放上这个代码后进入网站会先跳转到这个公告页面，要慎用.....
1.创建一个a.js将以下js代码放入：
function setCookie(name, value, days) {
let date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000)); // 1天有效
document.cookie = name + "=" + encodeURIComponent(value) + "; expires=" + date.toUTCString() + "; path=/";
}
function getCookie(name) {
let cookies = document.cookie.split('; ');
for (let i = 0; i < cookies.length; i++) {
let cookiePair = cookies[i].split('=');
if (cookiePair[0] === name) return decodeURIComponent(cookiePair[1]);
}
return null;
}
function saveReferrer() {
let referrer = document.referrer;
if (referrer && referrer.indexOf(window.location.origin) !== -1) {
localStorage.setItem("sourcePage", referrer);
}
}
document.addEventListener("DOMContentLoaded", function () {
saveReferrer();
if (!getCookie("jumpedToday")) {
setCookie("jumpedToday", "true", 1); // 设置 1 天有效
window.location.href = "/b.html"; // 替换成你的公告页面
}
});
2.创建一个b.html将以下代码放入（文件名称如果更改需要在a.js里更改文件名称）；
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>公告页面</title>
<style>
body {
text-align: center;
font-family: Arial, sans-serif;
margin-top: 50px;
}
.container {
max-width: 600px;
margin: 0 auto;
padding: 20px;
border: 1px solid #ddd;
border-radius: 10px;
box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}
h1 {
color: #ff6600;
}
.btn {
display: block;
width: 100%;
padding: 10px;
margin: 10px 0;
font-size: 16px;
text-decoration: none;
color: white;
background-color: #007bff;
border: none;
border-radius: 5px;
cursor: pointer;
}
.btn:hover {
opacity: 0.8;
}
.btn.secondary {
background-color: #28a745;
}
.btn.third {
background-color: #ff6600;
}
</style>
</head>
<body>
<div class="container">
<h1>重要通知</h1>
<p>本页面一天弹出一次</p>
<button class="btn" onclick="goToNewDomain1()">发布页 1</button>
<button class="btn secondary" onclick="goToNewDomain2()">发布页 2</button>
<button class="btn third" onclick="goToNewDomain3()">发布页 3</button>
<hr>
<button class="btn secondary" onclick="goBack()">返回来源页面</button>
</div>
<script>
// 页面加载时保存来源页面 URL
window.onload = function() {
const referrer = document.referrer;
if (referrer && referrer !== window.location.href) {
localStorage.setItem("sourcePage", referrer);
}
};
function goToNewDomain1() {
window.location.href = "https://baidu.com"; // 替换为你的新域名1
}
function goToNewDomain2() {
window.location.href = "https://baidu.com"; // 替换为你的新域名2
}
function goToNewDomain3() {
window.location.href = "https://baidu.com"; // 替换为你的新域名3
}
function goBack() {
const sourcePage = localStorage.getItem("sourcePage") || document.referrer;
if (sourcePage && sourcePage !== window.location.href) {
window.location.href = sourcePage;
} else {
window.location.href = "/";
}
}
</script>
</body>
</html>
3.调用代码；<script src="/a.js"></script> 放在需要跳转的html页面
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