線上演示原始碼下載
下面我們來看看實現這款進度條的過程和原始碼,程式碼主要由HTML、CSS以及jQuery組成,實現過程也相對比較簡單。
HTML程式碼:
<div id="wrapper"> <div class="loader-container"> <div class="meter">0</div> <span class="runner"></span> </div> </div>
這裡定義了進度條的容器,以及進度百分比。
CSS程式碼:
.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; } }
這裡利用了CSS3的動畫屬性,定義了從0%到100%的動畫效果。
jQuery程式碼:
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程式碼實現了進度條的實時更新,並且百分比數字也實時更新。
線上演示 原始碼下載
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