效果图：
代码：
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
*,
*:before,
*:after {
box-sizing: border-box;
outline: none;
}
body {
background: #020438;
font: 14px/1 'Open Sans', helvetica, sans-serif;
}
.box {
height: 280px;
width: 280px;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: #020438;
border-radius: 100%;
overflow: hidden;
}
.box .percent {
position: absolute;
left: 0;
top: 0;
z-index: 3;
width: 100%;
height: 100%;
display: -webkit-box;
display: -ms-flexbox;
display: flex;
display: -webkit-flex;
align-items: center;
justify-content: center;
color: #fff;
font-size: 64px;
}
.box .water {
position: absolute;
left: 0;
top: 0;
z-index: 2;
width: 100%;
height: 100%;
transform: translate(0, 100%);
background: #4d6de3;
}
.box .water_wave {
width: 200%;
position: absolute;
bottom: 100%;
}
.box .water_wave_back {
right: 0;
fill: #c7eeff;
animation: left 2s infinite linear;
}
@keyframes left {
100% {
transform: translateX(50%);
}
}
.box .water_wave_front {
left: 0;
fill: #4d6de3;
margin-bottom: -1px;
animation: right infinite 1s linear;
}
@keyframes right {
100% {
transform: translateX(-50%);
}
}
</style>
</head>
<body>
<div class="water-ball">
<svg
version="1.1"
xmlns="https://www.w3.org/2000/svg"
xmlns:xlink="https://www.w3.org/1999/xlink"
x="0px"
y="0px"
style="display: none"
>
<symbol id="wave">
<path
d="M420,20c21.5-0.4,38.8-2.5,51.1-4.5c13.4-2.2,26.5-5.2,27.3-5.4C514,6.5,518,4.7,528.5,2.7c7.1-1.3,17.9-2.8,31.5-2.7c0,0,0,0,0,0v20H420z"
></path>
<path
d="M420,20c-21.5-0.4-38.8-2.5-51.1-4.5c-13.4-2.2-26.5-5.2-27.3-5.4C326,6.5,322,4.7,311.5,2.7C304.3,1.4,293.6-0.1,280,0c0,0,0,0,0,0v20H420z"
></path>
<path
d="M140,20c21.5-0.4,38.8-2.5,51.1-4.5c13.4-2.2,26.5-5.2,27.3-5.4C234,6.5,238,4.7,248.5,2.7c7.1-1.3,17.9-2.8,31.5-2.7c0,0,0,0,0,0v20H140z"
></path>
<path
d="M140,20c-21.5-0.4-38.8-2.5-51.1-4.5c-13.4-2.2-26.5-5.2-27.3-5.4C46,6.5,42,4.7,31.5,2.7C24.3,1.4,13.6-0.1,0,0c0,0,0,0,0,0l0,20H140z"
></path>
</symbol>
</svg>
<div class="box">
<div class="percent">
<div class="percentNum" id="count">0</div>
<div class="percentB">%</div>
</div>
<div id="water" class="water">
<!-- <svg viewBox="0 0 560 20" class="water_wave water_wave_back">
<use xlink:href="#wave"></use>
</svg> -->
<svg viewBox="0 0 560 20" class="water_wave water_wave_front">
<use xlink:href="#wave"></use>
</svg>
</div>
</div>
</div>
<script>
window.onload = () => {
const waterEl = document.querySelector('.water')
const numEl = document.querySelector('#count')
let num = 100
let timer = null
timer = setInterval(() => {
if (num === 30) {
clearInterval(timer)
}
waterEl.style.transform = `translate(0,${num}%)`
numEl.innerHTML = 100 - num
num--
}, 20)
}
</script>
</body>
</html>
