话不多说，上代码——
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>打砖块小游戏</title><style>#box{width: 600px;height: 650px;border: 5px solid rgb(168, 139, 8);position: relative;left: 500px;background:linear-gradient(rgb(19, 192, 120),rgb(47, 32, 114));}#ball{width: 20px;height: 20px;border-radius: 10px;background-color: white;position: absolute;top: 560px;box-shadow: 0px 0px 3px 3px aqua;}#btn{width: 150px;height: 90px;position: fixed;left: 730px;top: 350px;border-radius: 10px;font-size: 24px;cursor: pointer;}#slider{width: 120px;height: 20px;background-color: rgb(168, 139, 8);position: absolute;top: 585px;border-radius: 10px;box-shadow: 0px 0px 2px 2px red;cursor: pointer;}#brick div{width: 98px;height: 20px;float: left;border: 1px solid black;}#tip{width: 280px;position:fixed;top: 100px;left: 150px;border: 1px solid black;text-indent: 2em;padding: 10px;border-radius: 20px;}#grade{width: 180px;position:fixed;top: 100px;left: 1150px;border: 1px solid black;text-indent: 2em;padding: 10px;border-radius: 20px;}#grade h3{font-weight: 500;}</style></head><body><div id="box"><div id="ball"></div><div id="slider"></div><div id="brick"></div></div><div id="tip"><h1>提示</h1><p>点击按钮开始游戏</p><p>方法1：使用鼠标按住滑块，左右拖动，反弹小球</p><p>方法2：使用键盘“左”“右”方向键控制滑块移动，按住快速移动</p><p>小球触碰到底部为失败</p><p>清空所有方块游戏胜利</p></div><div id="grade"><h3>游戏强度：</h3><h2>XXX</h2><h3>得分:</h3><h1>00</h1></div><button id="btn">开始游戏</button><script>var box = document.getElementById("box");var ball = document.getElementById("ball");var btn = document.getElementById("btn");var slider = document.getElementById("slider")var obrick = document.getElementById("brick")var brickArr = obrick.getElementsByTagName("div")var grade = document.getElementById("grade")var rank = grade.children[1]var score = grade.children[3]var sco = 0;var timer;var isRunning = false;var speedX = rand(3,12);var speedY = -rand(3,12);var num =speedX-speedY;console.log(num)switch(num){case 6:case 7:case 8:rank.innerHTML="简单";break;case 9:case 10:case 11:rank.innerHTML="一般";break;case 12:case 13:case 14:rank.innerHTML="中等";break;case 15:case 16:case 17:rank.innerHTML="难"break;case 18:case 19:case 20:rank.innerHTML="很难"slider.style.width = 100+"px";break;case 21:case 22:rank.innerHTML="特别难"slider.style.width = 80+"px";break;case 23:case 24:rank.innerHTML="哭了"slider.style.width = 60+"px";break;}//随机生成小球与滑块位置var beginGo = rand(100,500)ball.style.left = beginGo +40 +"px"slider.style.left = beginGo +"px"//开始按钮点击事件btn.onclick = function(){btn.style.display="none";isRunning = true;clearInterval(timer);timer = setInterval(function(){//获取小球初始位置var ballLeft = ball.offsetLeft;var ballTop = ball.offsetTop;//获取小球运动之后位置var nextleft = ballLeft + speedX;var nexttop = ballTop + speedY;//水平边界判断，当小球的left值小于容器左边界或者大于容器右边界时，将水平方向速度取反if(nextleft<=0||nextleft>=box.offsetWidth-ball.offsetWidth-10){speedX=-speedX;}//垂直边界判断，当小球的top值小于容器上边界时，将垂直方向速度取反if(nexttop<=0){speedY=-speedY;}//当小球触碰到下边界时，提示“游戏失败”，重新刷新页面if(nexttop>box.offsetHeight-ball.offsetHeight){location.reload();alert("You were dead！")}//将运动后的位置重新赋值给小球ball.style.left = nextleft+"px";ball.style.top= nexttop+"px";//小球与滑块的碰撞检测if(knock(ball,slider)){speedY=-speedY;}//小球与方块的碰撞检测for(var j=0; j<brickArr.length;j++){if(knock(brickArr[j],ball)){speedY=-speedYobrick.removeChild(brickArr[j]);sco++;score.innerHTML=sco;break;}}//当容器中方块数量为0时，宣布“游戏胜利”，刷新页面if(brickArr.length<=0){location.reload();alert("You win!")}},20)}//鼠标控制滑块slider.onmousedown = function(e){var e = e||window.event;//获取滑块初始位置var offsetX = e.clientX - slider.offsetLeft;if(isRunning){document.onmousemove = function(e){var e = e||window.event;var l =e.clientX-offsetX;if(l<=0){l=0;}if(l>=box.offsetWidth-slider.offsetWidth-10){l=box.offsetWidth-slider.offsetWidth-10 ;}slider.style.left = l + "px";}}}document.onmouseup = function(){document.onmousemove = null;}//按键控制滑块document.onkeydown = function(e){var e = e||window.event;var code = e.keyCode || e.which;var offsetX = slider.offsetLeft;if(isRunning){switch(code){case 37:if(offsetX<=0){slider.style.left=0break;}slider.style.left = offsetX*4/5 + "px";break;case 39:if(offsetX>=box.offsetWidth-slider.offsetWidth-10){slider.style.left=box.offsetWidth-slider.offsetWidth;break;}slider.style.left = (box.offsetWidth-slider.offsetWidth-offsetX)/5 +offsetX + "px";break;}}}createBrick(72)//容器内创建方块function createBrick(n){var oBrick = document.getElementById("brick")//在大盒子brick中插入n个div方块，并给予随机颜色for(var i = 0; i<n; i++){var node = document.createElement("div");node.style.backgroundColor= color();oBrick.appendChild(node);}//获取所有的方块var brickArr = obrick.getElementsByTagName("div")//根据每个方块当前所在位置，将left与top值赋给方块for(var i=0;i<brickArr.length;i++){brickArr[i].style.left = brickArr[i].offsetLeft+"px";brickArr[i].style.top = brickArr[i].offsetTop+"px";}//将所有方块设置成绝对定位，注意这一步与上一步顺序不能调换for(var i =0;i<brickArr.length;i++){brickArr[i].style.position="absolute";}}//随机生成颜色function color(){var result= "#";for(var i=0;i<6;i++){result += rand(0,15).toString(16)// 把十进制的数字变成十六进制的字符串:0 1 ...9 a b c d f}return result;}//随机数生成function rand(n,m){return n+parseInt(Math.random()*(m-n+1));}//碰撞检测函数function knock(node1,node2){var l1 = node1.offsetLeft;var r1 = node1.offsetLeft + node1.offsetWidth;var t1 = node1.offsetTop;var b1 = node1.offsetTop+node1.offsetHeight;var l2 = node2.offsetLeft;var r2 = node2.offsetLeft + node2.offsetWidth;var t2 = node2.offsetTop;var b2 = node2.offsetTop+node2.offsetHeight;if(l2>r1||r2<l1||t2>b1||b2<t1){return false;}else{return true;}}</script></body></html>
原文链接：/horizon12/article/details/108646596
版权声明：本文为博主原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接和本声明。
