Code_Dump/SnakeGame.html at main · BalajiG2000/Code_Dump · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Snake</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style type="text/css">
        table.chess, .chess tr,.chess td {
            border: 1px solid gray;
            border-collapse: collapse;
            padding: 3px;
        }
        td {
            height: 10px;
            width: 10px;
        }
        .snake {
            background-color: black;
            border: 1px solid black !important;
        }
        .food {
            background-color: lime;
        }
        button {
            width: 60px;
            height: 30px;
        }
    </style>
</head>
<body>

    <h1>
        <b>HiScore: </b><span id="hiscore"></span><br/>
        <b>Score: </b><span id="score"></span>
    </h1>


    <table class="chess">
        <script type="text/javascript">
            var height = 20;
            var width = 20;
            for (var i=0; i < height; i++) {
                document.write(`<tr>`)
                for (var j=0; j < width; j++) {
                    document.write(`<td class="cell" id="${i}-${j}"></td>`);
                }
                document.write(`</tr>`);
            }
        </script>
    </table>

    <table>
        <tr>
            <td></td>
            <td><button onclick="changeMove(-1,0)">UP</button></td>
            <td></td>
        </tr>
        <tr>
            <td><button onclick="changeMove(0,-1)">LEFT</button></td>
            <td><button onclick="changeMove(1,0)">DOWN</button></td>
            <td><button onclick="changeMove(0,1)">RIGHT</button></td>
        </tr>
    </table>
        <span id="help">Press any key to start...</span>

    <script>

        var initial_loc// = [[8,2],[8,3],[8,4]];
        var move// = [0, 1];
        var food// = [null, null];
        var score// = 0;
        var hiscore = 0;
        var speed// = 150;
        var canmove// = true;
        var playing// = false;
        function changeMove(h, w)
        {

            go();

            if (!canmove) return;

            canmove = false;

            if (h == 1 && move[0] == -1) return;
            if (h == -1 && move[0] == 1) return;
            if (w == 1 && move[1] == -1) return;
            if (w == -1 && move[1] == 1) return;
            move[0] = h;
            move[1] = w;
        }

        function clearBoard()
        {
            for (var h=0; h<height;h++)
            {
                for (var w=0; w<width;w++)
                {
                    document.getElementById(h+'-'+w).className = "cell";
                }
            }
        }

        function placeSnake()
        {
            for (var i = 0; i < initial_loc.length; i++)
            {
                var cell = document.getElementById(initial_loc[i][0]+'-'+initial_loc[i][1]);
                cell.className = "snake";
            }
        }

        function placeFood()
        {
            document.getElementById("score").innerHTML = score;
            document.getElementById("hiscore").innerHTML = hiscore;
            food = [
                Math.floor(Math.random() * height),
                Math.floor(Math.random() * width)
            ];
            if (initial_loc.some(loc=>(loc[0]==food[0] && loc[1]==food[1]))) {
                placeFood();
            }

            var cell = document.getElementById(food[0]+'-'+food[1]);
            cell.className = "food";
        }

        function start()
        {
            var cell = document.getElementById(initial_loc[0][0]+'-'+initial_loc[0][1]);
            cell.className = "cell";

            var x = initial_loc.shift();
            var i = initial_loc.length-1;
            var next_move = [

                initial_loc[i][0]+move[0],
                initial_loc[i][1]+move[1]
            ];

            if (next_move[0] == height) {
                next_move[0] = 0;
            } else if (next_move[0] == -1) {
                next_move[0] = height-1;
            } else if (next_move[1] == width) {
                next_move[1] = 0;
            } else if (next_move[1] == -1) {
                next_move[1] = width-1;
            }

            if (initial_loc.some(loc=>(loc[0]==next_move[0] && loc[1]==next_move[1]))) {
                gameOver();
                return;
            }

            initial_loc.push(next_move);

            if (next_move[0] == food[0] && next_move[1] == food[1]) {
               initial_loc.unshift(x);
               score++;
               placeFood();
            }


            placeSnake();
            canmove = true;
            if (playing)
                setTimeout(start, speed-(score*1.75));
        }

        function gameOver()
        {
            alert("Game Over");
            playing = false;
            init();
        }

        function go()
        {
            if (!playing) {
                playing = true;
                start();
                placeFood();
                document.getElementById("help").style.display="none";
            }
        }

        document.body.onkeypress = (key) => {

            go();

            if (key.keyCode != 0){
                switch (key.keyCode) {
                    case 37: changeMove(0,-1); break;
                    case 38: changeMove(-1,0); break;
                    case 39: changeMove(0,1); break;
                    case 40: changeMove(1,0); break;
                }
            }else{
                switch(key.key) {
                    case 'a': changeMove(0,-1); break;
                    case 'w': changeMove(-1,0); break;
                    case 'd': changeMove(0,1); break;
                    case 's': changeMove(1,0); break;
                }
            }

        }

        function init () {
                if (score > hiscore){
                    hiscore = score;
                    alert("New High Score")
                }
                initial_loc = [[8,2],[8,3],[8,4]];
                move = [0, 1];
                food = [null, null];
                score = 0;
                speed = 150;
                canmove = true;
                clearBoard();
                placeSnake();
                document.getElementById("help").style.display="block"
        }

        init();
    </script>

</body>
</html>