Bootstrap 5 Date Range Picker with Click and Drag

<section class="wdw-stage">
  <div class="container" style="max-width:860px">
    <div class="wdw-card overflow-hidden">
      <div class="row g-0">
        <div class="col-md-7 p-4 p-md-5">
          <div class="d-flex align-items-center justify-content-between mb-4">
            <div>
              <span class="wdw-eyebrow">Select dates</span>
              <h2 class="wdw-heading h4 mb-0" id="wdwMonthLabel" aria-live="polite">Month</h2>
            </div>
            <div class="d-flex gap-2">
              <button type="button" class="btn btn-outline-secondary rounded-circle p-0 wdw-nav" id="wdwPrev" aria-label="Previous month">
                <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m15 6-6 6 6 6"/></svg>
              </button>
              <button type="button" class="btn btn-outline-secondary rounded-circle p-0 wdw-nav" id="wdwNext" aria-label="Next month">
                <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m9 6 6 6-6 6"/></svg>
              </button>
            </div>
          </div>
          <div class="wdw-cal-week" aria-hidden="true">
            <span>Mon</span><span>Tue</span><span>Wed</span><span>Thu</span><span>Fri</span><span>Sat</span><span>Sun</span>
          </div>
          <div class="wdw-cal" id="wdwCal" role="group" aria-label="Calendar"></div>
          <p class="small wdw-muted mt-3 mb-0">Click and drag across days, or click a start and an end date.</p>
        </div>
        <div class="col-md-5 wdw-aurora p-4 p-md-5 d-flex flex-column">
          <p class="small text-uppercase fw-bold text-white-50 mb-4" style="letter-spacing:.08em">Your stay</p>
          <div class="d-flex flex-column gap-3 mb-4">
            <div>
              <p class="small text-white-50 mb-0">Check-in</p>
              <p class="h4 fw-bold mb-0" id="wdwFrom">Select a date</p>
            </div>
            <div>
              <p class="small text-white-50 mb-0">Check-out</p>
              <p class="h4 fw-bold mb-0" id="wdwTo">Select a date</p>
            </div>
          </div>
          <div class="rounded-4 p-3 mb-4 wdw-sum">
            <div class="d-flex justify-content-between small mb-1"><span class="text-white-50" id="wdwNights">0 nights</span><span class="text-white-50">$142 / night</span></div>
            <div class="d-flex justify-content-between align-items-baseline"><span>Total</span><span class="h4 fw-bold mb-0" id="wdwTotal">$0</span></div>
          </div>
          <div class="mt-auto d-grid gap-2">
            <button type="button" class="btn btn-light rounded-pill" id="wdwConfirm">Reserve these dates</button>
            <button type="button" class="btn btn-link link-light link-underline-opacity-0" id="wdwClear">Clear selection</button>
          </div>
        </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-nav { width: 44px; height: 44px; min-height: 44px; }
.wdw-cal-week, .wdw-cal { display: grid; grid-template-columns: repeat(7, 1fr); }
.wdw-cal-week { margin-bottom: .5rem; text-align: center; font-size: .75rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--bs-secondary-color); }
.wdw-cal { row-gap: 4px; touch-action: none; user-select: none; -webkit-user-select: none; }
.wdw-day { position: relative; height: 46px; border: 0; background: transparent; padding: 0; font-weight: 600; font-size: .9375rem; color: var(--bs-body-color); border-radius: 0; font-variant-numeric: tabular-nums; }
.wdw-day.is-blank { visibility: hidden; pointer-events: none; }
.wdw-day:not(.is-blank):hover span { background: var(--bs-tertiary-bg); }
.wdw-day span { position: relative; z-index: 1; display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; border-radius: 50%; transition: background-color .15s, color .15s; }
.wdw-day:focus-visible { outline: 2px solid var(--bs-primary); outline-offset: -2px; border-radius: .75rem; z-index: 2; }
.wdw-day.is-today span { box-shadow: inset 0 0 0 1.5px var(--bs-primary-border-subtle); }
.wdw-day.in-range { background: var(--bs-primary-bg-subtle); color: var(--bs-primary-text-emphasis); }
.wdw-day.in-range:hover span { background: transparent; }
.wdw-day.is-start, .wdw-day.is-end { background: var(--bs-primary-bg-subtle); }
.wdw-day.is-start { border-radius: 50rem 0 0 50rem; }
.wdw-day.is-end { border-radius: 0 50rem 50rem 0; }
.wdw-day.is-start.is-end { border-radius: 50rem; }
.wdw-day.is-start span, .wdw-day.is-end span, .wdw-day.is-start:hover span, .wdw-day.is-end:hover span { background: var(--bs-primary); color: #fff; }
[data-bs-theme="dark"] .wdw-day.is-start span, [data-bs-theme="dark"] .wdw-day.is-end span { color: #0f1117; }
.wdw-sum { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2); }
.wdw-aurora .btn-light { --bs-btn-color: #1e1b4b; }
@media (max-width: 575.98px) { .wdw-day { height: 44px; } .wdw-day span { width: 40px; height: 40px; } }

function initRangeCalendar() {
  var cal = document.getElementById('wdwCal');
  if (!cal) return;
  var label = document.getElementById('wdwMonthLabel');
  var fromEl = document.getElementById('wdwFrom');
  var toEl = document.getElementById('wdwTo');
  var nightsEl = document.getElementById('wdwNights');
  var totalEl = document.getElementById('wdwTotal');
  var confirmBtn = document.getElementById('wdwConfirm');
  var RATE = 142, DAY = 86400000;
  var now = new Date();
  var view = new Date(now.getFullYear(), now.getMonth(), 1);
  var start = new Date(view.getFullYear(), view.getMonth(), 13);
  var end = new Date(view.getFullYear(), view.getMonth(), 23);
  var anchor = null, dragging = false;

  function key(d) { return d.getFullYear() + '-' + (d.getMonth() + 1) + '-' + d.getDate(); }
  function fmt(d) { return d.toLocaleDateString('en-US', { weekday: 'short', month: 'short', day: 'numeric' }); }
  function setRange(a, b) { if (a <= b) { start = a; end = b; } else { start = b; end = a; } paint(); }

  function build() {
    var y = view.getFullYear(), m = view.getMonth();
    label.textContent = view.toLocaleDateString('en-US', { month: 'long', year: 'numeric' });
    var lead = (new Date(y, m, 1).getDay() + 6) % 7;
    var days = new Date(y, m + 1, 0).getDate();
    var html = '';
    for (var i = 0; i < lead; i++) html += '<button type="button" class="wdw-day is-blank" tabindex="-1" aria-hidden="true"></button>';
    for (var d = 1; d <= days; d++) {
      var date = new Date(y, m, d);
      html += '<button type="button" class="wdw-day' + (key(date) === key(now) ? ' is-today' : '') + '" data-ts="' + date.getTime() + '" aria-pressed="false" aria-label="' + date.toLocaleDateString('en-US', { weekday: 'long', month: 'long', day: 'numeric' }) + '"><span>' + d + '</span></button>';
    }
    cal.innerHTML = html;
    paint();
  }

  function paint() {
    cal.querySelectorAll('.wdw-day[data-ts]').forEach(function (btn) {
      var t = +btn.dataset.ts;
      var s = start && t === start.getTime(), e = end && t === end.getTime();
      var inside = start && end && t >= start.getTime() && t <= end.getTime();
      btn.classList.toggle('in-range', !!inside);
      btn.classList.toggle('is-start', !!s);
      btn.classList.toggle('is-end', !!e);
      btn.setAttribute('aria-pressed', inside ? 'true' : 'false');
    });
    var nights = start && end ? Math.round((end - start) / DAY) : 0;
    fromEl.textContent = start ? fmt(start) : 'Select a date';
    toEl.textContent = end ? fmt(end) : 'Select a date';
    nightsEl.textContent = nights + (nights === 1 ? ' night' : ' nights');
    totalEl.textContent = '$' + (nights * RATE).toLocaleString('en-US');
    confirmBtn.disabled = nights < 1;
  }

  function dayFrom(el) { var b = el && el.closest ? el.closest('.wdw-day[data-ts]') : null; return b ? new Date(+b.dataset.ts) : null; }

  cal.addEventListener('pointerdown', function (e) {
    var d = dayFrom(e.target);
    if (!d) return;
    e.preventDefault();
    if (anchor) { setRange(anchor, d); anchor = null; dragging = false; return; }
    anchor = d; dragging = true; setRange(d, d);
  });
  cal.addEventListener('pointermove', function (e) {
    if (!dragging) return;
    var d = dayFrom(document.elementFromPoint(e.clientX, e.clientY));
    if (d) setRange(anchor, d);
  });
  function release() {
    if (!dragging) return;
    dragging = false;
    if (start.getTime() !== end.getTime()) anchor = null;
  }
  document.addEventListener('pointerup', release);
  document.addEventListener('pointercancel', release);
  cal.addEventListener('click', function (e) {
    if (e.detail !== 0) return; // pointer clicks handled above
    var d = dayFrom(e.target);
    if (!d) return;
    if (anchor) { setRange(anchor, d); anchor = null; } else { anchor = d; setRange(d, d); }
  });

  function shift(n) { view = new Date(view.getFullYear(), view.getMonth() + n, 1); build(); }
  document.getElementById('wdwPrev').addEventListener('click', function () { shift(-1); });
  document.getElementById('wdwNext').addEventListener('click', function () { shift(1); });
  document.getElementById('wdwClear').addEventListener('click', function () { start = end = anchor = null; paint(); });
  confirmBtn.addEventListener('click', function () {
    confirmBtn.textContent = 'Dates reserved';
    setTimeout(function () { confirmBtn.textContent = 'Reserve these dates'; }, 1800);
  });
  build();
}
initRangeCalendar();