我正在为我正在处理的个人项目在网页中创建幻灯片,虽然我对 HTML 和 Javascript 了解一些,但我对 CSS 仍然不太熟悉。
就这一点而言,我在这个页面上找到了代码:
https://www.w3docs.com/tools/code-editor/3720
它实现了我想要实现的 95%,这很棒。但是,我想为我的图像添加淡入效果,而不仅仅是让它们在淡出后出现在屏幕上。
有人可以帮我添加正确的代码来实现这一点吗?一旦我看到什么去了哪里,我就可以从那时起弄清楚事情,但正如我所说,我还没有跟上 CSS 的速度以及它到底是如何工作的。
非常感谢!约瑟夫。
第1点:-链接:https://www.w3docs.com/tools/code-editor/3720您提供的是对您的问题的完整解释。但输出是在链接中实现的:https://www.w3docs.com/tools/code-editor/3720只能使用HTML,CSS3和JS!
第2点:-我还希望您阅读您想要实现的所提供链接输出的主要文章https://www.w3docs.com/snippets/css/how-to-create-an-image- slider-or-slideshow.html 通过阅读本文,您将更好地了解如何仅使用 HTM、CSS3 和 JS 实现图像滑块或任何类型的滑块。
第 3 点:- 如果您对此有任何疑问,请随时询问。我很乐意为您提供帮助。
第 4 点:- 下面给出的代码片段选自 https://www.w3docs.com/tools/code-editor/3720 在 CSS3 代码中,从第 84 行到第 105 行的代码块淡出-in code 如果您想在自定义项目中淡入图像,您可以选择该代码块并根据需要使用它 通过提供 “fade” 作为 html 中特定元素/标签的类!
/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
@keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
let slideIndex = 0;
let timeoutId = null;
const slides = document.getElementsByClassName("mySlides");
const dots = document.getElementsByClassName("dot");
showSlides();
function currentSlide(index) {
slideIndex = index;
showSlides();
}
function plusSlides(step) {
if (step < 0) {
slideIndex -= 2;
if (slideIndex < 0) {
slideIndex = slides.length - 1;
}
}
showSlides();
}
function showSlides() {
for (let i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
dots[i].classList.remove('active');
}
slideIndex++;
if (slideIndex > slides.length) {
slideIndex = 1
}
slides[slideIndex - 1].style.display = "block";
dots[slideIndex - 1].classList.add('active');
if (timeoutId) {
clearTimeout(timeoutId);
}
timeoutId = setTimeout(showSlides, 5000); // Change image every 5 seconds
}
* {
box-sizing: border-box
}
body {
font-family: Verdana, sans-serif;
margin: 0
}
.mySlides {
display: none
}
img {
vertical-align: middle;
}
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* Next & previous buttons */
.prev,
.next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -22px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
}
/* Position the "next button" to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
background-color: rgba(0, 0, 0, 0.8);
}
/* Caption text */
.text {
color: #ffffff;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}
/* Number text (1/3 etc) */
.numbertext {
color: #ffffff;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
/* The dots/bullets/indicators */
.dot {
cursor: pointer;
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #999999;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}
.active,
.dot:hover {
background-color: #111111;
}
/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
@keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
.prev,
.next,
.text {
font-size: 11px
}
}
<!DOCTYPE html>
<html>
<head>
<title>Slideshow Images</title>
</head>
<body>
<div class="slideshow-container">
<div class="mySlides fade">
<div class="numbertext">1 / 3</div>
<img src="https://www.w3docs.com/uploads/media/default/0001/03/66cf5094908491e69d8187bcf934050a4800b37f.jpeg" style="width:100%">
<div class="text">London, Ebgland</div>
</div>
<div class="mySlides fade">
<div class="numbertext">2 / 3</div>
<img src="https://www.w3docs.com/uploads/media/default/0001/03/b7d624354d5fa22e38b0ab1f9b905fb08ccc6a05.jpeg" style="width:100%">
<div class="text">Sunset in Romania</div>
</div>
<div class="mySlides fade">
<div class="numbertext">3 / 3</div>
<img src="https://www.w3docs.com/uploads/media/default/0001/03/5bfad15a7fd24d448a48605baf52655a5bbe5a71.jpeg" style="width:100%">
<div class="text">New York, USA</div>
</div>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
</div>
<br>
<div style="text-align:center">
<span class="dot" onclick="currentSlide(0)"></span>
<span class="dot" onclick="currentSlide(1)"></span>
<span class="dot" onclick="currentSlide(2)"></span>
</div>
</body>
</html>