使用纯CSS+HTML实现的几种进度条
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进度条是一个非常常见的功能,实现起来也不难,一般我们都会用 作为一个这么常见的需求, whatwg 肯定是不会没有原生组件提供(虽然有我们也不一定会用),那么就让我们来看看有哪些有意思的进度条实现方式。 常规版 — div 一波流这是比较常规的实现方式,先看效果: 源码如下: <style> .progress1 { height: 20px; width: 300px; background-color: #f5f5f5; border-bottom-right-radius: 10px; border-top-right-radius: 10px; } .progress1::before { counter-reset: progress var(--percent, 0); content: counter(progress) '%\2002'; display: block; height: 20px; line-height: 20px; width: calc(300px * var(--percent, 0) / 100);
color: #fff; background-color: #2486ff; text-align: right; white-space: nowrap; overflow: hidden; border-bottom-right-radius: 10px; border-top-right-radius: 10px; } .btn { margin-top: 30px; } </style> <div id="progress1" class="progress1"></div> <button id="btn" class="btn">点我一下嘛~</button> <script> 'use strict'; let startTimestamp = (new Date()).getTime(); let currentPercentage = 0; let maxPercentage = 100; let countDelay = 100; let timer = null; let start = false; const percentageChange = () => { const currentTimestamp = (new Date()).getTime(); if (currentTimestamp - startTimestamp >= countDelay) { currentPercentage++; startTimestamp = (new Date()).getTime(); progress1.style = `--percent: ${currentPercentage}`; }; if (currentPercentage < maxPercentage) { timer = window.requestAnimationFrame(percentageChange); } else { window.cancelAnimationFrame(timer); }; }; const clickHander = () => { if (!start) { start = true; percentageChange(); }; }; btn.addEventListener('click', clickHander); </script> 这种方法的核心就是以当前盒子为容器,以 进阶版 — input type="range"
源码如下: <style> .progress2[type='range'] { display: block; font: inherit; height: 20px; width: 300px; pointer-events: none; background-color: linear-gradient(to right, #2376b7 100%, #FFF 0%); } .progress2[type='range'], .progress2[type='range']::-webkit-slider-thumb { -webkit-appearance: none; }; .progress2[type='range']::-webkit-slider-runnable-track { border: none; border-bottom-right-radius: 10px; border-top-right-radius: 10px; height: 20px; width: 300px; } .btn { margin-top: 30px; } </style> <input id="progress2" class="progress2" type='range' step="1" min="0" max="100" value="0"/> <button id="btn" class="btn">点我一下嘛~</button> <script> 'use strict'; let startTimestamp = (new Date()).getTime(); let currentPercentage = 0; let maxPercentage = 100; let countDelay = 100; let timer = null; let start = false; let percentageGap = 10; const percentageChange = () => { const currentTimestamp = (new Date()).getTime(); if (currentTimestamp - startTimestamp >= countDelay) { currentPercentage++; startTimestamp = (new Date()).getTime(); progress2.value = currentPercentage; progress2.style.background = `linear-gradient(to right, #2376b7 ${currentPercentage}%, #FFF 0%`; }; if (currentPercentage < maxPercentage) { timer = window.requestAnimationFrame(percentageChange); } else { window.cancelAnimationFrame(timer); }; }; const clickHander = () => { if (!start) { start = true; percentageChange(); }; }; btn.addEventListener('click', clickHander); </script> 写完这个 demo 才发现, 另一个是因为 range 有专属语意 —— 范围,所以它更适合做下面这种事: 以上demo来自:https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/range 高级版 — progress 鸭当然,上述两种方式都是模拟进度条,实际上我们并不需要模拟,因为 whatwg 有为我们提供原生的进度条标签 —— 我们先看效果: 实现如下: <style> .progress3 { height: 20px; width: 300px; -webkit-appearance: none; display: block; } .progress3::-webkit-progress-value { background: linear-gradient( -45deg, transparent 33%, rgba(0, 0, 0, .1) 33%, rgba(0,0, 0, .1) 66%, transparent 66% ), linear-gradient( to top, rgba(255, 255, 255, .25), rgba(0, 0, 0, .25) ), linear-gradient( to left, #09c, #f44); border-radius: 2px; background-size: 35px 20px, 100% 100%, 100% 100%; } .btn { margin-top: 30px; } </style>
虽然有原生的进度条标签,但是规范里并没有规定它的具体表现,所以各个浏览器厂商完全可以按照自己的喜好去定制,样式完全不可控,所以标签虽好。。可用性却不强,有点可惜。 终极版 — meter 赛高当然,能够实现进度条功能的标签,除了上面所说的,还有 代码如下: <style> .progress4 { display: block; font: inherit; height: 50px; width: 300px; pointer-events: none; } .btn { margin-top: 30px; } </style> <meter id="progress4" class="progress4" low="60" high="80" min="0" max="100" value="0"></meter> <button id="btn" class="btn">点我一下嘛~</button> <script> 'use strict'; let startTimestamp = (new Date()).getTime(); let currentPercentage = 0; let maxPercentage = 100; let countDelay = 100; let timer = null; let start = false; const percentageChange = () => { const currentTimestamp = (new Date()).getTime(); if (currentTimestamp - startTimestamp >= countDelay) { currentPercentage++; startTimestamp = (new Date()).getTime(); progress4.value = currentPercentage; }; if (currentPercentage < maxPercentage) { timer = window.requestAnimationFrame(percentageChange); } else { window.cancelAnimationFrame(timer); }; }; const clickHander = () => { if (!start) { start = true; percentageChange(); }; }; btn.addEventListener('click', clickHander); </script> 这个标签可能比较陌生,实际上它跟 总结本文测评了4种实现进度条的方式,得出的结论就是 —— 嗯,万能的 该文章在 2023/8/24 22:48:21 编辑过 |
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