使用.table-hover类，当光标悬停在行上方时，将向其添加浅灰色背景。
您可以尝试运行以下代码以实现table-hover类-
<!DOCTYPE html> <html> <head> <title>Bootstrap Table</title> <meta name = "viewport" content = "width=device-width, initial-scale = 1"> <link rel = "stylesheet" href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css"> <script src = "https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script> <script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> </head> <body> <table class = "table table-hover table-bordered table-striped"> <caption>Footballer Rank</caption> <thead> <tr> <th>Footballer</th> <th>Rank</th> <th>Country</th> </tr> </thead> <tbody> <tr> <td>Messi</td> <td>1</td> <td>Argentina</td> </tr> <tr> <td>Neymar</td> <td>2</td> <td>Brazil</td> </tr> <tr> <td>Ronaldo</td> <td>3</td> <td>Portugal</td> </tr> </tbody> </table> </body> </html>