<!DOCTYPE html> <html> <head> <title>FireBase</title> <meta charset="UTF-8"> <link href="bootstrap.min.css" rel="stylesheet"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script> <script src="bootstrap.min.js"></script> <script src="sample.js"></script> </head> <body> <div class="row"> <div class="col-sm-4">.col-sm-4</div> <div class="col-sm-4">.col-sm-4</div> <div class="col-sm-4">.col-sm-4</div> </div> </body> </html>
