2024年2月7日发(作者：)

代码实现如下： table{overflow: hidden;} td, th{ padding: 10px; position: relative; outline: 0; } td:hover::after, th:hover::after {

content: '';

background-color: lightblue; position: absolute;

left: 0; height: 10000px; top: -5000px; width: 100%; z-index: -1; } td:hover::before { background-color: lightblue; content: '';

height: 100%; top: 0; left: -5000px; position: absolute;

width: 10000px; z-index: -1; }

具体代码：