多个下载按钮动画效果(附源代码)
这是一组具有动画效果的下载操作按钮。这个交互效果不仅提供了不错的用户反馈，还通过平滑的动画增强了用户体验。实现中巧妙地利用了SVG和CSS动画，使得按钮既美观又具有高度的可定制性。
主要效果和实现原理如下：
视觉效果：
多种样式的下载按钮（普通、深色、白色、单独图标等）
点击按钮后显示下载进度动画
下载完成后显示勾选图标
主要实现原理：
使用事件监听器处理按钮点击
动态生成和更新SVG路径
使用Proxy对象监控和更新SVG路径的属性
使用CSS变量定义不同主题的颜色
大量使用CSS动画（@keyframes）实现状态转换效果
使用flexbox进行布局
CSS样式
JavaScript功能
动画实现：
文本滑动：使用CSS transform实现文本上下滑动
进度条：通过改变SVG路径实现
勾选图标：使用SVG stroke-dasharray和stroke-dashoffset属性创建绘制动画
交互性：
点击按钮触发下载动画
动画完成后显示勾选图标
可定制性：
使用CSS变量允许轻松更改颜色主题
JavaScript中的duration变量控制动画持续时间
使用方式
复制源代码到空白的html格式文件，在浏览中打开运行即可。
源代码
可上下滑动查看完整源代码：
<!DOCTYPE html>
<html lang="en">
<head>
<style>
.button.dark-single {
--background: none;
--rectangle: #242836;
--success: #4BC793;
}
.button.white-single {
--background: none;
--rectangle: #F5F9FF;
--arrow: #275efe;
--success: #275efe;
--shadow: rgba(10, 22, 50, .1);
}
.button.dark {
--background: #242836;
--rectangle: #1C212E;
--arrow: #F5F9FF;
--text: #F5F9FF;
--success: #2F3545;
}
.button {
--background: #275efe;
--rectangle: #184fee;
--success: #4672f1;
--text: #fff;
--arrow: #fff;
--checkmark: #fff;
--shadow: rgba(10, 22, 50, .24);
display: flex;
overflow: hidden;
text-decoration: none;
-webkit-mask-image: -webkit-radial-gradient(white, black);
background: var(--background);
border-radius: 8px;
box-shadow: 0 2px 8px -1px var(--shadow);
transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.button:active {
transform: scale(0.95);
box-shadow: 0 1px 4px -1px var(--shadow);
}
.button ul {
margin: 0;
padding: 16px 40px;
list-style: none;
text-align: center;
position: relative;
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
font-size: 16px;
font-weight: 500;
line-height: 28px;
color: var(--text);
}
.button ul li:not(:first-child) {
top: 16px;
left: 0;
right: 0;
position: absolute;
}
.button ul li:nth-child(2) {
top: 76px;
}
.button ul li:nth-child(3) {
top: 136px;
}
.button > div {
position: relative;
width: 60px;
height: 60px;
background: var(--rectangle);
}
.button > div:before, .button > div:after {
content: "";
display: block;
position: absolute;
}
.button > div:before {
border-radius: 1px;
width: 2px;
top: 50%;
left: 50%;
height: 17px;
margin: -9px 0 0 -1px;
background: var(--arrow);
}
.button > div:after {
width: 60px;
height: 60px;
transform-origin: 50% 0;
border-radius: 0 0 80% 80%;
background: var(--success);
top: 0;
left: 0;
transform: scaleY(0);
}
.button > div svg {
display: block;
position: absolute;
width: 20px;
height: 20px;
left: 50%;
top: 50%;
margin: -9px 0 0 -10px;
fill: none;
z-index: 1;
stroke-width: 2px;
stroke: var(--arrow);
stroke-linecap: round;
stroke-linejoin: round;
}
.button.loading ul {
-webkit-animation: text calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
animation: text calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
}
.button.loading > div:before {
-webkit-animation: line calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
animation: line calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
}
.button.loading > div:after {
-webkit-animation: background calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
animation: background calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
}
.button.loading > div svg {
-webkit-animation: svg calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
animation: svg calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
}
@-webkit-keyframes text {
10%, 85% {
transform: translateY(-100%);
}
95%, 100% {
transform: translateY(-200%);
}
}
@keyframes text {
10%, 85% {
transform: translateY(-100%);
}
95%, 100% {
transform: translateY(-200%);
}
}
@-webkit-keyframes line {
5%, 10% {
transform: translateY(-30px);
}
40% {
transform: translateY(-20px);
}
65% {
transform: translateY(0);
}
75%, 100% {
transform: translateY(30px);
}
}
@keyframes line {
5%, 10% {
transform: translateY(-30px);
}
40% {
transform: translateY(-20px);
}
65% {
transform: translateY(0);
}
75%, 100% {
transform: translateY(30px);
}
}
@-webkit-keyframes svg {
0%, 20% {
stroke-dasharray: 0;
stroke-dashoffset: 0;
}
21%, 89% {
stroke-dasharray: 26px;
stroke-dashoffset: 26px;
stroke-width: 3px;
margin: -10px 0 0 -10px;
stroke: var(--checkmark);
}
100% {
stroke-dasharray: 26px;
stroke-dashoffset: 0;
margin: -10px 0 0 -10px;
stroke: var(--checkmark);
}
12% {
opacity: 1;
}
20%, 89% {
opacity: 0;
}
90%, 100% {
opacity: 1;
}
}
@keyframes svg {
0%, 20% {
stroke-dasharray: 0;
stroke-dashoffset: 0;
}
21%, 89% {
stroke-dasharray: 26px;
stroke-dashoffset: 26px;
stroke-width: 3px;
margin: -10px 0 0 -10px;
stroke: var(--checkmark);
}
100% {
stroke-dasharray: 26px;
stroke-dashoffset: 0;
margin: -10px 0 0 -10px;
stroke: var(--checkmark);
}
12% {
opacity: 1;
}
20%, 89% {
opacity: 0;
}
90%, 100% {
opacity: 1;
}
}
@-webkit-keyframes background {
10% {
transform: scaleY(0);
}
40% {
transform: scaleY(0.15);
}
65% {
transform: scaleY(0.5);
border-radius: 0 0 50% 50%;
}
75% {
border-radius: 0 0 50% 50%;
}
90%, 100% {
border-radius: 0;
}
75%, 100% {
transform: scaleY(1);
}
}
@keyframes background {
10% {
transform: scaleY(0);
}
40% {
transform: scaleY(0.15);
}
65% {
transform: scaleY(0.5);
border-radius: 0 0 50% 50%;
}
75% {
border-radius: 0 0 50% 50%;
}
90%, 100% {
border-radius: 0;
}
75%, 100% {
transform: scaleY(1);
}
}
html {
box-sizing: border-box;
-webkit-font-smoothing: antialiased;
}
* {
box-sizing: inherit;
}
*:before, *:after {
box-sizing: inherit;
}
body {
min-height: 100vh;
display: flex;
font-family: "Roboto", Arial;
justify-content: center;
align-items: center;
background: #E4ECFA;
}
body .container {
display: flex;
flex-wrap: wrap;
justify-content: center;
}
body .container > div {
flex-basis: 100%;
width: 0;
}
body .container .button {
margin: 16px;
}
@media (max-width: 400px) {
body .container .button {
margin: 12px;
}
}
body .dribbble {
position: fixed;
display: block;
right: 20px;
bottom: 20px;
}
body .dribbble img {
display: block;
height: 28px;
}
</style>
</head>
<body>
<div class="container">
<a href="" class="button">
<ul>
<li>下载</li>
<li>下载中</li>
<li>打开文件</li>
</ul>
<div>
<svg viewBox="0 0 24 24"></svg>
</div>
</a>
<a href="" class="button dark-single">
<div>
<svg viewBox="0 0 24 24"></svg>
</div>
</a>
<div></div>
<a href="" class="button white-single">
<div>
<svg viewBox="0 0 24 24"></svg>
</div>
</a>
<a href="" class="button dark">
<ul>
<li>下载</li>
<li>下载中</li>
<li>打开文件</li>
</ul>
<div>
<svg viewBox="0 0 24 24"></svg>
</div>
</a>
</div>
</body>
<script>
document.querySelectorAll('.button').forEach(button => {
let duration = 3000,
svg = button.querySelector('svg'),
svgPath = new Proxy({
y: null,
smoothing: null
}, {
set(target, key, value) {
target = value;
if(target.y !== null && target.smoothing !== null) {
svg.innerHTML = getPath(target.y, target.smoothing, null);
}
return true;
},
get(target, key) {
return target;
}
});
button.style.setProperty('--duration', duration);
svgPath.y = 20;
svgPath.smoothing = 0;
button.addEventListener('click', e => {
e.preventDefault();
if(!button.classList.contains('loading')) {
button.classList.add('loading');
setTimeout(() => {
svg.innerHTML = getPath(0, 0, [
,
,
]);
}, duration / 2);
}
});
});
function getPoint(point, i, a, smoothing) {
let cp = (current, previous, next, reverse) => {
let p = previous || current,
n = next || current,
o = {
length: Math.sqrt(Math.pow(n - p, 2) + Math.pow(n - p, 2)),
angle: Math.atan2(n - p, n - p)
},
angle = o.angle + (reverse ? Math.PI : 0),
length = o.length * smoothing;
return + Math.cos(angle) * length, current + Math.sin(angle) * length];
},
cps = cp(a, a, point, false),
cpe = cp(point, a, a, true);
return `C ${cps},${cps} ${cpe},${cpe} ${point},${point}`;
}
function getPath(update, smoothing, pointsNew) {
let points = pointsNew ? pointsNew : [
,
,
],
d = points.reduce((acc, point, i, a) => i === 0 ? `M ${point},${point}` : `${acc} ${getPoint(point, i, a, smoothing)}`, '');
return `<path d="${d}" />`;
}
</script>
</html>
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