breakpoint-infix($breakpoint, $grid-breakpoints);\n\n    .dropdown-menu#{$infix}-left {\n      right: auto;\n      left: 0;\n    }\n\n    .dropdown-menu#{$infix}-right {\n      right: 0;\n      left: auto;\n    }\n  }\n}\n\n// Allow for dropdowns to go bottom up (aka, dropup-menu)\n// Just add .dropup after the standard .dropdown class and you're set.\n.dropup {\n  .dropdown-menu {\n    top: auto;\n    bottom: 100%;\n    margin-top: 0;\n    margin-bottom: $dropdown-spacer;\n  }\n\n  .dropdown-toggle {\n    @include...