今天练习一个页面内容加载时，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：
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>【每日一练】41—网站页面内容占位加载动画效果的实现</title>
</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=”script.js”></script>
</body>
</html>
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;
}
}
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, 2500)
function getData() {
header.innerHTML =
‘<img src=”images/02.png” alt=”” />’
title.innerHTML = ‘web前端开发公众平台’
excerpt.innerHTML =
‘一个专注web前端开发技术学习与研究的平台，网址:www.webqdkf.com’
profile_img.innerHTML =
‘<img src=”images/01.png” alt=”” />’
name.innerHTML = ‘web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’))
}
写在最后
以上就是我们今天【每日一练】的全部内容，希望今天练习项目对你有用，如果你觉得有帮助的话，请点赞我，关注我，并将它分享给你身边做开发的朋友，也许能够帮助到他。
我是杨小爱，我们明天见。
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