<!DOCTYPE html> <html lang="en"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta http-equiv="Cache-control" content="max-age=1700"> <meta name="viewport" content="user-scalable=no, width=device-width"> <meta name="MobileOptimized" content="320"> <meta name="format-detection" content="telephone=no"> <head> <meta charset="UTF-8"> <title>网络重试加载JS</title> <script> function checkNetwork() { if (navigator.onLine) { // 网络正常，尝试加载指定链接 window.location.href = 'https://lan998.com/3g/'; } else { // 网络断开，设置定时器重试 console.log('网络断开，正在尝试重新加载...'); setTimeout(function() { var script = document.createElement('script'); script.src = 'your-js-file.js'; script.onerror = function() { // 如果JS文件加载失败，继续重试 checkNetwork(); }; document.body.appendChild(script); }, 5000); // 5秒后重试 } } // 页面加载完成后开始检查网络状态 window.onload = checkNetwork; // 监听网络状态变化 window.addEventListener('online', checkNetwork); window.addEventListener('offline', checkNetwork); </script> <style> .centered-text { display: flex; margin-top: 100px; /* 设置图片距离顶部50像素 */ justify-content: center; /* 水平居中 */ } </style> <style> body { background-image: url('img/720.jpg'); background-size: cover; background-position: center; background-repeat: no-repeat; background-attachment: fixed; } </style> <style> .loader { border: 4px solid rgba(0, 0, 0, 0.1); /* Light grey background */ border-top: 4px solid #3498db; /* Blue border */ border-radius: 50%; /* Circular shape */ width: 20px; height: 20px; animation: spin 2s linear infinite; } @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } } </style> <style> .centext { display: flex; align-items: center; /* 垂直居中 */ justify-content: center; /* 水平居中 */ height: 60vh; /* 使容器高度为视口高度 */ } </style> </head> <body> <div class="centered-text"> 您现在处于离线状态,<br>请检查您的网络连接！ </div> <div class="centext"> <div id="loading" class="loader"></div> </div> <script> // 显示等待圆圈 function showLoading() { var loadingDiv = document.getElementById('loading'); loadingDiv.style.display = 'block'; } // 隐藏等待圆圈 function hideLoading() { var loadingDiv = document.getElementById('loading'); loadingDiv.style.display = 'none'; } // 用法 // showLoading(); // 当需要等待时显示圆圈 // hideLoading(); // 当处理完毕时隐藏圆圈 </script> </body> </html>  顶端  底部
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