Vue Modal Component Styling

Modal Styling

Learn how to customize the Vue Modal component with CSS classes, variables, and SASS for flexible styling and seamless integration into your design.

On this page

CSS variables

Vue modals use local CSS variables on .modal and .modal-backdrop for enhanced real-time customization. Values for the CSS variables are set via Sass, so Sass customization is still supported, too.

scss

--cui-modal-zindex: #{$zindex-modal};
--cui-modal-width: #{$modal-md};
--cui-modal-padding: #{$modal-inner-padding};
--cui-modal-margin: #{$modal-dialog-margin};
--cui-modal-color: #{$modal-content-color};
--cui-modal-bg: #{$modal-content-bg};
--cui-modal-border-color: #{$modal-content-border-color};
--cui-modal-border-width: #{$modal-content-border-width};
--cui-modal-border-radius: #{$modal-content-border-radius};
--cui-modal-box-shadow: #{$modal-content-box-shadow-xs};
--cui-modal-inner-border-radius: #{$modal-content-inner-border-radius};
--cui-modal-header-padding-x: #{$modal-header-padding-x};
--cui-modal-header-padding-y: #{$modal-header-padding-y};
--cui-modal-header-padding: #{$modal-header-padding}; // Todo in v6: Split this padding into x and y
--cui-modal-header-border-color: #{$modal-header-border-color};
--cui-modal-header-border-width: #{$modal-header-border-width};
--cui-modal-title-line-height: #{$modal-title-line-height};
--cui-modal-footer-gap: #{$modal-footer-margin-between};
--cui-modal-footer-bg: #{$modal-footer-bg};
--cui-modal-footer-border-color: #{$modal-footer-border-color};
--cui-modal-footer-border-width: #{$modal-footer-border-width};

scss

--cui-backdrop-zindex: #{$zindex-modal-backdrop};
--cui-backdrop-bg: #{$modal-backdrop-bg};
--cui-backdrop-opacity: #{$modal-backdrop-opacity};

How to use CSS variables

const vars = { 
  '--my-css-var': 10,
  '--my-another-css-var': "red" 
}
return <CModal :style="vars">...</CModal>

SASS variables

scss

$modal-inner-padding:               $spacer !default;

$modal-footer-margin-between:       .5rem !default;

$modal-dialog-margin:               .5rem !default;
$modal-dialog-margin-y-sm-up:       1.75rem !default;

$modal-title-line-height:           $line-height-base !default;

$modal-content-color:               var(--cui-body-color) !default;
$modal-content-bg:                  var(--cui-body-bg) !default;
$modal-content-border-color:        var(--cui-border-color-translucent) !default;
$modal-content-border-width:        var(--cui-border-width) !default;
$modal-content-border-radius:       var(--cui-border-radius-lg) !default;
$modal-content-inner-border-radius: subtract($modal-content-border-radius, $modal-content-border-width) !default;
$modal-content-box-shadow-xs:       var(--cui-box-shadow-sm) !default;
$modal-content-box-shadow-sm-up:    var(--cui-box-shadow) !default;

$modal-backdrop-bg:                 $black !default;
$modal-backdrop-opacity:            .5 !default;

$modal-header-border-color:         var(--cui-border-color) !default;
$modal-header-border-width:         $modal-content-border-width !default;
$modal-header-padding-y:            $modal-inner-padding !default;
$modal-header-padding-x:            $modal-inner-padding !default;
$modal-header-padding:              $modal-header-padding-y $modal-header-padding-x !default; // Keep this for backwards compatibility

$modal-footer-bg:                   null !default;
$modal-footer-border-color:         $modal-header-border-color !default;
$modal-footer-border-width:         $modal-header-border-width !default;

$modal-sm:                          300px !default;
$modal-md:                          500px !default;
$modal-lg:                          800px !default;
$modal-xl:                          1140px !default;

$modal-fade-transform:              translate(0, -50px) !default;
$modal-show-transform:              none !default;
$modal-transition:                  transform .3s ease-out !default;
$modal-scale-transform:             scale(1.02) !default;

SASS loops

Responsive fullscreen modals are generated via the $breakpoints map and a loop in scss/_modal.scss.

scss

@each $breakpoint in map.keys($grid-breakpoints) {
  $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
  // stylelint-disable-next-line scss/at-function-named-arguments
  $postfix: if(sass($infix != ""): $infix + "-down"; else: "");

  @include media-breakpoint-down($breakpoint) {
    .modal-fullscreen#{$postfix} {
      width: 100vw;
      max-width: none;
      height: 100%;
      margin: 0;

      .modal-content {
        height: 100%;
        border: 0;
        @include border-radius(0);
      }

      .modal-header,
      .modal-footer {
        @include border-radius(0);
      }

      .modal-body {
        overflow-y: auto;
      }
    }
  }
}