点击copy按钮，复制文本内容
test.html
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Title</title> 6 </head> 7 <style> 8 .content { 9 width: 200px; 10 height: 200px; 11 border: 1px solid red; 12 word-break: break-word; 13 } 14 .btn { 15 width: 50px; 16 height: 20px; 17 border: 1px solid blue; 18 text-align: center; 19 background-color: #fff; 20 } 21 </style> 22 <body> 23 <textarea class="content"> 24 copycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopycopy 25 </textarea> 26 <button class="btn" onclick="copyText()">copy</button> 27 </body> 28 <script src="test.js"></script> 29 </html>
test.js
1 function copyText() { 2 var text = document.getElementsByClassName('content')[0]; 3 text.select(); // 选中需要复制的文本 4 document.execCommand("Copy"); // 浏览器复制命令 5 }
注意：这个方法需要复制的内容必须用textarea标签或者其他有select方法的标签进行包裹，否则无法复制。