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使用box-shadow utilities向元素添加或删除阴影。

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示例

虽然组件上的阴影在Bootstrap中默认禁用,并且可以通过$enable-shadows启用,但您也可以使用我们的box-shadow实用程序类快速添加或删除阴影。 包括对.shadow-none和三种默认大小(具有要匹配的关联变量)的支持。

No shadow
Small shadow
Regular shadow
Larger shadow
html
<div class="shadow-none p-3 mb-5 bg-body-tertiary rounded">No shadow</div>
<div class="shadow-sm p-3 mb-5 bg-body-tertiary rounded">Small shadow</div>
<div class="shadow p-3 mb-5 bg-body-tertiary rounded">Regular shadow</div>
<div class="shadow-lg p-3 mb-5 bg-body-tertiary rounded">Larger shadow</div>

CSS

Sass variables

$box-shadow:                  0 .5rem 1rem rgba($black, .15);
$box-shadow-sm:               0 .125rem .25rem rgba($black, .075);
$box-shadow-lg:               0 1rem 3rem rgba($black, .175);
$box-shadow-inset:            inset 0 1px 2px rgba($black, .075);

Sass utilities API

Shadow utilities 我们的utilities API中声明在scss/_utilities.scss了解如何使用实用程序API。

"shadow": (
  property: box-shadow,
  class: shadow,
  values: (
    null: var(--#{$prefix}box-shadow),
    sm: var(--#{$prefix}box-shadow-sm),
    lg: var(--#{$prefix}box-shadow-lg),
    none: none,
  )
),