How to use CSS3 and JS to create a dynamic background of rising blocks-CSS Tutorial-php.cn

How to use CSS3 and JS to create a dynamic background of rising blocks

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Release： 2017-11-25 15:34:19

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We know that CSS3 can make many cool animations, so how powerful would it be if CSS3 and JS were combined? Today I will teach you how to use CSS and JS to create a dynamic background of rising blocks. Let’s take a look.

HTML:

<!DOCTYPE html>
<html>
 <head> 
  <meta charset="UTF-8">
  <title>Glunefish</title>
  <link rel="stylesheet" href="css/style.css">
 </head>
   <body> 
   <div id="F-dynamicbg-box"> 
    <div> </div> 
    <div></div> 
    <div></div>
    <div></div> 
    <div></div> 
    <div></div> 
    <div></div> 
    <div></div> 
    <div></div> 
    <div></div> 
  </div>
 </body>
</html>

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CSS:

* { margin: 0; padding: 0; border: none; outline: 0; }
 body{ width: 100vw; height: 100vh; background: url(img/bg.png) no-repeat; background-size: cover; }
 #F-dynamicbg-box { width: 100vw; height: 100vh; position: absolute; top: 0; left: 0; overflow: hidden; }
 #F-dynamicbg-box > div { z-index: -9999; background-color: rgba(255,255,255,.1); position: absolute; top: 105vh; animation: dynamicDiv 30s linear infinite; } 
#F-dynamicbg-box > div:nth-of-type(1) { animation-delay: 1s }
 #F-dynamicbg-box > div:nth-of-type(2) { animation-delay: 3s }
 #F-dynamicbg-box > div:nth-of-type(3) { animation-delay: 6s } 
#F-dynamicbg-box > div:nth-of-type(4) { animation-delay: 9s }
 #F-dynamicbg-box > div:nth-of-type(5) { animation-delay: 12s } 
#F-dynamicbg-box > div:nth-of-type(6) { animation-delay: 4s } 
#F-dynamicbg-box > div:nth-of-type(7) { animation-delay: 15s } 
#F-dynamicbg-box > div:nth-of-type(8) { animation-delay: 18s }
 #F-dynamicbg-box > div:nth-of-type(9) { animation-delay: 20s }
 #F-dynamicbg-box > div:nth-of-type(10) { animation-delay: 16s }
 @keyframes dynamicDiv { form { top: 105vh; transform: scale(1.2); } 
to { top: -13vh; transform: scale(1) rotate(60deg); } }
JS:( JS初始化div形态 )
var box = document.getElementById(&#39;F-dynamicbg-box&#39;), div = box.getElementsByTagName(&#39;div&#39;), math = [0,1];for (var i=0;i<div.length;i++) { math[1] = F_getSJS(100,40,9) F_getSJS 请移步博客之前的取随机数了解if(math[1] != math[2]){ div[i].style.width = math[1] + &#39;px&#39;; div[i].style.height = math[1] + &#39;px&#39;; math[2] = math[1]; } } for(var i=0;i<div.length;i++){ div[i].style.left = F_getSJS(85,15,8) + &#39;vw&#39;; div[i].style.transform = &#39;rotate(&#39; + F_getSJS(360,5,9) + &#39;deg)&#39;; }

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All the codes are here. Interested friends can do it themselves. For more exciting content, please pay attention to php Chinese Other related articles online!