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陰影 (Shadows)

使用 box-shadow 通用類別來增加或移除陰影。

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範例

雖然在 Bootstrap 中元件上的陰影預設被禁用，且可透過 $enable-shadows 啟用，你也可以使用我們的 box-shadow 通用類別快速增加或移除陰影。包括對 .shadow-none 和其他三個預設大小的支持（有相關的變數用以對應）。

No shadow

Small shadow

Regular shadow

Larger shadow

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

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);

Utilities API

Shadow utilities are declared in our utilities API in scss/_utilities.scss. Learn how to use the utilities API.

    "shadow": (
      property: box-shadow,
      class: shadow,
      values: (
        null: $box-shadow,
        sm: $box-shadow-sm,
        lg: $box-shadow-lg,
        none: none,
      )
    ),