CSS 设置滚动条样式或隐藏滚动条

盒子装入内容，让盒子滚动并更改滚动条样式

div{
			height:100px;
			overflow-y: auto;
		}
		div::-webkit-scrollbar {
            width: 4px;
        }
        div::-webkit-scrollbar-thumb {
            border-radius: 10px;
            -webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
            background: rgba(0,0,0,0.2);
        }
        div::-webkit-scrollbar-track {
            -webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
            border-radius: 0;
            background: rgba(0,0,0,0.1);
        }