¥Example
提供一个选项来消除或关闭带有
.btn-close
的组件。默认样式有限，但高度可定制。修改 Sass 变量以替换默认的
background-image
。请务必包含屏幕阅读器的文本，就像我们对
aria-label
所做的那样。
¥Provide an option to dismiss or close a component with
.btn-close
. Default styling is limited, but highly customizable. Modify the Sass variables to replace the default
background-image
.
Be sure to include text for screen readers
, as we’ve done with
aria-label
.
¥Disabled state
禁用的关闭按钮会更改其
opacity
。我们还应用了
pointer-events: none
和
user-select: none
来防止触发悬停和活动状态。
¥Disabled close buttons change their
opacity
. We’ve also applied
pointer-events: none
and
user-select: none
to preventing hover and active states from triggering.
Heads up!
As of v5.3.0, the
.btn-close-white
class is deprecated. Instead, use
data-bs-theme="dark"
to change the color mode of the close button.
将
data-bs-theme="dark"
添加到
.btn-close
或其父元素，以反转关闭按钮。这使用
filter
属性来反转
background-image
而不覆盖其值。
¥Add
data-bs-theme="dark"
to the
.btn-close
, or to its parent element, to invert the close button. This uses the
filter
property to invert the
background-image
without overriding its value.
<div data-bs-theme="dark">
<button type="button" class="btn-close" aria-label="Close"></button>
<button type="button" class="btn-close" disabled aria-label="Close"></button>
</div>
¥Variables
Added in v5.3.0
作为 Bootstrap 不断发展的 CSS 变量方法的一部分，关闭按钮现在使用
.btn-close
上的本地 CSS 变量来增强实时自定义。CSS 变量的值是通过 Sass 设置的，因此仍然支持 Sass 自定义。
¥As part of Bootstrap’s evolving CSS variables approach, close button now uses local CSS variables on
.btn-close
for enhanced real-time customization. Values for the CSS variables are set via Sass, so Sass customization is still supported, too.
scss/_close.scss
--#{$prefix}btn-close-color: #{$btn-close-color};
--#{$prefix}btn-close-bg: #{ escape-svg($btn-close-bg) };
--#{$prefix}btn-close-opacity: #{$btn-close-opacity};
--#{$prefix}btn-close-hover-opacity: #{$btn-close-hover-opacity};
--#{$prefix}btn-close-focus-shadow: #{$btn-close-focus-shadow};
--#{$prefix}btn-close-focus-opacity: #{$btn-close-focus-opacity};
--#{$prefix}btn-close-disabled-opacity: #{$btn-close-disabled-opacity};
--#{$prefix}btn-close-white-filter: #{$btn-close-white-filter};
Sass 变量
¥Sass variables
scss/_variables.scss
$btn-close-width: 1em;
$btn-close-height: $btn-close-width;
$btn-close-padding-x: .25em;
$btn-close-padding-y: $btn-close-padding-x;
$btn-close-color: $black;
$btn-close-bg: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$btn-close-color}'><path d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414'/></svg>");
$btn-close-focus-shadow: $focus-ring-box-shadow;
$btn-close-opacity: .5;
$btn-close-hover-opacity: .75;
$btn-close-focus-opacity: 1;
$btn-close-disabled-opacity: .25;
$btn-close-white-filter: invert(1) grayscale(100%) brightness(200%);
