下面我们来看看实现这款进度条的过程和源码,代码主要由HTML、CSS以及jQuery组成,实现过程也相对比较简单。
HTML代码:
<div id="wrapper"> <div class="loader-container"> <div class="meter">0</div> <span class="runner"></span> </div> </div>
这里定义了进度条的容器,以及进度百分比。
CSS代码:
.loader-container { height: 6px; width: 600px; position: absolute; top: 50%; left: 50%; margin-top: -3px; margin-left: -300px; background-color: transparent; background-image: -webkit-linear-gradient(left, #5bd8ff, #ff0000); background-image: -moz-linear-gradient(left, #5bd8ff, #ff0000); background-image: -o-linear-gradient(left, #5bd8ff, #ff0000); background-image: -ms-linear-gradient(left, #5bd8ff, #ff0000); background-image: linear-gradient(left, #5bd8ff, #ff0000); box-shadow: inset 0 -2px 2px rgba(0, 0, 0, 0.4); border-radius: 3px 0 0 3px;}.loader-container:after { content: ""; display: block; position: absolute; right: 0; top: 50%; width: 1em; height: 1em; border-radius: 50%; margin-top: -0.5em; margin-right: -1em; background-image: -webkit-linear-gradient(top, #000000, #212121); background-image: -moz-linear-gradient(top, #000000, #212121); background-image: -o-linear-gradient(top, #000000, #212121); background-image: -ms-linear-gradient(top, #000000, #212121); background-image: linear-gradient(top, #000000, #212121);}.loader-container.done:after { background: Red;}.run .runner { content: ""; position: absolute; right: 0; height: 100%; width: 0%; background-color: transparent; background-image: -webkit-linear-gradient(top, #000000, #212121); background-image: -moz-linear-gradient(top, #000000, #212121); background-image: -o-linear-gradient(top, #000000, #212121); background-image: -ms-linear-gradient(top, #000000, #212121); background-image: linear-gradient(top, #000000, #212121); animation: loader 10s linear;}.meter { position: absolute; top: 0; right: 0; font-size: 2em; margin-top: .3em; color: #ff0000; animation: meter 10s linear; text-shadow: 0 -1px 0 #333333;}.meter:after { content: "%";}@keyframes loader { 0% { width: 100%; } 100% { width: 0%; }}@keyframes meter { 0% { color: #5bd8ff; } 100% { color: #ff0000; }}
这里利用了CSS3的动画属性,定义了从0%到100%的动画效果。
jQuery代码:
var Loader = function () { var loader = document.querySelector(‘.loader-container‘), meter = document.querySelector(‘.meter‘), k, i = 1, counter = function () { if (i <= 100) { meter.innerHTML = i.toString(); i++; } else { window.clearInterval(k); } }; return { init: function (options) { options = options || {}; var time = options.time ? options.time : 0, interval = time/100; loader.classList.add(‘run‘); k = window.setInterval(counter, interval); setTimeout(function () { loader.classList.add(‘done‘); }, time); }, }}();Loader.init({ // If you have changed the @time in LESS, update this number to the corresponding value. Measured in miliseconds. time: 10000});
用jQuery代码实现了进度条的实时更新,并且百分比数字也实时更新。
在线演示 源码下载
来自:http://www.html5tricks.com/css3-progress-bar-line.html
原文:http://my.oschina.net/zyxchuxin/blog/479033