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| // 绝对定位 参数：上,右,下,左
| @mixin position-absolute($top: null, $right: null, $bottom: null, $left: null) {
| position: absolute;
| @if ($left!="" and $left!=null) {
| left: $left;
| }
| @if ($right!="" and $right!=null) {
| right: $right;
| }
| @if ($top!="" and $top!=null) {
| top: $top;
| }
| @if ($bottom!="" and $bottom!=null) {
| bottom: $bottom;
| }
| }
|
|
