这篇文章主要介绍了可以随进度显示不同颜色的css3进度条,文章最后有下载地址,需要的朋友可以参考下
一款进度条,它的外观是一条直线,末端有个小球,在进度变化时可以显示数字百分比,更可以用不同颜色来表示当前进度的状态。来看看效果图。
接下来我们来分析一下这款HTML5进度条的实现源码,篇幅有限,我们只挑核心的代码来说。
HTML代码很简单,构造一个进度条容器和数字百分比容器:
复制代码代码如下: <div id="wrapper"> <div class="loader-container"> <div class="meter">0</div> <span class="runner"></span> </div> </div>
首先我们来对进度条的容器进行样式渲染,利用CSS3的渐变属性来实现不同进度变换颜色的效果:
复制代码代码如下: .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); }
接下来是末端小圆球的样式:
复制代码代码如下: .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; }
这里也是利用的CSS3的渐变属性。
然后是数字百分比的样式属性,这里随着进度变化,数字百分比的颜色也会发生变化。
复制代码代码如下: .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: "%"; }
最后,我们再来看看JS代码,其实js要完成的工作非常简单,只需要将CSS3渲染好的进度条动起来就好,看代码:
复制代码代码如下: 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 });
源码打包下载地址:http://xiazai.jb51.net/201403/tools/css3jdt.rar |