Bootstrap 4 - 如何使用媒体查询 mixin [英] Bootstrap 4 - how to use media query mixin

问题描述

我如何设置媒体断点让我们说从中到大 - 我是嵌套 min mixin 和 max mixin 还是我该怎么做.

How do I set a media breakpoint let's say from medium to large - do I nest the min mixin and max mixin or how do I do that.

我想要的输出是这样的:@media (min-width: 480px) 和 (max-width: 767px) 使用断点 mixin.

the output I'm after is something like this: @media (min-width: 480px) and (max-width: 767px) using the breakpoint mixin.

推荐答案

使用 media-breakpoint-between($lower, $upper)

依赖关系

mixin 在 mixins/_breakpoints.scss 中声明，并依赖于 _variables.scss 中的 $grid-breakpoints 映射.

The mixins are declared in mixins/_breakpoints.scss, and depend on the $grid-breakpoints map, found in _variables.scss.

断点图:

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

混合:

@include media-breakpoint-between(sm, md) {
    // your code
}

编译为

@media (min-width: 576px) and (max-width: 991px) {}

重要通知

Media-breakpoint-between mixin 使用声明断点的下"和上"值.

Media-breakpoint-between mixin uses 'lower' and 'upper' values of declared breakpoint.

• 断点的'lower'值是在$grid-breakpoint 映射.

• The 'lower' value of breakpoint is the declared value in $grid-breakpoint map.

特定断点的'upper'值等于更高的断点减去 1px.

The 'upper' value of specific breakpoint is equal to the value of higher breakpoint minus 1px.

上&下断点值示例(基于 od $grid-breakpoint map)

Upper & lower breakpoint values example (based od $grid-breakpoint map)

Lower value of md is equal to 576
Upper value of md is equal to 991 ( value of next breakpoint (lg) minus 1px (992px-1px)

其他媒体混合

@include media-breakpoint-up(sm) {} 创建一个最小宽度为 $sm 的断点.

@include media-breakpoint-up(sm) {} creates a breakpoint with a min-width of $sm.

@include media-breakpoint-down(md) {} 创建一个最大宽度为 $md 的断点.

@include media-breakpoint-down(md) {} creates a breakpoint with a max-width of $md.

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