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- .fade {
- @include transition($transition-fade);
- &:not(.show) {
- opacity: 0;
- }
- }
- .collapse {
- &:not(.show) {
- display: none;
- }
- }
- .collapsing {
- position: relative;
- height: 0;
- overflow: hidden;
- @include transition($transition-collapse);
- }
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