Home >Web Front-end >JS Tutorial >How to implement a balloon game in javascript+css3
This is a simple but impressive little game. The implementation code of the balloon-playing game is mainly based on js and css3. Drawing balloons is based on css3. Please refer to this article for the specific implementation code
Effect knowledge points:
css3 balloon drawing, custom attribute application, random array, DOM element operation, advanced callback function and parameter retransmission, dynamic layout, mouse events , timer application, new CSS3 styles, etc.
The css code is as follows:
<style> {margin:0;padding:0;} body{background:#434343;overflow:hidden} .balloon{ position:absolute; left:0; top:0; margin:auto; width:160px; height:160px; 圆角: 左上 右上 右下 左下 / css3旋转 顺时针旋转45度 / background:#faf9f9; x轴的位置 y轴的位置 影子扩散程度 模糊度 颜色 / } .balloon:after{ 伪元素的内容 / display:block; position:absolute;
Because the balloon is rotating, the right bottom is actually the lower right corner*/
right:0px; width:0px; height:0px; border:8px solid #dbbdbd; border-top-color:transparent; border-bottom-color:transparent; border-left-color:transparent; transform:rotate(45deg); border-radius:16px; } #wrap{ width:200px; height:200px; background:red; } </style>
The javascript code is as follows:
<script> var num = 10; // 声明遍历num 为p的数量 //var oBody = document.querySelector('body'); //h5 api 获取元素的方法 var oBody=document.documentElement || document.body; //body获取兼容性写法 var wW=window.innerWidth; //获取浏览器窗口的宽度 var wH=window.innerHeight; //获取浏览器窗口高度 var timer=null; //初始化定时器变量 init(num); function init(num){ for(var i=0;i<num;i++){ //for循环 循环加工厂 var randomL=Math.random()*wW; // 随机left范围 randomL=Math.min(wW-160,randomL); //规范left位置 var balloon = document.createElement('p'); //用js生成标签 balloon.className='balloon'; //给创建的p元素设置类名 balloon.style.left=randomL+'px'; //改变元素的样式中的left的值 balloon.style.top=wH+'px'; balloon.speed=Math.random()*5+1; //自定义属性 创建元素的时候添加 oBody.appendChild(balloon); //body中添加 元素对象 } } timer=setInterval(function(){ var oBall=document.querySelectorAll('.balloon');//获取页面所有的气球 for(var i=0,len=oBall.length;i<len;i++){ oBall[i].style.top = oBall[i].offsetTop-oBall[i].speed+'px'; oBall[i].onclick=function(){ //谁 触发了什么 谁做了什么事情 crash(this,function(xxx){ clearInterval(xxx.timer); //清除动画定时器 xxx.parentNode.removeChild(xxx); }); //this.parentNode.removeChild(this); init(1); } } },30); function crash(ele,cb){ //被点击之后撒气效果 ele.timeouter=setTimeout(function(){ cb&&cb(ele); },500) ele.timer=setInterval(function(){ ele.speed++; //加速度自增 ele.style.top=ele.offsetTop-ele.speed+'px'; //加速逃离 ele.style.width=ele.offsetWidth-10+'px'; //宽度减少 ele.style.height=ele.offsetHeight-10+'px'; //高度减少 },30) } </script>
The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
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