1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> 5 <title>Document</title> 6 </head> 7 <body> 8 <div class="box box-link in-home"></div> 9 <div class="box-link in-home box"></div> 10 <div class="box-link box in-home"></div> 11 <div class="box"></div> 12 <div class="box-link in-home"></div> 13 <script type="text/javascript"> 14 var reg = /(^| )box( |$)/; 15 var elems = document.getElementsByTagName("div"); 16 for (var i = 0; i < elems.length; i++) { 17 //console.log(elems[i].className); 18 if (elems[i].className.match(reg) !== null) { 19 console.log("true"); 20 } else { 21 console.log("false"); 22 } 23 }; 24 </script> 25 </body> 26 </html>
检测div里的class是否存在box