关于vue3:Vue3ElementPlusKoa2-全栈开发后台系统

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<!– <!DOCTYPE html>
<html xmlns=”http://www.w3.org/1999/xhtml”>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ />
<title>JS 贪吃蛇 </title>

<style type="text/css">
    #pannel table {border-collapse: collapse;}
    #pannel table td {
    border: 1px solid #808080;
    width: 10px;
    height: 10px;
    font-size: 0;
    line-height: 0;
    overflow: hidden;
    }
    #pannel table .snake {background-color: green;}
    #pannel table .food {background-color: blue;}
</style>
<script type="text/javascript">

var Direction = new function () {
    this.UP = 38;
    this.RIGHT = 39;
    this.DOWN = 40;
    this.LEFT = 37;
};


var Common = new function () {
    this.width = 20; /* 程度方向方格数 */
    this.height = 20; /* 垂直方向方格数 */
    this.speed = 250; /* 速度 值越小越快 */
    this.workThread = null;
};


var Main = new function () {var control = new Control();
    window.onload = function () {control.Init("pannel");
        /* 开始按钮 */
        document.getElementById("btnStart").onclick = function () {control.Start();
            this.disabled = true;
            document.getElementById("selSpeed").disabled = true;
            document.getElementById("selSize").disabled = true;
        };
        /* 调速度按钮 */
        document.getElementById("selSpeed").onchange = function () {Common.speed = this.value;}
        /* 调大小按钮 */
        document.getElementById("selSize").onchange = function () {
            Common.width = this.value;
            Common.height = this.value;
            control.Init("pannel");
        }
    };
};
/* 控制器 */
function Control() {this.snake = new Snake();
    this.food = new Food();
    /* 初始化函数，创建表格 */
        this.Init = function (pid) {var html = [];
        html.push("<table>");
        for (var y = 0; y < Common.height; y++) {html.push("<tr>");
            for (var x = 0; x < Common.width; x++) {html.push('<td id="box_'+ x +"_"+ y +'"> </td>');
            }
            html.push("</tr>");
        }
        html.push("</table>");
        this.pannel = document.getElementById(pid);
        this.pannel.innerHTML = html.join("");
    };
    /* 开始游戏 - 监听键盘、创立食物、刷新界面线程 */
    this.Start = function () {
        var me = this;
        this.MoveSnake = function (ev) {
            var evt = window.event || ev;
            me.snake.SetDir(evt.keyCode);
        };
        try {document.attachEvent("onkeydown", this.MoveSnake);
        } catch (e) {document.addEventListener("keydown", this.MoveSnake, false);
        }
        this.food.Create();
        Common.workThread = setInterval(function () {me.snake.Eat(me.food); me.snake.Move();}, Common.speed);
    };
}


/* 蛇 */
function Snake() {
    this.isDone = false;
    this.dir = Direction.RIGHT;
    this.pos = new Array(new Position());
    /* 挪动 - 擦除尾部，向前挪动，判断游戏完结 (咬到本人或者移出边界)*/
    this.Move = function () {document.getElementById("box_" + this.pos[0].X + "_" + this.pos[0].Y).className = "";
    // 所有 向前挪动一步
        for (var i = 0; i < this.pos.length - 1; i++) {this.pos[i].X = this.pos[i + 1].X;
            this.pos[i].Y = this.pos[i + 1].Y;
        }
    // 从新设置头的地位
        var head = this.pos[this.pos.length - 1];
        switch (this.dir) {
            case Direction.UP:
            head.Y--;
            break;
            case Direction.RIGHT:
            head.X++;
            break;
            case Direction.DOWN:
            head.Y++;
            break;
            case Direction.LEFT:
            head.X--;
            break;
        }
        this.pos[this.pos.length - 1] = head;
        // 遍历画蛇，同时判断游戏完结
        for (var i = 0; i < this.pos.length; i++) {
            var isExits = false;
            for (var j = i + 1; j < this.pos.length; j++)
                if (this.pos[j].X == this.pos[i].X && this.pos[j].Y == this.pos[i].Y) {
                    isExits = true;
                    break;
                }
                if (isExits) {this.Over();
                    /* 咬本人 */
                    break; 
                }
                var obj = document.getElementById("box_" + this.pos[i].X + "_" + this.pos[i].Y);
                if (obj) obj.className = "snake"; 
                else {this.Over();
                    /* 移出边界 */
                    break; 
                }
        }
            this.isDone = true;
    };
    /* 游戏完结 */
    this.Over = function () {clearInterval(Common.workThread);
        alert("游戏完结！");
        location.reload();}
/* 吃食物 */
    this.Eat = function (food) {var head = this.pos[this.pos.length - 1];
        var isEat = false;
        switch (this.dir) {
            case Direction.UP:
            if (head.X == food.pos.X && head.Y == food.pos.Y + 1) isEat = true;
            break;
            case Direction.RIGHT:
            if (head.Y == food.pos.Y && head.X == food.pos.X - 1) isEat = true;
            break;
            case Direction.DOWN:
            if (head.X == food.pos.X && head.Y == food.pos.Y - 1) isEat = true;
            break;
            case Direction.LEFT:
            if (head.Y == food.pos.Y && head.X == food.pos.X + 1) isEat = true;
            break;
        }
        if (isEat) {this.pos[this.pos.length] = new Position(food.pos.X, food.pos.Y);
            food.Create(this.pos);
        }
    };
    /* 管制挪动方向 */
    this.SetDir = function (dir) {switch (dir) {
            case Direction.UP:
            if (this.isDone && this.dir != Direction.DOWN) {this.dir = dir; this.isDone = false;}
            break;
            case Direction.RIGHT:
            if (this.isDone && this.dir != Direction.LEFT) {this.dir = dir; this.isDone = false;}
            break;
            case Direction.DOWN:
            if (this.isDone && this.dir != Direction.UP) {this.dir = dir; this.isDone = false;}
            break;
            case Direction.LEFT:
            if (this.isDone && this.dir != Direction.RIGHT) {this.dir = dir; this.isDone = false;}
            break;
        }
    };
}
/* 食物 */
function Food() {this.pos = new Position();
    /* 创立食物 - 随机地位创建设 */
        this.Create = function (pos) {document.getElementById("box_" + this.pos.X + "_" + this.pos.Y).className = "";
            var x = 0, y = 0, isCover = false;
            /* 排除蛇的地位 */
            do {x = parseInt(Math.random() * (Common.width - 1));
                y = parseInt(Math.random() * (Common.height - 1));
                isCover = false;
                if (pos instanceof Array) {for (var i = 0; i < pos.length; i++) {if (x == pos[i].X && y == pos[i].Y) {
                            isCover = true;
                            break;
                        }
                    }
                }
            } while (isCover);
            this.pos = new Position(x, y);
            document.getElementById("box_" + x + "_" + y).className = "food";
        };
}

function Position(x, y) {
    this.X = 0;
    this.Y = 0;
    if (arguments.length >= 1) this.X = x;
    if (arguments.length >= 2) this.Y = y;
}
</script>

</head>

<body>
<div id="pannel" style="margin-bottom: 10px;"></div>
    <select id="selSize">
        <option value="20">20*20</option>
        <option value="30">30*30</option>
        <option value="40">40*40</option>
    </select>
    <select id="selSpeed">
        <option value="500"> 速度 - 慢 </option>
        <option value="250" selected="selected"> 速度 - 中 </option>
        <option value="100"> 速度 - 快 </option>
    </select>
<input type="button" id="btnStart" value="开始" />
</body>

</html> –>

<!-- ++++++++++++++++++++++++++++++++++++++++ 贪吃蛇精简版，下面为较欠缺版 ++++++++++++++++++++++++++++++++++++++++  -->
<html>
    <body>
        <canvas id="can" width="400" height="400" style="background:Black"></canvas>
        <script>
            var sn=[42,41],dz=43,fx=1,n,ctx=document.getElementById("can").getContext("2d");
            function draw(t,c){
                ctx.fillStyle=c;
                ctx.fillRect(t%20*20+1,~~(t/20)*20+1,18,18);
            }
            document.onkeydown=function(e){fx=sn[1]-sn[0]==(n=[-1,-20,1,20][(e||event).keyCode-37]||fx)?fx:n};
            !function(){sn.unshift(n=sn[0]+fx);
                if(sn.indexOf(n,1)>0 || n<0||n>399||fx==1&&n%20==0||fx==-1&&n%20==19){return alert("GAME OVER");
                    refesh();} 
                draw(n,"Lime");
                if(n==dz){while(sn.indexOf(dz=~~(Math.random()*400))>=0);
                    draw(dz,"Yellow");
                }else{draw(sn.pop(),"Black");
                }
                setTimeout(arguments.callee,130);
            }();

            function refesh(){location.reload();
            }
        </script>
    </body>

正文完

发表至： vue3

2021-06-24

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