@gpaol/bootstrap-multiselect

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Bootstrap 5 MultiSelect component with search, filtering, grouped options, pagination, and comprehensive localization support
github.com/gpaol/bootstrap-multiselect
gpaol/bootstrap-multiselect
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CSS
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/*!
 * Bootstrap MultiSelect - CSS Styles v1.2.0
 * 
 * Additional styles and enhancements for the Bootstrap MultiSelect plugin
 * 
 * Authors: Paolo Gaetano
 * Copyright (c) 2026 Paolo Gaetano
 * Released under the MIT license
 * 
 * @requires jQuery >= 3.6
 * @requires Bootstrap >= 5.0
 */

/* ==========================================================================
   Container Styles
   ========================================================================== */

.bs-multiselect-container {
    position: relative;
    display: inline-block;
}

.bs-multiselect-container .dropdown-toggle {
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.bs-multiselect-container .dropdown-toggle::after {
    flex-shrink: 0;
}

/* ==========================================================================
   Button Styles
   ========================================================================== */

.bs-multiselect-placeholder {
    flex-grow: 1;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.bs-multiselect-badge {
    flex-shrink: 0;
    border-radius: 10px;
    padding: 0.25em 0.5em;
    font-size: 0.75em;
    font-weight: 600;
    line-height: 1;
}

/* ==========================================================================
   Dropdown Menu Styles
   ========================================================================== */

.bs-multiselect-container .dropdown-menu {
    padding: 0;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(0, 0, 0, 0.15);
    background-color: #ffffff !important;
}

/* jQuery Validation - Show green border for valid fields */
form .bs-multiselect-container > .is-valid  {
  border-color: #198754;
  padding-right: calc(1.5em + 0.75rem);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e") !important;
  background-repeat: no-repeat;
  background-position: right calc(0.375em + 0.1875rem) center;
  background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

 form .bs-multiselect-container > .is-valid:focus {
  border-color: #198754;
  box-shadow: 0 0 0 0.25rem rgba(25, 135, 84, 0.25);
}



/* ==========================================================================
   Search Input Styles
   ========================================================================== */

.bs-multiselect-search {
    border: 1px solid #dee2e6;
    border-radius: 0.25rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.bs-multiselect-search:focus {
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* ==========================================================================
   Options Styles
   ========================================================================== */

.bs-multiselect-options {
    background-color: #ffffff;
}

.bs-multiselect-option {
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: background-color 0.15s ease-in-out;
    user-select: none;
    background-color: #ffffff !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.bs-multiselect-option:hover {
    background-color: #f8f9fa !important;
}

.bs-multiselect-option.disabled,
.bs-multiselect-option:has(.form-check-input:disabled) {
    opacity: 0.5;
    cursor: not-allowed;
}

.bs-multiselect-option.disabled:hover,
.bs-multiselect-option:has(.form-check-input:disabled):hover {
    background-color: #ffffff !important;
}

.bs-multiselect-option .form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    margin-bottom: 0;
    padding-left: 0;
}

.bs-multiselect-option .form-check-input {
    cursor: pointer;
    margin-top: 0;
    margin-left: 0;
    flex-shrink: 0;
    float: none;
}

.bs-multiselect-option .form-check-label {
    cursor: pointer;
    margin-bottom: 0;
    padding-left: 0;
    color: #212529 !important;
    flex-grow: 1;
}

.bs-multiselect-option .form-check-input:disabled ~ .form-check-label {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==========================================================================
   OptGroup Styles
   ========================================================================== */

.bs-multiselect-optgroup {
    margin-bottom: 0.5rem;
}

.bs-multiselect-optgroup:last-child {
    margin-bottom: 0;
}

.bs-multiselect-optgroup > div:first-child {
    font-weight: 600;
    color: #6c757d;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

/* ==========================================================================
   Action Buttons Styles
   ========================================================================== */

.bs-multiselect-select-all,
.bs-multiselect-deselect-all {
    font-size: 0.875rem;
    padding: 0.375rem 0.75rem;
    transition: all 0.15s ease-in-out;
}

.bs-multiselect-select-all:hover,
.bs-multiselect-deselect-all:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.bs-multiselect-select-all:disabled,
.bs-multiselect-select-all.disabled,
.bs-multiselect-deselect-all:disabled,
.bs-multiselect-deselect-all.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.bs-multiselect-select-all:disabled:hover,
.bs-multiselect-select-all.disabled:hover,
.bs-multiselect-deselect-all:disabled:hover,
.bs-multiselect-deselect-all.disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ==========================================================================
   No Results Message
   ========================================================================== */

.bs-multiselect-no-results {
    padding: 1rem;
    color: #6c757d;
    font-style: italic;
}

/* ==========================================================================
   Pagination Controls
   ========================================================================== */

.bs-multiselect-pagination {
    padding: 0.5rem 0;
    margin: 0;
    border-top: 1px solid #dee2e6;
    background-color: #f8f9fa;
    flex-shrink: 0; /* Prevent pagination from being compressed */
}

/* Top pagination */
.bs-multiselect-pagination.pagination-top {
    border-top: none;
    border-bottom: 1px solid #dee2e6;
}

/* Bottom pagination */
.bs-multiselect-pagination.pagination-bottom {
    border-top: 1px solid #dee2e6;
    border-bottom: none;
}

/* When pagination is on both sides */
.bs-multiselect-pagination.pagination-top + .bs-multiselect-options {
    border-top: 1px solid #dee2e6;
}

.bs-multiselect-prev-page,
.bs-multiselect-next-page {
    font-size: 0.8125rem;
    padding: 0.25rem 0.75rem;
    transition: all 0.15s ease-in-out;
    min-width: 80px;
}

.bs-multiselect-prev-page:hover:not(:disabled),
.bs-multiselect-next-page:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.bs-multiselect-prev-page:disabled,
.bs-multiselect-next-page:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.bs-multiselect-page-info {
    font-size: 0.875rem;
    font-weight: 500;
    color: #495057;
    padding: 0 0.5rem;
    white-space: nowrap;
}

/* ==========================================================================
   Loading State
   ========================================================================== */

.bs-multiselect-loading {
    text-align: center;
    padding: 1rem;
    color: #6c757d;
}

.bs-multiselect-loading::after {
    content: '';
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid #6c757d;
    border-radius: 50%;
    border-top-color: transparent;
    animation: bs-multiselect-spin 0.6s linear infinite;
    margin-left: 0.5rem;
}

@keyframes bs-multiselect-spin {
    to {
        transform: rotate(360deg);
    }
}

/* ==========================================================================
   Disabled State
   ========================================================================== */

.bs-multiselect-container .dropdown-toggle:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */

@media (max-width: 576px) {
    .bs-multiselect-container .dropdown-menu {
        max-width: 100vw;
        max-height: 70vh !important;
    }

    .bs-multiselect-options {
        max-height: 50vh;
    }

    .bs-multiselect-select-all,
    .bs-multiselect-deselect-all {
        font-size: 0.8125rem;
        padding: 0.25rem 0.5rem;
    }
}

/* ==========================================================================
   Dark Mode Support - DISABLED (using light theme only)
   ========================================================================== */

/* 
@media (prefers-color-scheme: dark) {
    .bs-multiselect-container .dropdown-menu {
        background-color: #212529;
        border-color: #495057;
    }

    .bs-multiselect-option {
        background-color: #212529;
        color: #ffffff;
    }

    .bs-multiselect-option:hover {
        background-color: #343a40;
    }

    .bs-multiselect-option .form-check-label {
        color: #ffffff;
    }

    .bs-multiselect-search {
        background-color: #212529;
        border-color: #495057;
        color: #fff;
    }

    .bs-multiselect-search:focus {
        border-color: #6ea8fe;
        box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
    }

    .bs-multiselect-no-results,
    .bs-multiselect-loading {
        color: #adb5bd;
    }
}
*/

/* Dark mode via Bootstrap data attribute - DISABLED */
/*
[data-bs-theme="dark"] .bs-multiselect-container .dropdown-menu {
    background-color: #212529;
    border-color: #495057;
}

[data-bs-theme="dark"] .bs-multiselect-option {
    background-color: #212529;
    color: #ffffff;
}

[data-bs-theme="dark"] .bs-multiselect-option:hover {
    background-color: #343a40;
}

[data-bs-theme="dark"] .bs-multiselect-option .form-check-label {
    color: #ffffff;
}

[data-bs-theme="dark"] .bs-multiselect-search {
    background-color: #212529;
    border-color: #495057;
    color: #fff;
}

[data-bs-theme="dark"] .bs-multiselect-search:focus {
    border-color: #6ea8fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

[data-bs-theme="dark"] .bs-multiselect-no-results,
[data-bs-theme="dark"] .bs-multiselect-loading {
    color: #adb5bd;
}
*/

/* ==========================================================================
   Theme Variants
   ========================================================================== */

/* Primary Theme */
.bs-multiselect-container.theme-primary .bs-multiselect-badge {
    background-color: #0d6efd !important;
}

/* Secondary Theme */
.bs-multiselect-container.theme-secondary .bs-multiselect-badge {
    background-color: #6c757d !important;
}

/* Success Theme */
.bs-multiselect-container.theme-success .bs-multiselect-badge {
    background-color: #198754 !important;
}

/* Danger Theme */
.bs-multiselect-container.theme-danger .bs-multiselect-badge {
    background-color: #dc3545 !important;
}

/* Warning Theme */
.bs-multiselect-container.theme-warning .bs-multiselect-badge {
    background-color: #ffc107 !important;
    color: #000 !important;
}

/* Info Theme */
.bs-multiselect-container.theme-info .bs-multiselect-badge {
    background-color: #0dcaf0 !important;
    color: #000 !important;
}

/* Light Theme */
.bs-multiselect-container.theme-light .bs-multiselect-badge {
    background-color: #f8f9fa !important;
    color: #000 !important;
}

/* Dark Theme */
.bs-multiselect-container.theme-dark .bs-multiselect-badge {
    background-color: #212529 !important;
}

/* ==========================================================================
   Animation Utilities
   ========================================================================== */

.bs-multiselect-fade-in {
    animation: bs-multiselect-fadeIn 0.2s ease-in;
}

@keyframes bs-multiselect-fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Custom Checkbox Styles (Optional Enhancement)
   ========================================================================== */

.bs-multiselect-option .form-check-input:checked {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.bs-multiselect-option .form-check-input:focus {
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* ==========================================================================
   Compact Mode
   ========================================================================== */

.bs-multiselect-compact .bs-multiselect-option {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.bs-multiselect-compact .bs-multiselect-select-all,
.bs-multiselect-compact .bs-multiselect-deselect-all {
    font-size: 0.8125rem;
    padding: 0.25rem 0.5rem;
}

.bs-multiselect-compact .bs-multiselect-search {
    font-size: 0.8125rem;
    padding: 0.25rem 0.5rem;
}