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javascript實現簡單載入隨機色方塊_javascript技巧

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用片段載入小方塊實現簡單的隨機色塊，直接上代碼：
效果圖：

具體代碼：

<!DOCTYPE html><html><head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta charset="utf-8"> <title>koringz</title> <link rel="stylesheet" href="css/demo.css"></head><body> <div class="container">  <div class="main">   <div class="colorful"></div>  </div> </div></body></html>

css代碼：

* { -webkit-box-sizing: border-box;  -moz-box-sizing: border-box;   box-sizing: border-box;}html { font-size: 10px; -webkit-tap-highlight-color: transparent;}body { margin: 0; padding: 0; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.42857143; color: #333; background-color: rgba(211,232,132,0.8);}.container { overflow: visible;}.main { position: relative; width: 90%; height:200px; margin:auto;}.colorful { overflow: visible; width: 100%; height: 100%;}.colorful > a { float: left; display: block; width: 50px; height: 50px; zoom:2;}.colorful > a:hover { -webkit-animation:infinite 2s ease-in-out start-roll; -moz-animation:infinite 2s ease-in-out start-roll;   animation:infinite 2s ease-in-out start-roll;}@-webkit-keyframes start-roll{ 0% {  -webkit-transform: rotate(0deg); /*chrome*/  -moz-transform: rotate(0deg); /*Firefox*/  -ms-transform: rotate(0deg); /*IE*/  transform: rotate(0deg);  -webkit-transition: opacity .3s linear;  transition: opacity .3s linear;  opacity: .5;  filter: alpha(opacity=50);  zoom:1; } 50% {  -webkit-transform: rotate(180deg); /*chrome*/  -moz-transform: rotate(180deg); /*Firefox*/  -ms-transform: rotate(180deg); /*IE*/  transform: rotate(180deg);  -webkit-transition: opacity 1s linear;  transition: opacity 1s linear;  opacity: 1;  filter: alpha(opacity=100);   zoom:2; } 100% {  -webkit-transform: rotate(360deg); /*chrome*/  -moz-transform: rotate(360deg); /*Firefox*/  -ms-transform: rotate(360deg); /*IE*/  transform: rotate(360deg);  -webkit-transition: opacity .3s linear;  transition: opacity .3s linear;  opacity: .5;  filter: alpha(opacity=50);  zoom:1; }}@-moz-keyframes start-roll{ 0% {  -webkit-transform: rotate(0deg); /*chrome*/  -moz-transform: rotate(0deg); /*Firefox*/  -ms-transform: rotate(0deg); /*IE*/  transform: rotate(0deg);  -webkit-transition: opacity .3s linear;  transition: opacity .3s linear;  opacity: .5;  filter: alpha(opacity=50); } 50% {  -webkit-transform: rotate(180deg); /*chrome*/  -moz-transform: rotate(180deg); /*Firefox*/  -ms-transform: rotate(180deg); /*IE*/  transform: rotate(180deg);  -webkit-transition: opacity 1s linear;  transition: opacity 1s linear;  opacity: .5;  filter: alpha(opacity=50); } 100% {  -webkit-transform: rotate(360deg); /*chrome*/  -moz-transform: rotate(360deg); /*Firefox*/  -ms-transform: rotate(360deg); /*IE*/  transform: rotate(360deg);  -webkit-transition: opacity .3s linear;  transition: opacity .3s linear;  opacity: .5;  filter: alpha(opacity=50); }}@keyframes start-roll{ 0% {  -webkit-transform: rotate(0deg); /*chrome*/  -moz-transform: rotate(0deg); /*Firefox*/  -ms-transform: rotate(0deg); /*IE*/  transform: rotate(0deg);  -webkit-transition: opacity .3s linear;  transition: opacity .3s linear;  opacity: .5;  filter: alpha(opacity=50); } 50% {  -webkit-transform: rotate(180deg); /*chrome*/  -moz-transform: rotate(180deg); /*Firefox*/  -ms-transform: rotate(180deg); /*IE*/  transform: rotate(180deg);  -webkit-transition: opacity 1s linear;  transition: opacity 1s linear;  opacity: .5;  filter: alpha(opacity=50); } 100% {  -webkit-transform: rotate(360deg); /*chrome*/  -moz-transform: rotate(360deg); /*Firefox*/  -ms-transform: rotate(360deg); /*IE*/  transform: rotate(360deg);  -webkit-transition: opacity .3s linear;  transition: opacity .3s linear;  opacity: .5;  filter: alpha(opacity=50); }}

js代碼：

(function (window) { var document = window.document; function on(elem, evtnm, eventhd) {  var onevtnm = 'on' + evtnm;  elem[onevtnm] = eventhd; } function grc() {  var val = [], i = 0;  while (++i <= 3) {   val.push(Math.floor(Math.random() * 255));  }  return 'rgb(' + val.join() + ')'; } function fbc() {  var el = document.querySelectorAll('.colorful')[0],   total = Math.floor(el.offsetWidth / 50) * Math.floor(el.offsetHeight / 50),   df = document.createDocumentFragment(),   a;  while (total-- > 0) {   a = document.createElement('a');   a.style.backgroundColor = grc();   df.appendChild(a);  }  el.appendChild(df); } on(window, 'load', function () {  fbc(); });})(window)

希望本文所述對大家學習javascript程式設計有所協助。

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