css 网站页面内容占位加载动画效果的实现

拼搏现实的明天。 2023-10-07 20:15 2阅读 0赞

#### 阅读目录 ####

*  阐述
 *   *  index.html
     *  index.js
     *  index.css

## 阐述 ##

内容占位动画效果，这个也是我们经常在一些网站上看到的效果，这种效果的设计，可以提升用户体验，降低用户等待焦虑的情绪。

下面我们一起来看看一下今天练习的最终效果：

![在这里插入图片描述][0c3c8bff59a240bfa6abb97a23fbe7f4.gif_pic_center]

### index.html ###

<!DOCTYPE html>
    <html lang="zh">
    <head>
    	<meta charset="UTF-8" />
    	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
    	<link rel="stylesheet" href="style.css" />
    	<title>网站页面内容占位加载动画效果的实现</title>
    	<link rel="stylesheet" href="./index.css">
    </head>
    <body>
    	
    <div class="card">
    	<div class="card-header animated-bg" id="header"> </div>
    
    	<div class="card-content">
    		<h3 class="card-title animated-bg animated-bg-text" id="title">
    			 
    		</h3>
    		<p class="card-excerpt" id="excerpt">
    			 
    			<span class="animated-bg animated-bg-text"> </span>
    			<span class="animated-bg animated-bg-text"> </span>
    			<span class="animated-bg animated-bg-text"> </span>
    		</p>
    		<div class="author">
    			<div class="profile-img animated-bg" id="profile_img"> </div>
    			<div class="author-info">
    				<strong class="animated-bg animated-bg-text" id="name"> </strong>
    				<small class="animated-bg animated-bg-text" id="date"> </small>
    			</div>
    		</div>
    	</div>
    </div>
    
    <script src="./index.js"></script>
    </body>
    </html>

### index.js ###

const header = document.getElementById('header')
    const title = document.getElementById('title')
    const excerpt = document.getElementById('excerpt')
    const profile_img = document.getElementById('profile_img')
    const name = document.getElementById('name')
    const date = document.getElementById('date')
    
    const animated_bgs = document.querySelectorAll('.animated-bg')
    const animated_bg_texts = document.querySelectorAll('.animated-bg-text')
    
    setTimeout(getData, 1500)
    
    function getData() {
        
    	header.innerHTML =
    		'<img src="images/02.png" alt="" />'
    	title.innerHTML = 'web 前端 css 特效'
    	excerpt.innerHTML =
    		'一个专注web开发技术学习博客 https://wgchen.blog.csdn.net -------- 别站在烦恼里仰望幸福！'
    	profile_img.innerHTML =
    		'<img src="images/01.png"  alt="" />'
    	name.innerHTML = '前端开发'
    	date.innerHTML = '2022年8月9日'
    
    	animated_bgs.forEach((bg) => bg.classList.remove('animated-bg'))
    	animated_bg_texts.forEach((bg) => bg.classList.remove('animated-bg-text'))
    }

### index.css ###

* {
        
      box-sizing: border-box;
    }
    
    body {
        
      background-color: #ecf0f1;
      font-family: 'Roboto', sans-serif;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100vh;
      overflow: hidden;
      margin: 0;
    }
    
    img {
        
      max-width: 100%;
    }
    
    .card {
        
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      border-radius: 10px;
      overflow: hidden;
      width: 350px;
    }
    
    .card-header {
        
      height: 200px;
    }
    
    .card-header img {
        
      object-fit: cover;
      height: 100%;
      width: 100%;
    }
    
    .card-content {
        
      background-color: #fff;
      padding: 30px;
    }
    
    .card-title {
        
      height: 20px;
      margin: 0;
    }
    
    .card-excerpt {
        
      color: #777;
      margin: 10px 0 20px;
    }
    
    .author {
        
      display: flex;
    }
    
    .profile-img {
        
      border-radius: 50%;
      overflow: hidden;
      height: 40px;
      width: 40px;
    }
    
    .author-info {
        
      display: flex;
      flex-direction: column;
      justify-content: space-around;
      margin-left: 10px;
      width: 100px;
    }
    
    .author-info small {
        
      color: #aaa;
      margin-top: 5px;
    }
    
    .animated-bg {
        
      background-image: linear-gradient(
        to right,
        #f6f7f8 0%,
        #edeef1 10%,
        #f6f7f8 20%,
        #f6f7f8 100%
      );
      background-size: 200% 100%;
      animation: bgPos 1s linear infinite;
    }
    
    .animated-bg-text {
        
      border-radius: 50px;
      display: inline-block;
      margin: 0;
      height: 10px;
      width: 100%;
    }
    
    @keyframes bgPos {
        
      0% {
        
        background-position: 50% 0;
      }
    
      100% {
        
        background-position: -150% 0;
      }
    }

[0c3c8bff59a240bfa6abb97a23fbe7f4.gif_pic_center]: https://img-blog.csdnimg.cn/0c3c8bff59a240bfa6abb97a23fbe7f4.gif#pic_center