因为这是一个相当长的问题 - 感谢那些懒得阅读它的人!我正在做个人博客网站项目,在索引页面中,我想实现幻灯片标题(包含背景图片,标题和将用户重定向到实际psot的按钮)以动态显示特色博客文章。当标题转换为另一个时,我也想要淡入效果。标题的html如下所示:
var slideIndex = 0;
function carousel() {
var i;
var x = document.getElementsByClassName("header-slide");
for (i = 0; i < x.length; i++) {
x[i].style.opacity = 0;
x[i].style.display = "none";
}
slideIndex++;
if (slideIndex > x.length) {
slideIndex = 1;
}
x[slideIndex - 1].style.opacity = 1;
x[slideIndex - 1].style.display = "block";
setTimeout(carousel, 3000);
}
.header-1 {
background-image: linear-gradient(rgba(0, 0, 0, 0.29), #000), url(background-image#1);
background-size: cover;
background-position: center;
background-attachment: fixed;
height: 100vh;
}
.header-2 {
background-image: linear-gradient(rgba(0, 0, 0, 0.29), #000), url(background-image#2);
background-size: cover;
background-position: center;
background-attachment: fixed;
height: 100vh;
}
.header-3 {
background-image: linear-gradient(rgba(0, 0, 0, 0.29), #000), url(background-image#3);
background-size: cover;
background-position: center;
background-attachment: fixed;
height: 100vh;
}
.header-style {
display: none;
transition: opacity .5s ease-in;
}
<div class="slideshow-container">
<div class="header-slide">
<header class="header-1">
<nav>
<div class="row">
<ul class="main-nav">
<li><a href="article_directory.html">Articles</a></li>
<li><a href="http://collegiatecycling.org/accc/">Collegiate Racing</a></li>
<li><a href="photo_gallery.html">Multimedia</a></li>
<li><a href="current_projects.html">Current Porjects</a></li>
<li><a href="get_in_touch.php">Get in touch</a></li>
<li><a href="#first-footer-child">External</a></li>
</ul>
</div>
</nav>
<div class="hero-text-box">
<h1>Article#1</h1>
<a class="btn btn-full" href="#">Read full story</a>
</div>
</header>
</div>
<div class="header-slide">
<header class="header-2">
<nav>
<div class="row">
<ul class="main-nav">
<li><a href="article_directory.html">Articles</a></li>
<li><a href="http://collegiatecycling.org/accc/">Collegiate Racing</a></li>
<li><a href="photo_gallery.html">Multimedia</a></li>
<li><a href="current_projects.html">Current Porjects</a></li>
<li><a href="get_in_touch.php">Get in touch</a></li>
<li><a href="#first-footer-child">External</a></li>
</ul>
</div>
</nav>
<div class="hero-text-box">
<h1>Article#2</h1>
<a class="btn btn-full" href="#">Read more</a>
</div>
</header>
</div>
<div class="header-slide">
<header class="header-3">
<nav>
<div class="row">
<ul class="main-nav">
<li><a href="article_directory.html">Articles</a></li>
<li><a href="http://collegiatecycling.org/accc/">Collegiate Racing</a></li>
<li><a href="photo_gallery.html">Multimedia</a></li>
<li><a href="current_projects.html">Current Porjects</a></li>
<li><a href="get_in_touch.php">Get in touch</a></li>
<li><a href="#first-footer-child">External</a></li>
</ul>
</div>
</nav>
<div class="hero-text-box">
<h1>Article#3</h1>
<a class="btn btn-full" href="#">Read more</a>
</div>
</header>
</div>
</div>
我已经有了以下js脚本,虽然嵌入在html文件中,但是会滑动显示标题,但无法实现淡入效果。
我也想要淡入效果,所以我添加了以下CSS代码。
通过以上所有措施,我的网站标题仍然无法以淡入效果幻灯片放映。我的问题是,似乎设置过渡属性不会改变任何东西,因为标题不透明度由我的js脚本改变(所以每次它从0变为1时,CSS会处理它如何变化)?任何帮助表示赞赏!
答案 0 :(得分:0)
使用css关键帧动画:
#header {
animation: fade 5s ease-out infinite;
}
@keyframes fade {
0% {
opacity: .1
}
100% {
opacity: 1
}
}
<div id="header">
<img src="https://c1.staticflickr.com/5/4016/4543539771_1325623dd6.jpg"></img>
</div>
或者看看浏览器原生动画api:
Web Animations API打开浏览器的动画引擎 开发人员和JavaScript操纵。
此API旨在成为两种CSS实现的基础 动画和CSS过渡,为未来敞开大门 动画效果。
这是在网络上制作动画的最高效的方式之一 支持,让浏览器进行自己的内部优化 没有黑客
https://developer.mozilla.org/en-US/docs/Web/API/Web_Animations_API/Using_the_Web_Animations_API