Bootstrap 5 CSS Loaders and Loading Button

<section class="wdw-stage">
  <div class="container" style="max-width: 760px">
    <div class="wdw-card p-4 p-md-5">
      <div class="text-center">
        <span class="wdw-eyebrow mb-2">Loading states</span>
        <h2 class="wdw-heading h3 mb-4">Pure CSS loaders</h2>
        <div class="ld-liquid mx-auto" role="status"><span class="visually-hidden">Loading...</span></div>
        <p class="wdw-muted mt-4 mb-0">Syncing your workspace…</p>
      </div>

      <div class="row g-3 mt-4">
        <div class="col-4">
          <div class="bg-body-tertiary rounded-4 p-3 p-md-4 text-center h-100">
            <div class="ld-ring mx-auto" role="status"><span class="visually-hidden">Loading...</span></div>
            <p class="small fw-semibold mt-3 mb-0">Ring</p>
          </div>
        </div>
        <div class="col-4">
          <div class="bg-body-tertiary rounded-4 p-3 p-md-4 text-center h-100">
            <div class="ld-dots mx-auto" role="status"><i></i><i></i><i></i><span class="visually-hidden">Loading...</span></div>
            <p class="small fw-semibold mt-3 mb-0">Dots</p>
          </div>
        </div>
        <div class="col-4">
          <div class="bg-body-tertiary rounded-4 p-3 p-md-4 text-center h-100">
            <div class="ld-bars mx-auto" role="status"><i></i><i></i><i></i><i></i><span class="visually-hidden">Loading...</span></div>
            <p class="small fw-semibold mt-3 mb-0">Bars</p>
          </div>
        </div>
      </div>

      <div class="d-flex flex-wrap align-items-center justify-content-center gap-3 mt-4 pt-4 border-top">
        <button type="button" class="btn btn-primary rounded-pill px-4 ld-btn">
          <span class="spinner-border spinner-border-sm d-none" aria-hidden="true"></span>
          <span class="ld-btn-label">Save changes</span>
        </button>
        <span class="small wdw-muted">Click the button to see an inline loading state.</span>
      </div>
    </div>
  </div>
</section>

/* Web Designer Wall library style — shared base for every Bootstrap 5 snippet.
   Indigo accent, Plus Jakarta Sans, soft cards, pill buttons. Works in light and dark. */
@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap");

:root,
[data-bs-theme="light"] {
  --wdw-font: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --bs-body-font-family: var(--wdw-font);
  --bs-primary: #4f46e5;
  --bs-primary-rgb: 79, 70, 229;
  --bs-primary-text-emphasis: #3730a3;
  --bs-primary-bg-subtle: #eef2ff;
  --bs-primary-border-subtle: #c7d2fe;
  --bs-link-color: #4f46e5;
  --bs-link-color-rgb: 79, 70, 229;
  --bs-link-hover-color: #4338ca;
  --bs-link-hover-color-rgb: 67, 56, 202;
  --bs-focus-ring-color: rgba(79, 70, 229, 0.25);
  --bs-border-radius: 0.75rem;
  --bs-border-radius-lg: 1rem;
  --bs-border-radius-xl: 1.25rem;
  --wdw-radius-card: 1.25rem;
  --wdw-shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 16px 40px -16px rgba(16, 24, 40, 0.22);
  --wdw-shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 12px -4px rgba(16, 24, 40, 0.12);
  --wdw-stage: #f5f6fb;
}

[data-bs-theme="dark"] {
  --bs-primary: #818cf8;
  --bs-primary-rgb: 129, 140, 248;
  --bs-primary-text-emphasis: #c7d2fe;
  --bs-primary-bg-subtle: rgba(129, 140, 248, 0.14);
  --bs-primary-border-subtle: rgba(129, 140, 248, 0.35);
  --bs-link-color: #a5b4fc;
  --bs-link-color-rgb: 165, 180, 252;
  --bs-link-hover-color: #c7d2fe;
  --bs-link-hover-color-rgb: 199, 210, 254;
  --bs-focus-ring-color: rgba(129, 140, 248, 0.35);
  --wdw-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px -16px rgba(0, 0, 0, 0.7);
  --wdw-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 12px -4px rgba(0, 0, 0, 0.5);
  --wdw-stage: #0f1117;
}

body { font-family: var(--wdw-font); -webkit-font-smoothing: antialiased; }

/* Bootstrap compiles its blue into these components; point them at the accent. */
.btn-primary {
  --bs-btn-bg: var(--bs-primary); --bs-btn-border-color: var(--bs-primary);
  --bs-btn-hover-bg: #4338ca; --bs-btn-hover-border-color: #4338ca;
  --bs-btn-active-bg: #3730a3; --bs-btn-active-border-color: #3730a3;
  --bs-btn-disabled-bg: var(--bs-primary); --bs-btn-disabled-border-color: var(--bs-primary);
  --bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}
[data-bs-theme="dark"] .btn-primary { --bs-btn-color: #0f1117; --bs-btn-hover-bg: #a5b4fc; --bs-btn-hover-border-color: #a5b4fc; --bs-btn-hover-color: #0f1117; --bs-btn-active-color: #0f1117; }
.btn-outline-primary {
  --bs-btn-color: var(--bs-primary); --bs-btn-border-color: var(--bs-primary);
  --bs-btn-hover-bg: var(--bs-primary); --bs-btn-hover-border-color: var(--bs-primary);
  --bs-btn-active-bg: var(--bs-primary); --bs-btn-active-border-color: var(--bs-primary);
  --bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}
.btn { --bs-btn-font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: .5rem; }
.btn-sm { min-height: 36px; }
.form-control, .form-select { min-height: 44px; border-radius: .75rem; }
.form-control:focus, .form-select:focus, .form-check-input:focus { border-color: rgba(var(--bs-primary-rgb), .6); box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.form-check-input:checked { background-color: var(--bs-primary); border-color: var(--bs-primary); }
.nav-pills { --bs-nav-pills-link-active-bg: var(--bs-primary); }
.nav { --bs-nav-link-color: var(--bs-secondary-color); --bs-nav-link-hover-color: var(--bs-emphasis-color); }
.pagination { --bs-pagination-active-bg: var(--bs-primary); --bs-pagination-active-border-color: var(--bs-primary); --bs-pagination-color: var(--bs-body-color); --bs-pagination-focus-box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.progress, .progress-stacked { --bs-progress-bar-bg: var(--bs-primary); }
.list-group { --bs-list-group-active-bg: var(--bs-primary); --bs-list-group-active-border-color: var(--bs-primary); }
.dropdown-menu { --bs-dropdown-link-active-bg: var(--bs-primary); border-radius: .875rem; box-shadow: var(--wdw-shadow-sm); }
.accordion { --bs-accordion-active-bg: var(--bs-primary-bg-subtle); --bs-accordion-active-color: var(--bs-primary-text-emphasis); --bs-accordion-btn-focus-box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.badge { font-weight: 600; }

/* Library building blocks — use these instead of re-inventing them per snippet. */
.wdw-stage { min-height: 100vh; display: flex; align-items: center; background: var(--wdw-stage); padding-block: 3rem; }
.wdw-card { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: var(--wdw-radius-card); box-shadow: var(--wdw-shadow); }
.wdw-card-sm { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: 1rem; box-shadow: var(--wdw-shadow-sm); }
.wdw-aurora { position: relative; color: #fff; background: radial-gradient(60% 55% at 100% 0, #818cf8 0, transparent 70%), radial-gradient(65% 60% at 0 100%, #ec4899 0, transparent 65%), #1e1b4b; }
.wdw-eyebrow { display: inline-block; font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--bs-primary); }
.wdw-heading { font-weight: 800; letter-spacing: -.02em; color: var(--bs-emphasis-color); }
.wdw-muted { color: var(--bs-secondary-color); }
.wdw-icon { width: 2.75rem; height: 2.75rem; flex: none; display: inline-flex; align-items: center; justify-content: center; border-radius: .875rem; background: var(--bs-primary-bg-subtle); color: var(--bs-primary); }

/* Component */
.ld-liquid { position: relative; width: 112px; height: 112px; border-radius: 1.75rem; overflow: hidden; background: var(--bs-primary-bg-subtle); box-shadow: inset 0 0 0 1px var(--bs-primary-border-subtle); }
.ld-liquid::after { content: ""; position: absolute; left: 50%; top: 50%; width: 220px; height: 220px; margin: -110px 0 0 -110px; border-radius: 42%; background: var(--bs-primary); transform-origin: 50% 50%; animation: ld-wave 3s linear infinite, ld-rise 2s ease-in-out infinite alternate; }
@keyframes ld-wave { to { transform: rotate(360deg); } }
@keyframes ld-rise { from { top: 195px; } to { top: 135px; } }

.ld-ring { width: 40px; height: 40px; border-radius: 50%; border: 4px solid var(--bs-primary-bg-subtle); border-top-color: var(--bs-primary); animation: ld-spin .9s linear infinite; }
@keyframes ld-spin { to { transform: rotate(360deg); } }

.ld-dots { display: flex; gap: 6px; height: 40px; align-items: center; justify-content: center; }
.ld-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--bs-primary); animation: ld-bounce 1s ease-in-out infinite; }
.ld-dots i:nth-child(2) { animation-delay: .15s; }
.ld-dots i:nth-child(3) { animation-delay: .3s; }
@keyframes ld-bounce { 0%, 80%, 100% { transform: scale(.5); opacity: .4; } 40% { transform: scale(1.1); opacity: 1; } }

.ld-bars { display: flex; gap: 4px; height: 40px; align-items: center; justify-content: center; }
.ld-bars i { width: 5px; height: 100%; border-radius: 3px; background: var(--bs-primary); animation: ld-bar 1s ease-in-out infinite; }
.ld-bars i:nth-child(2) { animation-delay: .1s; }
.ld-bars i:nth-child(3) { animation-delay: .2s; }
.ld-bars i:nth-child(4) { animation-delay: .3s; }
@keyframes ld-bar { 0%, 100% { transform: scaleY(.3); } 50% { transform: scaleY(1); } }

@media (prefers-reduced-motion: reduce) {
  .ld-ring, .ld-dots i, .ld-bars i, .ld-liquid::after { animation-duration: 3s; }
}

(function () {
  function initButtonLoader() {
    var btn = document.querySelector('.ld-btn');
    if (!btn) return;
    var spinner = btn.querySelector('.spinner-border');
    var label = btn.querySelector('.ld-btn-label');
    btn.addEventListener('click', function () {
      if (btn.disabled) return;
      btn.disabled = true;
      spinner.classList.remove('d-none');
      label.textContent = 'Saving...';
      setTimeout(function () {
        btn.disabled = false;
        spinner.classList.add('d-none');
        label.textContent = 'Saved';
        setTimeout(function () { label.textContent = 'Save changes'; }, 1500);
      }, 2000);
    });
  }
  initButtonLoader();
})();