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Close button
A generic close button for dismissing content like modals and alerts.
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Example
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.
<button type="button" class="btn-close" aria-label="Close"></button>Disabled state
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.
<button type="button" class="btn-close" disabled aria-label="Close"></button>White variant
Change the default .btn-close to be white with the .btn-close-white class. This class uses the filter property to invert the background-image.
<button type="button" class="btn-close btn-close-white" aria-label="Close"></button>
<button type="button" class="btn-close btn-close-white" disabled aria-label="Close"></button>Sass
Variables
$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 0 011.414 0L8 6.586 14.293.293a1 1 0 111.414 1.414L9.414 8l6.293 6.293a1 1 0 01-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 01-1.414-1.414L6.586 8 .293 1.707a1 1 0 010-1.414z'/></svg>");
$btn-close-focus-shadow: $input-btn-focus-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%);