参考：
https://blog.csdn.net/realDE/article/details/74278050
https://blog.csdn.net/liaobc/article/details/6137770
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>调试</title> <style> .btn-group{ display:inline-block; position: relative; vertical-align:middle; border:5px solid #ccc; } .btn-group input,.btn-group button{ padding:0; margin:0; } .btn-group .input{ display:inline-block; height:30px; float:left; border:none; outline:none; } .btn-group .btn{ display:inline-block; font-size:15px; height:30px; float:left } </style> </head> <body> <div class="btn-group"> <input class="input" type="text"> <button class="btn" type="button" name="button">按钮</button> </div> </body> </html>