兼容解决方案: POSITION:FIXED

兼容解决方案: POSITION:FIXED


.fixed-top {
    bottom: auto;
    position: fixed;
    top: 0;
}
.fixed-bottom {
    bottom: 0;
    position: fixed;
    top: auto;
}
.fixed-left {
    left: 0;
    position: fixed;
    right: auto;
}
.fixed-right {
    left: auto;
    position: fixed;
    right: 0;
}