应答的适用

breakpoint

$grid-breakpoints: (
  xs: 0,
  sm: 576px,
  md: 768px,
  lg: 992px,
  xl: 1200px,
  xxl: 1400px
);

使用

// min-width
@include media-breakpoint-up(sm) { ... }
@include media-breakpoint-up(md) { ... }
@include media-breakpoint-up(lg) { ... }
@include media-breakpoint-up(xl) { ... }
@include media-breakpoint-up(xxl) { ... }

// sm
@media (min-width: 576px) { ... }
// md
@media (min-width: 768px) { ... }
// lg
@media (min-width: 992px) { ... }
// xl
@media (min-width: 1200px) { ... }
// xxl
@media (min-width: 1400px) { ... }

// ex
.custom-class {
  display: none;
}
@include media-breakpoint-up(sm) {
  .custom-class {
    display: block;
  }
}

// max-width
@include media-breakpoint-down(sm) { ... }
@include media-breakpoint-down(md) { ... }
@include media-breakpoint-down(lg) { ... }
@include media-breakpoint-down(xl) { ... }
@include media-breakpoint-down(xxl) { ... }

// sm
@media (max-width: 575.98px) { ... }
// md
@media (max-width: 767.98px) { ... }
// lg
@media (max-width: 991.98px) { ... }
// xl
@media (max-width: 1199.98px) { ... }
// xxl
@media (max-width: 1399.98px) { ... }

// ex
@include media-breakpoint-down(md) {
  .custom-class {
    display: block;
  }
}