我正在尝试创建一个同时具有两个聚光灯的指南。当我尝试添加另一个聚光灯时，两个聚光灯区域看起来都是阴影。如何避免一个聚光区域的阴影与其他聚光区域重叠？框阴影是为了突出显示所需区域，同时使页面的其他部分看起来像是在其上方有覆盖层。
这是可以尝试的小提琴链接。 https://jsfiddle.net/ad1xzbwy/
只有一盏聚光灯 这是只有一盏聚光灯时的样子。 两个聚光灯 这是有两个聚光灯时的样子。
这是简单示例的代码。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Centered Triangle Text</title>
<style>
body, html {
height: 100%;
margin: 0;
position: relative;
scroll-behavior: smooth;
}
.article {
margin-top: 200px;
height: 500px;
background-color: #f0f0f0;
}
.vertical-timeline {
position: fixed;
top: 50px;
left: 50px;
width: 5px;
background-color: #CC0E19;
z-index: 1;
height: 80px;
z-index: 100;
}
.label {
position: absolute;
left: 5px;
z-index: 2;
cursor: pointer;
}
.label-pentagon {
background-color: #CC0E19;
width: 105px;
height: 30px;
clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 50%, calc(100% - 30px) 100%, 0 100%);
color: white;
display: flex;
align-items: center;
justify-content: flex-start;
padding-left:5px;
font-size: 0.9rem;
}
.label-triangle {
position: absolute;
top: 20px;
left: 5px;
width: 0;
height: 0;
border-top: 10px solid transparent;
border-left: 15px solid #CC0E19;
border-bottom: 10px solid transparent;
}
.triangle-text {
position: absolute;
left: 30px;
top: 20px;
color: #CC0E19;
white-space: nowrap;
font-size: 0.9rem;
display: flex;
align-items: center;
height: 20px;
}
.spotlight-active .overlay {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
/*background: rgba(211, 211, 211, 0.7);*/
z-index: 50; /* Above the content but below the labels */
display: block; /* Show the overlay */
}
.spotlight-active .spotlight.desktop {
position: fixed;
top: 20px;
left: 35px;
width: 130px;
height: 130px;
border-radius: 50%;
z-index: 51; /* Above the overlay */
box-shadow: 0 0 0 10000px rgba(0, 0, 0, 0.7); /* Large shadow with a "cut-out" effect */
display: block; /* Show the spotlight */
background-clip: content-box; /* Ensures the inner background is clipped to the content box */
}
.spotlight-active .spotlight-2.desktop {
position: fixed;
top: 20px;
left: 350px;
width: 130px;
height: 130px;
border-radius: 50%;
z-index: 51; /* Above the overlay */
box-shadow: 0 0 0 10000px rgba(0, 0, 0, 0.7); /* Large shadow with a "cut-out" effect */
display: block; /* Show the spotlight */
background-clip: content-box; /* Ensures the inner background is clipped to the content box */
}
.message-zone {
position: fixed;
top: 150px;
left: 320px;
transform: translateX(-50%);
z-index: 52;
text-align: center;
max-width: 220px;
}
.message-box {
background-color: white;
color: black;
padding: 10px;
border-radius: 5px;
z-index: 52;
text-align: center;
max-width: 220px;
}
.ok-button {
display: block;
margin: 10px auto;
background-color: #CC0E19;
color: white;
border: none;
padding: 5px 20px;
border-radius: 5px;
cursor: pointer;
float: right;
}
.arrow-guide {
position: fixed;
top: 130px;
left: 140px;
z-index: 102;
}
.spotlight-active .spotlight.mobile {
position: fixed;
top: 100px;
left: -20px;
width: 50px;
height: 50px;
border-radius: 50%;
z-index: 51;
box-shadow: 0 0 0 10000px rgba(0, 0, 0, 0.7);
display: block;
background-clip: content-box;
}
.message-zone.mobile {
position: fixed;
top: 150px;
left: 320px;
transform: translateX(-50%);
z-index: 52;
text-align: center;
max-width: 220px;
}
.arrow-guide.mobile {
position: fixed;
top: 130px;
left: 140px;
z-index: 102;
}
.switch-article-overlay {
display: flex;
position: fixed;
left: 0;
top: 110px;
z-index:99999;
}
.switch-article-overlay button.overlay-icon {
background-color: #CC0E19;
color: #fff;
font-size: 3em;
height: 30px;
max-width: none;
width: 0.3em;
border-top-right-radius: 0.1em;
border-bottom-right-radius: 0.1em;
border: 1px solid #636363;
border-left-color: transparent;
border-top-left-radius: 0;
border-bottom-left-radius: 0;
}
button.overlay-icon {
background: 0 0;
border: none;
padding: 0;
-webkit-tap-highlight-color: transparent;
cursor: pointer;
visibility: visible;
display: flex;
justify-content: center;
align-items: center;
}
.switch-article-overlay button.overlay-icon svg {
fill: #fff;
}
</style>
</head>
<body>
<div class="overlay"></div>
<div class="spotlight desktop"></div>
<div class="spotlight-2 desktop"></div>
<div class="vertical-timeline mobile-hidden">
<div class="label" style="top:0px;" onclick="scrollToArticle('article1')">
<div class="label-pentagon">Main News</div>
</div>
<div class="label" style="top:30px;" onclick="scrollToArticle('article2')">
<div class="label-triangle"></div>
<div class="triangle-text">Second News</div>
</div>
</div>
<div class="message-zone">
<div class="message-box">
<div class="message-content">Click to read the next news</div>
</div>
<button class="ok-button" onclick="hideSpotlight()">OK</button>
</div>
<img class="arrow-guide" src="arrow-left-white.png"/>
<div class="switch-article-overlay">
<button class="overlay-icon" title="article switching">
<!--
right arrow
<svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" width="24">
<path d="M0 0h24v24H0V0z" fill="none"></path>
<path d="M15.41 16.59L10.83 12l4.58-4.59L14 6l-6 6 6 6 1.41-1.41z"></path>
</svg>
-->
<svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" width="24">
<path d="M0 0h24v24H0V0z" fill="none"></path>
<path d="M8.59 7.41L13.17 12l-4.58 4.59L10 18l6-6-6-6-1.41 1.41z"></path>
</svg>
</button>
</div>
<div id="article1" class="article">
<h2>Article 1</h2>
</div>
<div id="article2" class="article">
<h2>Article 2</h2>
</div>
<script>
function scrollToArticle(articleId) {
const articleElement = document.getElementById(articleId);
if (articleElement) {
window.scrollTo({
top: articleElement.offsetTop,
behavior: 'smooth'
});
}
}
// Check if it's the user's first visit and apply the spotlight effect if it is
window.addEventListener('load', function() {
if (!localStorage.getItem('hasVisited')) {
document.body.classList.add('spotlight-active');
localStorage.setItem('hasVisited', 'true');
}
//for testing use
document.body.classList.add('spotlight-active');
});
// Optional: Close the spotlight effect on click or after a certain time
document.querySelector('.overlay').addEventListener('click', function() {
document.body.classList.remove('spotlight-active');
hideSpotlight();
});
function hideSpotlight() {
// Hide overlay，spotlight， message box and arrow guide
var overlay = document.querySelector('.overlay');
var spotlight = document.querySelector('.spotlight');
var spotlight2 = document.querySelector('.spotlight-2');
var messageZone = document.querySelector('.message-zone');
var arrowGuide = document.querySelector('.arrow-guide');
overlay.style.display = 'none';
spotlight.style.display = 'none';
spotlight2.style.display = 'none';
messageZone.style.display = 'none';
arrowGuide.style.display = 'none';
}
$(document).ready(function(){
showArticleSwitchWidget();
});
function showArticleSwitchWidget() {
//$(".switch-article-overlay .overlay-label").addClass('hidden');
$(".switch-article-overlay .overlay-icon svg path").attr( "d", "M8.59 16.59L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.41z");
}
function hideArticleSwitchWidget() {
$(".switch-article-overlay .overlay-icon svg path").attr("d","M15.41 16.59L10.83 12l4.58-4.59L14 6l-6 6 6 6 1.41-1.41z");
}
</script>
</body>
</html>
曾尝试寻找答案，但没有找到。尽量保持 box-shadow 属性。
并没有真正使用 box-shadow，但我相信使用以下技术您可以得到几乎相同的结果：
.page {
display: grid;
gap: 6px;
}
.page div {
background-color: lightblue;
}
.spots {
width: 100vw;
height: 100vh;
background-color: silver;
z-index: 10;
position: absolute;
top: 0px;
mix-blend-mode: darken;
}
.spots div {
width: 120px;
height: 120px;
border-radius: 50%;
background-color: white;
position: fixed;
}
#spot1 {
left: 60px;
top: 20px;
}
#spot2 {
left: 150px;
top: 50px;
}<div class="page">
<div>line 1</div>
<div>line 1</div>
<div>line 1</div>
<div>line 1</div>
<div>line 1</div>
<div>line 1</div>
<div>line 1</div>
</div>
<div class="spots">
<div id="spot1"></div>
<div id="spot2"></div>
</div>