js+css实现带时钟显示时间的城市昼夜交替过渡动画效果代码-html代码-BFW代码库

js+css实现带时钟显示时间的城市昼夜交替过渡动画效果代码

代码语言：html

所属分类：其他

代码描述：js+css实现带时钟显示时间的城市昼夜交替过渡动画效果代码，原理就是通过css调节照片的color、brightness、hue-rotate、opacity实现效果。

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">
  


  
  
  
<style>
:root {
  --filter-brightness: 2.4;
  --filter-contrast: 1.1;
  --filter-hue-rotate: 168deg;
  --filter-opacity: 1;
  --color: #111;
}

.ImageContainer img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100vw;
  height: 100vh;
  object-fit: cover;
}

.ImageContainer::after {
  content: "";
  position: absolute;
  inset: 0;
  backdrop-filter: brightness(var(--filter-brightness)) contrast(var(--filter-contrast)) hue-rotate(var(--filter-hue-rotate));
  opacity: var(--filter-opacity);
  transition: opacity 2.5s linear;
}

/* other styles */

#Clock {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90vw;
  color: var(--color);
  text-align: center;
  font-size: 3rem;
  font-weight: 700;
  text-shadow: 0 0 5px #fff;
  transition: color 2.5s;
}

label {
  display: inline-block;
  vertical-align: middle;
  position: relative;
  z-index: 1;
  padding: 20px;
  cursor: pointer;
  color: var(--color);
  font-size: 1.7rem;
  transition: 2.5s;
}

input {
  display: inline-block;
  vertical-align: middle;
  position: relative;
  z-index: 1;
  cursor: pointer;
  margin-left: 20px;
  width: 30px;
  height: 30px;
}

body {
  margin: 0;
  font-family: "Poppins", sans-serif;
}

* {
  box-sizing: border-box;
}
</style>


  
</head>

<body translate="no">
  <main>
  <input id="NightToggle" type="checkbox" /> 
  <label for="NightToggle">Toggle night</label>
  <div class="ImageContainer">
    <img src="//repo.bfw.wiki/bfwrepo/image/64dc5ff1b6290.jpeg" />
  </div>
  <span id="Clock"></span>
</main>
  
      <script >

const r = document.querySelector(':root');
const clockElement = document.getElementById('Clock');
const nightToggleElement = document.getElementById('NightToggle');

/* When checkbow is clicked */
nightToggleElement.addEventListener('change', () => {
  const isChecked = nightToggleElement.checked;
  const colorValue = isChecked ? "#eee" : "#111";
  const brightnessValue = isChecked ? "0.5" : "2.4";
  const hueRotateValue = isChecked ? "179deg" : "168deg";

  /* Update CSS variables (immediately .........完整代码请登录后点击上方下载按钮下载查看