Bootstrap 5 Ping Card with Live Latency Sparkline

<section class="wdw-stage">
  <div class="container" style="max-width:900px">
    <div class="wdw-card overflow-hidden">
      <div class="row g-0">
        <div class="col-md-6 wdw-aurora p-4 p-md-5 d-flex flex-column ping-panel">
          <div class="d-flex align-items-center justify-content-between mb-3">
            <span class="d-inline-flex align-items-center gap-2 fw-semibold">
              <span class="position-relative d-inline-flex" aria-hidden="true">
                <span class="static-dot bg-success" data-paused-dot></span>
                <span class="spinner-grow spinner-grow-sm text-success position-absolute top-0 start-0" data-live-dot></span>
              </span>
              Ping
            </span>
            <span class="badge rounded-pill bg-success-subtle text-success-emphasis border border-success-subtle" data-ping-state>Excellent</span>
          </div>
          <div class="d-flex align-items-baseline gap-2 mb-2">
            <span class="ping-value" data-ping-value>24</span>
            <span class="fs-5 fw-semibold opacity-75">ms</span>
          </div>
          <svg class="ping-spark mt-auto" viewBox="0 0 200 56" preserveAspectRatio="none" role="img" aria-label="Latency over the last 20 samples: 24 ms, excellent" data-spark>
            <path data-spark-area d="" fill="rgba(255,255,255,.14)"/>
            <path data-spark-line d="" fill="none" stroke="#fff" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" vector-effect="non-scaling-stroke"/>
          </svg>
        </div>
        <div class="col-md-6 p-4 p-md-5 d-flex flex-column gap-3">
          <div>
            <span class="wdw-eyebrow">Network status</span>
            <h2 class="wdw-heading h4 mb-0">Connection health</h2>
          </div>
          <dl class="row g-3 mb-0" aria-live="off">
            <div class="col-6"><dt class="wdw-muted small fw-medium">Average</dt><dd class="h5 mb-0 fw-bold"><span data-stat="avg">24</span> ms</dd></div>
            <div class="col-6"><dt class="wdw-muted small fw-medium">Peak</dt><dd class="h5 mb-0 fw-bold"><span data-stat="max">24</span> ms</dd></div>
            <div class="col-6"><dt class="wdw-muted small fw-medium">Jitter</dt><dd class="h5 mb-0 fw-bold"><span data-stat="jitter">0</span> ms</dd></div>
            <div class="col-6"><dt class="wdw-muted small fw-medium">Packet loss</dt><dd class="h5 mb-0 fw-bold"><span data-stat="loss">0</span>%</dd></div>
          </dl>
          <div class="d-flex gap-2 mt-auto pt-3 flex-wrap">
            <button type="button" class="btn btn-primary rounded-pill flex-fill" data-ping-toggle aria-pressed="true">Pause</button>
            <button type="button" class="btn btn-outline-secondary info-btn rounded-pill" data-bs-toggle="tooltip" data-bs-title="Round-trip time to the nearest server. Under 50 ms feels instant.">
              <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" aria-hidden="true"><circle cx="12" cy="12" r="9"/><path d="M12 11v5M12 8h.01"/></svg>
              Info
            </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 */
.ping-panel { min-height: 440px; }
.ping-value { font-size: clamp(4rem, 12vw, 5.5rem); font-weight: 800; letter-spacing: -.04em; line-height: 1; font-variant-numeric: tabular-nums; }
.ping-spark { width: 100%; height: 96px; display: block; }
.static-dot { width: .5rem; height: .5rem; border-radius: 50%; display: inline-block; }
.info-btn { --bs-btn-color: var(--bs-body-color); --bs-btn-border-color: var(--bs-border-color); --bs-btn-hover-color: var(--bs-body-color); --bs-btn-hover-bg: var(--bs-tertiary-bg); --bs-btn-hover-border-color: var(--bs-secondary-color); --bs-btn-active-color: var(--bs-body-color); --bs-btn-active-bg: var(--bs-tertiary-bg); --bs-btn-active-border-color: var(--bs-secondary-color); }
.static-dot { width: .5rem; height: .5rem; }
.static-dot.is-paused { background: var(--bs-secondary) !important; }
[data-live-dot] { --bs-spinner-width: .5rem; --bs-spinner-height: .5rem; }

(function () {
  function initPing() {
    var root = document.querySelector('.ping-panel');
    if (!root) return;
    var valueEl = root.querySelector('[data-ping-value]');
    var stateEl = root.querySelector('[data-ping-state]');
    var line = root.querySelector('[data-spark-line]');
    var area = root.querySelector('[data-spark-area]');
    var spark = root.querySelector('[data-spark]');
    var liveDot = root.querySelector('[data-live-dot]');
    var pausedDot = root.querySelector('[data-paused-dot]');
    var btn = document.querySelector('[data-ping-toggle]');
    var stat = function (k) { return document.querySelector('[data-stat="' + k + '"]'); };
    var reduce = window.matchMedia && window.matchMedia('(prefers-reduced-motion: reduce)').matches;
    var DOMAIN = 100;
    var samples = [];
    for (var i = 0; i < 20; i++) samples.push(20 + Math.round(Math.random() * 14));
    var timer = null;
    var loss = 0;
    var STATES = {
      Excellent: 'bg-success-subtle text-success-emphasis border-success-subtle',
      Good: 'bg-warning-subtle text-warning-emphasis border-warning-subtle',
      Slow: 'bg-danger-subtle text-danger-emphasis border-danger-subtle'
    };
    function draw() {
      var pts = samples.map(function (v, i) { return [i * (200 / 19), 52 - (Math.min(v, DOMAIN) / DOMAIN) * 48]; });
      var d = pts.map(function (p, i) { return (i ? 'L' : 'M') + p[0].toFixed(1) + ' ' + p[1].toFixed(1); }).join(' ');
      line.setAttribute('d', d);
      area.setAttribute('d', d + ' L200 56 L0 56 Z');
      var cur = samples[samples.length - 1];
      var min = Math.min.apply(null, samples), max = Math.max.apply(null, samples);
      var avg = Math.round(samples.reduce(function (a, b) { return a + b; }, 0) / samples.length);
      var state = cur < 40 ? 'Excellent' : cur < 80 ? 'Good' : 'Slow';
      valueEl.textContent = cur;
      stateEl.textContent = state;
      stateEl.className = 'badge rounded-pill border ' + STATES[state];
      spark.setAttribute('aria-label', 'Latency over the last 20 samples: ' + cur + ' ms, ' + state.toLowerCase());
      stat('avg').textContent = avg;
      stat('max').textContent = max;
      stat('jitter').textContent = Math.round((max - min) / 2);
      stat('loss').textContent = loss.toFixed(1).replace('.0', '');
    }
    function tick() {
      var last = samples[samples.length - 1];
      var next = Math.max(12, Math.min(120, last + Math.round((Math.random() - 0.5) * 18)));
      loss = next >= 80 ? 2.5 : next >= 40 ? 0.5 : 0;
      samples.push(next); samples.shift(); draw();
    }
    function setRunning(on) {
      clearInterval(timer);
      timer = on ? setInterval(tick, reduce ? 4000 : 1200) : null;
      btn.textContent = on ? 'Pause' : 'Resume';
      btn.setAttribute('aria-pressed', String(on));
      liveDot.classList.toggle('d-none', !on);
      pausedDot.classList.toggle('is-paused', !on);
    }
    btn.addEventListener('click', function () { setRunning(!timer); });
    draw();
    setRunning(true);
  }
  function initTooltips() {
    document.querySelectorAll('[data-bs-toggle="tooltip"]').forEach(function (el) { new bootstrap.Tooltip(el); });
  }
  initPing();
  initTooltips();
})();