<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>循环控制</title></head><body><p>加油</p><p>武汉</p><p>加油</p><p>中国</p> <script> var elem=document.getElementsByTagName('p'); for (var i=0;i<elem.length;i++){ console.log(elem[i]); } </script></body></html>
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