Northstar bubble matrix

<!-- Original layout, SVG/CSS artwork and JavaScript © 2026 XXC Templates. MIT License.
Illustrative sample content and data; no real accounts, purchases or bookings. -->
<main>
  <header class="intro">
    <div>
      <div class="kicker">DATA STORIES / SAMPLE DATA</div>
      <h1>Northstar bubble matrix</h1>
      <p>
        A three-variable comparison: retention on X, activation on Y, and customer count by bubble
        area. Focus on one segment at a time.
      </p>
    </div>
    <span class="badge">INTERACTIVE SVG</span>
  </header>
  <section class="panel">
    <svg
      id="chart"
      viewBox="0 0 700 310"
      role="img"
      aria-label="Activation versus retention bubble chart"
    ></svg>
    <div class="toolbar">
      <button id="change">Focus enterprise segment</button
      ><span class="badge">BUBBLE AREA = CUSTOMER COUNT</span>
    </div>
    <output id="status" class="status" aria-live="polite"></output>
    <details class="data-table">
      <summary>View data table</summary>
      <div class="table-scroll"><table id="data-table"></table></div>
    </details>
  </section>
  <footer>Illustrative data · no external services · keyboard-accessible controls</footer>
</main>

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(() => {
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  const $ = (s) => document.querySelector(s),
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    status = (t) => {
      const el = $("#status");
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    return el;
  }
  function table(headers, rows) {
    const t = $("#data-table");
    if (!t) return;
    t.replaceChildren();
    const caption = document.createElement("caption");
    caption.textContent = "Illustrative sample data";
    t.append(caption);
    const head = t.createTHead().insertRow();
    headers.forEach((v) => {
      const th = document.createElement("th");
      th.scope = "col";
      th.textContent = v;
      head.append(th);
    });
    const body = t.createTBody();
    rows.forEach((row) => {
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      row.forEach((v) => (r.insertCell().textContent = String(v)));
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  function selectButtons(selector, callback) {
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        $$(selector).forEach((x) => x.setAttribute("aria-pressed", String(x === b)));
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  }

  const colors = ["#82b6ff", "#72dbc2", "#c5a4ff", "#f7bf7c", "#fa92b8", "#acd884"];
  const data = [
    ["Launch", 44, 38, 90, "startup"],
    ["Studio", 62, 57, 150, "startup"],
    ["Teams", 74, 69, 240, "enterprise"],
    ["Scale", 83, 78, 310, "enterprise"],
    ["Creator", 57, 76, 110, "startup"],
    ["Global", 89, 54, 180, "enterprise"],
  ];
  let focus = false;
  function draw() {
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    s.replaceChildren();
    for (let n = 20; n <= 100; n += 20) {
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        role: "button",
        "aria-label":
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          ": " +
          count +
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          x +
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          y +
          " percent activation",
      });
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        status(name + ": " + count + " customers · retention " + x + "% · activation " + y + "%.");
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          e.preventDefault();
          report();
        }
      });
      s.append(p);
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            x: 55 + x * 6,
            y: 267 - y * 2.4 + 4,
            "text-anchor": "middle",
            style: "fill:var(--text)",
          },
          name,
        ),
      );
    });
    s.append(svg("text", { x: 350, y: 307, "text-anchor": "middle" }, "Retention →"));
    table(["Plan", "Retention %", "Activation %", "Customers", "Segment"], data);
  }
  $("#change").addEventListener("click", () => {
    focus = !focus;
    draw();
    status(
      focus
        ? "Enterprise plans highlighted; axes and area scale unchanged."
        : "All customer segments shown.",
    );
  });
  draw();
})();