Bootstrap 5 Range Slider with Fill and Tick Marks

<section class="wdw-stage">
  <div class="container" style="max-width: 760px">
    <div class="text-center mb-4">
      <span class="wdw-eyebrow">Configurator</span>
      <h2 class="wdw-heading display-6 mt-1 mb-1">Pick your size</h2>
      <p class="wdw-muted mb-0">Slide to set the dimension.</p>
    </div>
    <div class="vstack gap-4">
      <div class="wdw-card p-4 p-md-5 wdw-slider" data-min="0" data-max="300" data-step="10" data-ticks="6" data-value="150" data-unit="cm">
        <div class="d-flex justify-content-between align-items-baseline mb-4">
          <label class="fw-semibold" for="sizeRange">Total size</label>
          <output class="wdw-heading fs-2" for="sizeRange"><span class="wdw-val">150</span> <small class="wdw-muted fs-6 fw-semibold">cm</small></output>
        </div>
        <div class="wdw-track">
          <input type="range" class="wdw-range" id="sizeRange" min="0" max="300" step="10" value="150">
          <div class="wdw-ticks" aria-hidden="true"></div>
        </div>
        <div class="wdw-labels small wdw-muted" aria-hidden="true"></div>
      </div>
      <div class="wdw-card p-4 p-md-5 wdw-slider" data-min="0" data-max="100" data-step="5" data-ticks="4" data-value="35" data-unit="%">
        <div class="d-flex justify-content-between align-items-baseline mb-4">
          <label class="fw-semibold" for="discRange">Deposit</label>
          <output class="wdw-heading fs-2" for="discRange"><span class="wdw-val">35</span> <small class="wdw-muted fs-6 fw-semibold">%</small></output>
        </div>
        <div class="wdw-track">
          <input type="range" class="wdw-range" id="discRange" min="0" max="100" step="5" value="35">
          <div class="wdw-ticks" aria-hidden="true"></div>
        </div>
        <div class="wdw-labels small wdw-muted" aria-hidden="true"></div>
      </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 */
.wdw-track { position: relative; height: 1.75rem; }
.wdw-range { --p: 50%; position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; appearance: none; -webkit-appearance: none; background: transparent; cursor: pointer; z-index: 2; }
.wdw-range:focus { outline: none; }
.wdw-range::-webkit-slider-runnable-track { height: .5rem; border-radius: 99px; background: linear-gradient(to right, var(--bs-primary) var(--p), var(--bs-border-color) var(--p)); }
.wdw-range::-moz-range-track { height: .5rem; border-radius: 99px; background: var(--bs-border-color); }
.wdw-range::-moz-range-progress { height: .5rem; border-radius: 99px; background: var(--bs-primary); }
.wdw-range::-webkit-slider-thumb { -webkit-appearance: none; width: 1.75rem; height: 1.75rem; margin-top: -.625rem; border-radius: 50%; background: #fff; border: 4px solid var(--bs-primary); box-shadow: var(--wdw-shadow-sm); transition: transform .15s; }
.wdw-range::-moz-range-thumb { width: 1.25rem; height: 1.25rem; border-radius: 50%; background: #fff; border: 4px solid var(--bs-primary); box-shadow: var(--wdw-shadow-sm); }
.wdw-range:hover::-webkit-slider-thumb { transform: scale(1.1); }
.wdw-range:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 .3rem var(--bs-focus-ring-color); }
.wdw-range:focus-visible::-moz-range-thumb { box-shadow: 0 0 0 .3rem var(--bs-focus-ring-color); }
.wdw-ticks { position: absolute; left: .875rem; right: .875rem; top: 1.45rem; height: .5rem; z-index: 1; pointer-events: none; }
.wdw-ticks i { position: absolute; top: 0; width: 2px; height: .5rem; margin-left: -1px; background: var(--bs-border-color); border-radius: 1px; }
.wdw-ticks i.on { background: var(--bs-primary); }
.wdw-labels { position: relative; height: 1.25rem; margin: 1.1rem .875rem 0 !important; font-variant-numeric: tabular-nums; }
.wdw-labels span { position: absolute; transform: translateX(-50%); }

function initSliders() {
  document.querySelectorAll('.wdw-slider').forEach(function (box) {
    var input = box.querySelector('.wdw-range');
    var out = box.querySelector('.wdw-val');
    var ticks = box.querySelector('.wdw-ticks');
    var labels = box.querySelector('.wdw-labels');
    if (!input || !out || !ticks || !labels) return;
    var min = +input.min, max = +input.max, n = +box.dataset.ticks;
    var marks = [];
    for (var i = 0; i <= n; i++) {
      var v = min + ((max - min) * i) / n;
      var t = document.createElement('i');
      t.style.left = (i / n) * 100 + '%';
      ticks.appendChild(t);
      marks.push({ el: t, v: v });
      var l = document.createElement('span');
      l.textContent = Math.round(v); l.style.left = (i / n) * 100 + "%";
      labels.appendChild(l);
    }
    function update() {
      var val = +input.value;
      var pct = ((val - min) / (max - min)) * 100;
      input.style.setProperty('--p', pct + '%');
      out.textContent = val;
      marks.forEach(function (m) { m.el.classList.toggle('on', m.v <= val); });
    }
    input.addEventListener('input', update);
    update();
  });
}

initSliders();