目标的滚动条样式设置

#homeworkCenter_xx_pic::-webkit-scrollbar {
width: 8px;
}

#homeworkCenter_xx_pic::-webkit-scrollbar-track {
background-color: #eee;
}

#homeworkCenter_xx_pic::-webkit-scrollbar-track-piece {
background-color: #e1e1e1;
}

#homeworkCenter_xx_pic::-webkit-scrollbar-thumb {
background-color: #ccc;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
border-radius: 6px;
}

 

最终效果：