HTML + CSS 实现一个酷炫的夜间模式切换动画

实现原理

背景切换：一个白天的背景，再加一个黑夜的背景。黑色背景的堆叠顺序高于白色背景。当场景由白天转为黑夜时，黑色背景由透明逐渐转换为不透明，形成昼夜更替的效果。

日月变换：“太阳”和“月亮”其实是同一个元素，昼夜更替时将它所处的 div 盒子使用 transform 旋转 360°，看上去就是太阳落下然后月亮升起来了……

* 该动效的实现方式及配色来自 codepen 上的一个示例，我将其进行了修改和精简。

动画演示


HTML + CSS 实现一个酷炫的夜间模式切换动画昼夜切换动画
代码示例
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0">
<meta name="author" content="mengkun">
<title>昼夜切换动画</title>
<style>
html, body {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
}
/* 白天和黑夜的背景 */
.mk-dark-mode-sky,
.mk-dark-mode-sky:before {
content: "";
position: fixed;
left: 0;
right: 0;
top: 0;
bottom: 0;
z-index: 999999999;
transition: 2s ease all;
}
.mk-dark-mode-sky {
background: linear-gradient(#feb8b0, #fef9db);
}
.mk-dark-mode-sky:before {
opacity: 0;
background: linear-gradient(#4c3f6d, #6c62bb, #93b1ed);
}
.mk-dark-mode .mk-dark-mode-sky:before {
opacity: 1;
}
/* 太阳和月亮 */
.mk-dark-mode-planet {
z-index: 1999999999;
position: fixed;
left: -50%;
top: -50%;
width: 200%;
height: 200%;
transform-origin: center bottom;
transition: 2s cubic-bezier(.7, 0, 0, 1) all;
}
.mk-dark-mode-planet:after {
position: absolute;
left: 35%;
top: 40%;
width: 150px;
height: 150px;
border-radius: 50%;
content: "";
background: linear-gradient(#fefefe, #fffbe8);
}
</style>
<script src="https://cdn.jsdelivr.net/npm/jquery@3.2.1/dist/jquery.min.js"></script>
</head>
<body>
<div class="mk-dark-mode-sky">
<div class="mk-dark-mode-planet"></div>
</div>
<script>
/* 这里为了方便演示，点击页面中任意位置即可触发切换动画 */
$("body").click(function() {
$("body").toggleClass("mk-dark-mode");
var angle = $('.mk-dark-mode-planet').data('angle') + 360 || 360;
$('.mk-dark-mode-planet').css({'transform': 'rotate(' + angle + 'deg)' });
$('.mk-dark-mode-planet').data('angle', angle);
});
</script>
</body>
</html>
HTML + CSS 实现一个酷炫的夜间模式切换动画昼夜切换动画
代码示例
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0">
<meta name="author" content="mengkun">
<title>昼夜切换动画</title>
<style>
html, body {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
}

/* 白天和黑夜的背景 */
.mk-dark-mode-sky,
.mk-dark-mode-sky:before {
content: "";
position: fixed;
left: 0;
right: 0;
top: 0;
bottom: 0;
z-index: 999999999;
transition: 2s ease all;
}
.mk-dark-mode-sky {
background: linear-gradient(#feb8b0, #fef9db);
}
.mk-dark-mode-sky:before {
opacity: 0;
background: linear-gradient(#4c3f6d, #6c62bb, #93b1ed);
}
.mk-dark-mode .mk-dark-mode-sky:before {
opacity: 1;
}

/* 太阳和月亮 */
.mk-dark-mode-planet {
z-index: 1999999999;
position: fixed;
left: -50%;
top: -50%;
width: 200%;
height: 200%;
transform-origin: center bottom;
transition: 2s cubic-bezier(.7, 0, 0, 1) all;
}
.mk-dark-mode-planet:after {
position: absolute;
left: 35%;
top: 40%;
width: 150px;
height: 150px;
border-radius: 50%;
content: "";
background: linear-gradient(#fefefe, #fffbe8);
}
</style>
<script src="https://cdn.jsdelivr.net/npm/jquery@3.2.1/dist/jquery.min.js"></script>
</head>
<body>
<div class="mk-dark-mode-sky">
<div class="mk-dark-mode-planet"></div>
</div>
<script>
/* 这里为了方便演示，点击页面中任意位置即可触发切换动画 */
$("body").click(function() {
$("body").toggleClass("mk-dark-mode");

var angle = $('.mk-dark-mode-planet').data('angle') + 360 || 360;
$('.mk-dark-mode-planet').css({'transform': 'rotate(' + angle + 'deg)' });
$('.mk-dark-mode-planet').data('angle', angle);
});
</script>
</body>
</html>
HTML + CSS 实现一个酷炫的夜间模式切换动画昼夜切换动画
代码示例
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0">
<meta name="author" content="mengkun">
<title>昼夜切换动画</title>
<style>
html, body {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
}

/* 白天和黑夜的背景 */
.mk-dark-mode-sky,
.mk-dark-mode-sky:before {
content: "";
position: fixed;
left: 0;
right: 0;
top: 0;
bottom: 0;
z-index: 999999999;
transition: 2s ease all;
}
.mk-dark-mode-sky {
background: linear-gradient(#feb8b0, #fef9db);
}
.mk-dark-mode-sky:before {
opacity: 0;
background: linear-gradient(#4c3f6d, #6c62bb, #93b1ed);
}
.mk-dark-mode .mk-dark-mode-sky:before {
opacity: 1;
}

/* 太阳和月亮 */
.mk-dark-mode-planet {
z-index: 1999999999;
position: fixed;
left: -50%;
top: -50%;
width: 200%;
height: 200%;
transform-origin: center bottom;
transition: 2s cubic-bezier(.7, 0, 0, 1) all;
}
.mk-dark-mode-planet:after {
position: absolute;
left: 35%;
top: 40%;
width: 150px;
height: 150px;
border-radius: 50%;
content: "";
background: linear-gradient(#fefefe, #fffbe8);
}
</style>
<script src="https://cdn.jsdelivr.net/npm/jquery@3.2.1/dist/jquery.min.js"></script>
</head>
<body>
<div class="mk-dark-mode-sky">
<div class="mk-dark-mode-planet"></div>
</div>
<script>
/* 这里为了方便演示，点击页面中任意位置即可触发切换动画 */
$("body").click(function() {
$("body").toggleClass("mk-dark-mode");

var angle = $('.mk-dark-mode-planet').data('angle') + 360 || 360;
$('.mk-dark-mode-planet').css({'transform': 'rotate(' + angle + 'deg)' });
$('.mk-dark-mode-planet').data('angle', angle);
});
</script>
</body>
</html>