css实现充电式loading加载动画

1.实现效果

2.实现原理

div+伪元素实现外边框样式
渐变+伪元素实现内部波浪
动画，实现在一定时间内，内部波浪高度的0到100%

3.实现代码

<div class="box">
    <div class="charge">
        <div class="wave"></div>
    </div>
</div>

.box {
    margin: 20px auto;
    width: 685px;
    height: 250px;
    background: #ccd8d7;
    border-radius: 10px;
    box-shadow: 0px 0px 30px 1px #eff3eb inset;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.charge {
    position: relative;
    width: 100px;
    height: 200px;
    margin: 10px auto;
    background-color: #fff;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    text-shadow: 0px 0px 10px #fff;
}

.charge::after {
    content: '';
    position: absolute;
    top: -15px;
    left: 30px;
    width: 40px;
    height: 15px;
    border-top-left-radius: 10px;
    border-top-right-radius: 10prx;
    background-color: #fff;
}

.wave {
    position: absolute;
    bottom: 0;
    width: 100%;
    background: linear-gradient(#c6f3bd, #79965c, #7b8d82);
    overflow: hidden;
    animation: more 10s linear infinite;
}

@keyframes more {
    0% {
        height: 0%;
    }

    100% {
        height: 100%;
    }
}

.wave::before {
    position: absolute;
    content: '';
    top: -185px;
    left: -50px;
    width: 200px;
    height: 200px;
    border-radius: 45%;
    background-color: #fff;
    animation: move 10s linear infinite;
}

.wave::after {
    position: absolute;
    content: '';
    top: -180px;
    left: -50px;
    width: 200px;
    height: 200px;
    border-radius: 45%;
    background-color: #fff;
    opacity: .5;
    animation: move 8s linear infinite;
}

@keyframes move {
    100% {
        transform: rotate(360deg);
    }
}

4.更多demo，关注苏苏的码云。