原生JS版本
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>文字上下无缝轮播</title> </head> <style> * { margin: 0; padding: 0; } #container{ width: 60%; margin: 100px auto; position: relative; height: 200px; overflow: hidden; } #list-wrapper{ position: relative; } ul { list-style: none; background: #f8f8f8; text-align: center; padding: 0 20px; } li{ height: 35px; line-height: 35px; color: #fff; } li:nth-child(odd){ background: #5077aa; } li:nth-child(even){ background: #fb6b06; } </style> <body> <div id="container"> <div id="list-wrapper" style="top: 0"> <ul class="notice-list" id="notice-list"> <li>富强、*、文明、和谐、*1</li> <li>富强、*、文明、和谐、*2</li> <li>富强、*、文明、和谐、*3</li> <li>富强、*、文明、和谐、*4</li> <li>富强、*、文明、和谐、*5</li> <li>富强、*、文明、和谐、*6</li> </ul> <ul class="notice-list" id="notice-list-2"> </ul> </div> </div> <script> var ROLL_SPEED = 100 var noticeList1 = document.getElementById(‘notice-list‘); var noticeList2 = document.getElementById(‘notice-list-2‘); var listWrapper = document.getElementById(‘list-wrapper‘); noticeList2.innerHTML=noticeList1.innerHTML; var timer = setInterval(rollStart, ROLL_SPEED); function rollStart() { if (Math.abs(_subStr(listWrapper.style.top)) >= noticeList1.clientHeight) { listWrapper.style.top = ‘0px‘ } else { var top = listWrapper.style.top listWrapper.style.top = _subStr(top)-1+‘px‘ } } // 截取px前数值 function _subStr(str) { var index = str.indexOf(‘px‘); if (index > -1) { return parseFloat(str.substr(0, index + 1)) } } </script> </body> </html>
jQuery版本
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>文字上下无缝轮播</title> </head> <style> * { margin: 0; padding: 0; } #container{ width: 60%; margin: 100px auto; position: relative; height: 200px; overflow: hidden; } #list-wrapper{ position: relative; top: 0; } ul { list-style: none; background: #f8f8f8; text-align: center; padding: 0 20px; } li{ height: 35px; line-height: 35px; color: #fff; } li:nth-child(odd){ background: #5077aa; } li:nth-child(even){ background: #fb6b06; } </style> <body> <div id="container"> <div id="list-wrapper"> <ul class="notice-list" id="notice-list"> <li>富强、*、文明、和谐、*1</li> <li>富强、*、文明、和谐、*2</li> <li>富强、*、文明、和谐、*3</li> <li>富强、*、文明、和谐、*4</li> <li>富强、*、文明、和谐、*5</li> <li>富强、*、文明、和谐、*6</li> </ul> <ul class="notice-list" id="notice-list-2"> </ul> </div> </div> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <script> var ROLL_SPEED = 100 var noticeList1 = $(‘#notice-list‘); var noticeList2 = $(‘#notice-list-2‘); var listWrapper = $(‘#list-wrapper‘); noticeList2.html(noticeList1.html()) listWrapper.css(‘top‘, 0) var timer = setInterval(rollStart, ROLL_SPEED); function rollStart() { if (Math.abs(_subStr(listWrapper.css(‘top‘))) >= noticeList1.height()) { listWrapper.css(‘top‘, 0) } else { var top = listWrapper.css(‘top‘); listWrapper.css(‘top‘, _subStr(top) - 1) } } // 截取px前数值 function _subStr(str) { var index = str.indexOf(‘px‘); if (index > -1) { return parseFloat(str.substr(0, index + 1)) } } </script> </body> </html>