Answers:
试试看:
.table-hover tbody tr:hover td, .table-hover tbody tr:hover th {
  background-color: #color;
}
              这是通过grunt或其他任务运行器编译的bootstrap v4的
您需要更改$table-hover-bg以将悬停设置为突出显示
$table-cell-padding:            .75rem !default;
$table-sm-cell-padding:         .3rem !default;
$table-bg:                      transparent !default;
$table-accent-bg:               rgba(0,0,0,.05) !default;
$table-hover-bg:                rgba(0,0,0,.075) !default;
$table-active-bg:               $table-hover-bg !default;
$table-border-width:            $border-width !default;
$table-border-color:            $gray-lighter !default;
              $table-hover-bg,$table-active-bg依此类推,不是$table-bg-...。以为我疯了一分钟😅–
                    HTML代码:
<table class="table table-hover">
    <thead>
        <tr>
            <th>Firstname</th>
            <th>Lastname</th>
            <th>Email</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>John</td>
            <td>Doe</td>
            <td>john@example.com</td>
        </tr>
        <tr>
            <td>Mary</td>
            <td>Moe</td>
            <td>mary@example.com</td>
        </tr>
        <tr>
            <td>July</td>
            <td>Dooley</td>
            <td>july@example.com</td>
        </tr>
    </tbody>
CSS代码
.table-hover thead tr:hover th, .table-hover tbody tr:hover td {
    background-color: #D1D119;
}
CSS代码指示:
将鼠标悬停在行上:
.table-hover> thead> tr:hover
th的背景色将更改为#D1D119
日
肢体也会发生相同的动作
.table-hover tbody tr:hover td
尝试:
.table-hover > tbody > tr.active:hover > th {
                background-color: #color;
            }
              
td需要?(对不起,我在CSS方面一文不值,尝试学习)