css - Bootstrap v4 网格大小/Sass 列表

Question

我试图在我的元素中使用 Bootstrap v4 变量，但它存储在一个数组中 (_variables.scss):

$grid-breakpoints: (
  xs: 0,
  sm: 544px,
  md: 768px,
  lg: 992px,
  xl: 1200px
) !default;

如何在我的 sass 中引用它:

@media(max-width: $grid-breakpoints[xs]) {
  font-size: 20px;
}

Answer 1

你可以使用$map-get..

@media (min-width: map-get($grid-breakpoints, xs)) and (max-width: map-get($grid-breakpoints, sm)){
  [class*='col-'] {
    font-size: 20px;
   }
}

$grid-breakpoints demo

Bootstrap 4 中还有几个断点 mixin，可用于针对特定断点...

@include media-breakpoint-between(sm, md){
  ...
}

@include media-breakpoint-only(lg){
  ...
}

media-breakpoint mixin demo