HTML+CSS+JS实现 ❤️夜晚云层动画特效❤️

ゞ浴缸里的玫瑰 2022-09-10 03:14 291阅读 0赞

> ##    效果演示： ##

![20210903205044357.gif][]

基于css3 keyframes 属性制作乌云密布云层动画，夜晚云层飘过动画特效。可用于网页动态云层背景特效。利用animation 和png云图片制作完成。

> ##    代码目录： ##

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAamF2YeadjumYs-WLhw_size_20_color_FFFFFF_t_70_g_se_x_16][]

> ## 主要代码实现： ##

### css样式： ###

html,
    body {
        width: 100%;
        height: 100%;
        overflow: hidden;
    }
    
    body {
        background: #000;
        text-align: center;
    
    @keyframes clouds-loop-1 {
        to {
            background-position: -1000px 0;
        }
    }
    
    .clouds-1 {
        background-image: url("../img/clouds_2.webp");
        animation: clouds-loop-1 20s infinite linear;
    }
    
    @keyframes clouds-loop-2 {
        to {
            background-position: -1000px 0;
        }
    }
    
    .clouds-2 {
        background-image: url("../img/clouds_1.webp");
        animation: clouds-loop-2 15s infinite linear;
    }
    
    @keyframes clouds-loop-3 {
        to {
            background-position: -1579px 0;
        }
    }
    
    .clouds-3 {
        background-image: url("../img/clouds_3.webp");
        animation: clouds-loop-3 17s infinite linear;
    }
    
    html,
    body {
        font-family: sans-serif;
        height: 100%;
        padding: 0;
        margin: 0;
    }
    
    body {
        background: url('data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4gPHN2ZyB2ZXJzaW9uPSIxLjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGRlZnM+PGxpbmVhckdyYWRpZW50IGlkPSJncmFkIiBncmFkaWVudFVuaXRzPSJvYmplY3RCb3VuZGluZ0JveCIgeDE9IjAuNSIgeTE9IjAuMCIgeDI9IjAuNSIgeTI9IjEuMCI+PHN0b3Agb2Zmc2V0PSIwJSIgc3RvcC1jb2xvcj0iIzMzMzMzMyIvPjxzdG9wIG9mZnNldD0iMTAwJSIgc3RvcC1jb2xvcj0iIzAwMDAwMCIvPjwvbGluZWFyR3JhZGllbnQ+PC9kZWZzPjxyZWN0IHg9IjAiIHk9IjAiIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbGw9InVybCgjZ3JhZCkiIC8+PC9zdmc+IA==');
        background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #333333), color-stop(100%, #000000));
        background: -moz-linear-gradient(#333333, #000000);
        background: -webkit-linear-gradient(#333333, #000000);
        background: linear-gradient(#333333, #000000);
    }
    
    body,
    body a {
        color: #cccccc;
    }
    
    h1.quote {
        -moz-transform: translate(-50%, -50%);
        -ms-transform: translate(-50%, -50%);
        -webkit-transform: translate(-50%, -50%);
        transform: translate(-50%, -50%);
        display: inline-block;
        vertical-align: middle;
        *vertical-align: auto;
        *zoom: 1;
        *display: inline;
        text-align: right;
        text-decoration: none;
        font-family: 'Oswald', sans-serif;
        font-weight: normal;
        position: absolute;
        top: 50%;
        left: 50%;
        font-size: 1.5em;
        line-height: 1.5em;
        margin: 0;
        text-shadow: 0 -1px 0 #ffffff, 0 2px 3px #000000;
    }
    
    h1.quote span {
        display: block;
    }
    
    .clouds {
        filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=40);
        opacity: 0.4;
        pointer-events: none;
        position: absolute;
        overflow: hidden;
        top: 0;
        left: 0;
        right: 0;
        height: 100%;
    }
    
    .clouds-1,
    .clouds-2,
    .clouds-3 {
        background-repeat: repeat-x;
        position: absolute;
        top: 0;
        right: 0;
        left: 0;
        height: 500px;
    }
    }
    
    body::before {
        content: "";
        display: inline-block;
        height: 100%;
        vertical-align: middle;
    }
    
    .scene {
        position: relative;
        display: inline-block;
        vertical-align: middle;
        perspective: 15px;
        perspective-origin: 50% 50%;
    }
    
    .wrap {
        position: absolute;
        width: 1000px;
        height: 1000px;
        left: -500px;
        top: -500px;
        transform-style: preserve-3d;
        animation: move 12s infinite linear;
        animation-fill-mode: forwards;
    }
    
    .wrap:nth-child(2) {
        animation: move 12s infinite linear;
        animation-delay: 6s;
    }
    
    .wall {
        width: 100%;
        height: 100%;
        position: absolute;
        background: url(../img/sg.jpg);
        background-size: cover;
        opacity: 0;
        animation: fade 12s infinite linear;
    }
    
    .wrap:nth-child(2) .wall {
        animation-delay: 6s;
    }
    
    .wall-right {
        transform: rotateY(90deg) translateZ(500px);
    }
    
    .wall-left {
        transform: rotateY(-90deg) translateZ(500px);
    }
    
    .wall-top {
        transform: rotateX(90deg) translateZ(500px);
    }
    
    .wall-bottom {
        transform: rotateX(-90deg) translateZ(500px);
    }
    
    .wall-back {
        transform: rotateX(180deg) translateZ(500px);
    }
    
    @keyframes fade {
        0% {
            opacity: 0;
        }
        25% {
            opacity: 1;
        }
        75% {
            opacity: 1;
        }
        100% {
            opacity: 0;
        }
    }
    
    @keyframes move {
        0% {
            transform: translateZ(-500px) rotate(0deg);
        }
        100% {
            transform: translateZ(500px) rotate(0deg);
        }
    }

### html代码 : ###

<!DOCTYPE html>
    <html lang="en">
    
    <head>
        <meta charset="UTF-8">
        <title>What do you have to be scared of?</title>
    
        <link rel="stylesheet" href="css/style.css">
    
        <script src="js/prefixfree.min.js"></script>
    
    </head>
    
    <body>
    
        <h1 class='quote'>
            <span>你是个鬼魂，驾驶着一具用星尘做成的肉骨架。</span>
            <span>... 你害怕什么？</span>
        </h1>
    
    
    
        <div class='clouds'>
            <div class='clouds-1'></div>
            <div class='clouds-2'></div>
            <div class='clouds-3'></div>
        </div>
    
    
    </body>
    
    </html>

需要把JS引入进来、图片也可以替换成自己喜欢的样子。

> ## 源码获取 ##
> 
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> 
> ### [HTML5大作业实战100套][HTML5_100] ###

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![在这里插入图片描述][8e6bebf6b7cd409abc03ca5fcb83f826.gif_pic_center]

[20210903205044357.gif]: /images/20220829/3fe1e1bf3ae84102972798cd97d74457.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAamF2YeadjumYs-WLhw_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/5b5151877c95470b8b4153a78461893a.png
[HTML5_100]: https://blog.csdn.net/weixin_39709134/category_11287267.html
[8e6bebf6b7cd409abc03ca5fcb83f826.gif_pic_center]: /images/20220829/e388a57a4b1b4b34856db4eb1b0f54d8.png