx.com/javascript-rock-paper-scissors-game/
IMAGES


LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## rps.css
/* (A) GAME WRAPPER + LAYOUT */
#rps-game * {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
#rps-game, #rps-play {
  display: flex;
  flex-wrap: wrap;
}
#rps-game { max-width: 600px; }

/* (B) MOVES */
#rps-you, #rps-com {
  width: 50%;
  padding: 15px;
  text-align: center;
}
#rps-you-move, #rps-com-move {
  max-width: 100%;
  width: auto;
  height: 200px;
  margin-bottom: 10px;
}
#rps-you { background: #ffdada; }
#rps-com { background: #dcffdc; }

/* (C) SHARED PLAY & SCORE */
#rps-play, #rps-score {
  width: 100%;
  padding: 10px;
  background: #444b9a;
}

/* (D) SELECT ROCK/PAPER/SCISSORS */
#rps-you-sel { flex-grow: 1; }
#rps-you-sel, #rps-you-go { padding: 10px; }

/* (E) SCORE */
#rps-score { color: #fff; }

## rps.html
<!DOCTYPE html>
<html>
  <head>
    <title>Javascript Rock Paper Scissors Demo</title>
    <link href="rps.css" rel="stylesheet">
    <script src="rps.js"></script>
  </head>
  <body>
    <div id="rps-game">
      <!-- (A) YOUR MOVE -->
      <div id="rps-you">
        <h2>YOUR MOVE</h2>
        <img id="rps-you-move">
      </div>

      <!-- (B) COMPUTER'S MOVE -->
      <div id="rps-com">
        <h2>COMPUTER'S MOVE</h2>
        <img id="rps-com-move">
      </div>

      <!-- (C) SELECT ROCK/PAPER/SCISSORS -->
      <div id="rps-play">
        <select id="rps-you-sel" disabled>
          <option value="rock">Rock</option>
          <option value="paper">Paper</option>
          <option value="scissors">Scissors</option>
        </select>
        <input id="rps-you-go" type="button" value="Go!" disabled>
      </div>

      <!-- (D) SCOREBOARD -->
      <div id="rps-score">
        Win - <span id="rps-win">0</span> |
        Lose - <span id="rps-lose">0</span> |
        Draw - <span id="rps-draw">0</span>
      </div>
    </div>
  </body>
</html>

## rps.js
// ROCK PAPER SCISSORS IMAGE SOURCE - WIKIPEDIA
// https://commons.wikimedia.org/wiki/File:Pierre_ciseaux_feuille_l%C3%A9zard_spock_aligned.svg
var rps = {
  // (A) PRELOAD IMAGES
  load : () => {
    let loaded = 0;
    for (let i of ["game-rock.png", "game-paper.png", "game-scissors.png"]) {
      let img = new Image();
      img.onload = () => {
        loaded++;
        if (loaded == 3) { rps.init(); }
      };
      img.src = i;
    }
  },

  // (B) INIT GAME
  eYou : null, // your move html image
  eCom : null, // computer move html image
  eSel : null, // html rock, scissors, paper selector
  eGo : null, // html go button
  eWin : null, wins : 0, // wins counter
  eLose: null, loses : 0, // loses counter
  eDraw : null, draws : 0, // draws counter
  init : () => {
    // (B1) GET HTML ELEMENTS
    rps.eYou = document.getElementById("rps-you-move");
    rps.eCom = document.getElementById("rps-com-move");
    rps.eSel = document.getElementById("rps-you-sel");
    rps.eGo = document.getElementById("rps-you-go");
    rps.eWin = document.getElementById("rps-win");
    rps.eLose = document.getElementById("rps-lose");
    rps.eDraw = document.getElementById("rps-draw");

    // (B2) UPDATE IMAGE WHEN CHANGING ROCK/PAPER/SCISSORS
    rps.eSel.onchange = () => rps.eYou.src = `game-${rps.eSel.value}.png`;
    rps.eYou.src = `game-${rps.eSel.value}.png`;

    // (B3) WHEN USER HITS "GO!"
    rps.eGo.onclick = rps.game;

    // (B4) UNLOCK CONTROLS
    rps.eSel.disabled = false;
    rps.eGo.disabled = false;
  },

  // (C) GAME "ENGINE"
  game : () => {
    // (C1) RANDOM COMPUTER MOVE
    var comMove = Math.random();
    if (comMove <= 0.33) { comMove = "rock"; }
    else if (comMove <= 0.67) { comMove = "paper"; }
    else { comMove = "scissors"; }

    // (C2) UPDATE COMPUTER MOVE GRAPHIC
    rps.eCom.src = `game-${comMove}.png`;

    // (C3) WIN, LOSE, OR DRAW?
    var youMove = rps.eSel.value;

    // (C3-1) DRAW
    if (youMove == comMove) {
      rps.draws++; rps.eDraw.innerHTML = rps.draws;
      alert("DRAW");
    } else {
      // (C3-2) CHECK
      let win = true;
      switch (youMove) {
        case "rock":
          if (comMove=="paper") { win = false; }
          break;
        case "paper":
          if (comMove=="scissors") { win = false; }
          break;
        case "scissors":
          if (comMove=="rock") { win = false; }
          break;
      }

      // (C3-3) UPDATE SCOREBOARD
      if (win) {
        rps.wins++; rps.eWin.innerHTML = rps.wins;
        alert("YOU WIN");
      } else {
        rps.loses++; rps.eLose.innerHTML = rps.loses;
        alert("YOU LOSE");
      }
    }
  }
};
window.addEventListener("load", rps.load);
	/* (A) GAME WRAPPER + LAYOUT */
	#rps-game * {
	font-family: Arial, Helvetica, sans-serif;
	box-sizing: border-box;
	}
	#rps-game, #rps-play {
	display: flex;
	flex-wrap: wrap;
	}
	#rps-game { max-width: 600px; }

	/* (B) MOVES */
	#rps-you, #rps-com {
	width: 50%;
	padding: 15px;
	text-align: center;
	}
	#rps-you-move, #rps-com-move {
	max-width: 100%;
	width: auto;
	height: 200px;
	margin-bottom: 10px;
	}
	#rps-you { background: #ffdada; }
	#rps-com { background: #dcffdc; }

	/* (C) SHARED PLAY & SCORE */
	#rps-play, #rps-score {
	width: 100%;
	padding: 10px;
	background: #444b9a;
	}

	/* (D) SELECT ROCK/PAPER/SCISSORS */
	#rps-you-sel { flex-grow: 1; }
	#rps-you-sel, #rps-you-go { padding: 10px; }

	/* (E) SCORE */
	#rps-score { color: #fff; }
	<!DOCTYPE html>
	<html>
	<head>
	<title>Javascript Rock Paper Scissors Demo</title>
	<link href="rps.css" rel="stylesheet">
	<script src="rps.js"></script>
	</head>
	<body>
	<div id="rps-game">
	<!-- (A) YOUR MOVE -->
	<div id="rps-you">
	<h2>YOUR MOVE</h2>
	<img id="rps-you-move">
	</div>

	<!-- (B) COMPUTER'S MOVE -->
	<div id="rps-com">
	<h2>COMPUTER'S MOVE</h2>
	<img id="rps-com-move">
	</div>

	<!-- (C) SELECT ROCK/PAPER/SCISSORS -->
	<div id="rps-play">
	<select id="rps-you-sel" disabled>
	<option value="rock">Rock</option>
	<option value="paper">Paper</option>
	<option value="scissors">Scissors</option>
	</select>
	<input id="rps-you-go" type="button" value="Go!" disabled>
	</div>

	<!-- (D) SCOREBOARD -->
	<div id="rps-score">
	Win - <span id="rps-win">0</span> \|
	Lose - <span id="rps-lose">0</span> \|
	Draw - <span id="rps-draw">0</span>
	</div>
	</div>
	</body>
	</html>
	// ROCK PAPER SCISSORS IMAGE SOURCE - WIKIPEDIA
	// https://commons.wikimedia.org/wiki/File:Pierre_ciseaux_feuille_l%C3%A9zard_spock_aligned.svg
	var rps = {
	// (A) PRELOAD IMAGES
	load : () => {
	let loaded = 0;
	for (let i of ["game-rock.png", "game-paper.png", "game-scissors.png"]) {
	let img = new Image();
	img.onload = () => {
	loaded++;
	if (loaded == 3) { rps.init(); }
	};
	img.src = i;
	}
	},

	// (B) INIT GAME
	eYou : null, // your move html image
	eCom : null, // computer move html image
	eSel : null, // html rock, scissors, paper selector
	eGo : null, // html go button
	eWin : null, wins : 0, // wins counter
	eLose: null, loses : 0, // loses counter
	eDraw : null, draws : 0, // draws counter
	init : () => {
	// (B1) GET HTML ELEMENTS
	rps.eYou = document.getElementById("rps-you-move");
	rps.eCom = document.getElementById("rps-com-move");
	rps.eSel = document.getElementById("rps-you-sel");
	rps.eGo = document.getElementById("rps-you-go");
	rps.eWin = document.getElementById("rps-win");
	rps.eLose = document.getElementById("rps-lose");
	rps.eDraw = document.getElementById("rps-draw");

	// (B2) UPDATE IMAGE WHEN CHANGING ROCK/PAPER/SCISSORS
	rps.eSel.onchange = () => rps.eYou.src = `game-${rps.eSel.value}.png`;
	rps.eYou.src = `game-${rps.eSel.value}.png`;

	// (B3) WHEN USER HITS "GO!"
	rps.eGo.onclick = rps.game;

	// (B4) UNLOCK CONTROLS
	rps.eSel.disabled = false;
	rps.eGo.disabled = false;
	},

	// (C) GAME "ENGINE"
	game : () => {
	// (C1) RANDOM COMPUTER MOVE
	var comMove = Math.random();
	if (comMove <= 0.33) { comMove = "rock"; }
	else if (comMove <= 0.67) { comMove = "paper"; }
	else { comMove = "scissors"; }

	// (C2) UPDATE COMPUTER MOVE GRAPHIC
	rps.eCom.src = `game-${comMove}.png`;

	// (C3) WIN, LOSE, OR DRAW?
	var youMove = rps.eSel.value;

	// (C3-1) DRAW
	if (youMove == comMove) {
	rps.draws++; rps.eDraw.innerHTML = rps.draws;
	alert("DRAW");
	} else {
	// (C3-2) CHECK
	let win = true;
	switch (youMove) {
	case "rock":
	if (comMove=="paper") { win = false; }
	break;
	case "paper":
	if (comMove=="scissors") { win = false; }
	break;
	case "scissors":
	if (comMove=="rock") { win = false; }
	break;
	}

	// (C3-3) UPDATE SCOREBOARD
	if (win) {
	rps.wins++; rps.eWin.innerHTML = rps.wins;
	alert("YOU WIN");
	} else {
	rps.loses++; rps.eLose.innerHTML = rps.loses;
	alert("YOU LOSE");
	}
	}
	}
	};
	window.addEventListener("load", rps.load);