ECharts + Bonnard SDK

Build HTML dashboards with Apache ECharts and the Bonnard SDK. No build step required.

ECharts offers rich interactivity (tooltips, zoom, legend toggling), built-in dark theme, and extensive chart types. Larger payload than Chart.js (~160KB gzip) but more powerful.

Starter template

Copy this complete HTML file as a starting point. Replace bon_pk_YOUR_KEY_HERE with your publishable API key, and update the view/measure/dimension names to match your schema.

Use explore() to discover available views and fields — see Query Reference.

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Dashboard</title>
    <script src="https://cdn.jsdelivr.net/npm/echarts@5/dist/echarts.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/@bonnard/sdk/dist/bonnard.iife.js"></script>
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        background: #09090b;
        color: #fafafa;
        padding: 24px;
      }
      h1 {
        font-size: 24px;
        font-weight: 600;
        margin-bottom: 24px;
      }
      .error {
        color: #ef4444;
        background: #1c0a0a;
        padding: 12px;
        border-radius: 8px;
        margin-bottom: 16px;
        display: none;
      }
      .kpis {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 16px;
        margin-bottom: 32px;
      }
      .kpi {
        background: #18181b;
        border: 1px solid #27272a;
        border-radius: 12px;
        padding: 20px;
      }
      .kpi-label {
        font-size: 14px;
        color: #a1a1aa;
        margin-bottom: 8px;
      }
      .kpi-value {
        font-size: 32px;
        font-weight: 600;
      }
      .kpi-value.loading {
        color: #3f3f46;
      }
      .charts {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
        gap: 24px;
      }
      .chart-card {
        background: #18181b;
        border: 1px solid #27272a;
        border-radius: 12px;
        padding: 20px;
      }
      .chart-title {
        font-size: 16px;
        font-weight: 500;
        margin-bottom: 16px;
      }
      .chart-container {
        height: 300px;
      }
    </style>
  </head>
  <body>
    <h1>Dashboard</h1>
    <div id="error" class="error"></div>

    <div class="kpis">
      <div class="kpi">
        <div class="kpi-label">Revenue</div>
        <div class="kpi-value loading" id="kpi-revenue">--</div>
      </div>
      <div class="kpi">
        <div class="kpi-label">Orders</div>
        <div class="kpi-value loading" id="kpi-orders">--</div>
      </div>
      <div class="kpi">
        <div class="kpi-label">Avg Value</div>
        <div class="kpi-value loading" id="kpi-avg">--</div>
      </div>
    </div>

    <div class="charts">
      <div class="chart-card">
        <div class="chart-title">Revenue by City</div>
        <div class="chart-container" id="bar-chart"></div>
      </div>
      <div class="chart-card">
        <div class="chart-title">Revenue Trend</div>
        <div class="chart-container" id="line-chart"></div>
      </div>
    </div>

    <script>
      const bon = Bonnard.createClient({
        apiKey: "bon_pk_YOUR_KEY_HERE",
      });

      // --- Helpers ---
      function showError(msg) {
        const el = document.getElementById("error");
        el.textContent = msg;
        el.style.display = "block";
      }

      function formatNumber(v) {
        return new Intl.NumberFormat().format(v);
      }

      function formatCurrency(v) {
        return new Intl.NumberFormat("en-US", { style: "currency", currency: "USD", maximumFractionDigits: 0 }).format(
          v,
        );
      }

      // Resize all charts on window resize
      const charts = [];
      window.addEventListener("resize", () => charts.forEach((c) => c.resize()));

      // --- Load data ---
      (async () => {
        try {
          // KPIs
          const kpis = await bon.query({
            measures: ["orders.revenue", "orders.count", "orders.avg_value"],
          });
          if (kpis.data.length > 0) {
            const row = kpis.data[0];
            document.getElementById("kpi-revenue").textContent = formatCurrency(row["orders.revenue"]);
            document.getElementById("kpi-revenue").classList.remove("loading");
            document.getElementById("kpi-orders").textContent = formatNumber(row["orders.count"]);
            document.getElementById("kpi-orders").classList.remove("loading");
            document.getElementById("kpi-avg").textContent = formatCurrency(row["orders.avg_value"]);
            document.getElementById("kpi-avg").classList.remove("loading");
          }

          // Bar chart — revenue by city
          const byCity = await bon.query({
            measures: ["orders.revenue"],
            dimensions: ["orders.city"],
            orderBy: { "orders.revenue": "desc" },
            limit: 10,
          });

          const barChart = echarts.init(document.getElementById("bar-chart"), "dark");
          charts.push(barChart);
          barChart.setOption({
            tooltip: { trigger: "axis", formatter: (p) => `${p[0].name}: ${formatCurrency(p[0].value)}` },
            xAxis: { type: "category", data: byCity.data.map((d) => d["orders.city"]) },
            yAxis: { type: "value", axisLabel: { formatter: (v) => formatCurrency(v) } },
            series: [
              {
                type: "bar",
                data: byCity.data.map((d) => d["orders.revenue"]),
                itemStyle: { color: "#3b82f6", borderRadius: [4, 4, 0, 0] },
              },
            ],
            grid: { left: 80, right: 20, top: 20, bottom: 40 },
          });

          // Line chart — revenue trend
          const trend = await bon.query({
            measures: ["orders.revenue"],
            timeDimension: {
              dimension: "orders.created_at",
              granularity: "month",
              dateRange: "last 12 months",
            },
          });

          const lineChart = echarts.init(document.getElementById("line-chart"), "dark");
          charts.push(lineChart);
          lineChart.setOption({
            tooltip: { trigger: "axis", formatter: (p) => `${p[0].name}: ${formatCurrency(p[0].value)}` },
            xAxis: {
              type: "category",
              data: trend.data.map((d) => {
                const date = new Date(d["orders.created_at"]);
                return date.toLocaleDateString("en-US", { month: "short", year: "2-digit" });
              }),
            },
            yAxis: { type: "value", axisLabel: { formatter: (v) => formatCurrency(v) } },
            series: [
              {
                type: "line",
                data: trend.data.map((d) => d["orders.revenue"]),
                smooth: true,
                itemStyle: { color: "#3b82f6" },
                areaStyle: { color: "rgba(59, 130, 246, 0.15)" },
              },
            ],
            grid: { left: 80, right: 20, top: 20, bottom: 40 },
          });
        } catch (err) {
          showError("Failed to load dashboard: " + err.message);
        }
      })();
    </script>
  </body>
</html>

Chart types

Bar chart

const chart = echarts.init(el, "dark");
chart.setOption({
  xAxis: { type: "category", data: data.map((d) => d["view.dimension"]) },
  yAxis: { type: "value" },
  series: [{ type: "bar", data: data.map((d) => d["view.measure"]) }],
});

Horizontal bar chart

chart.setOption({
  xAxis: { type: "value" },
  yAxis: { type: "category", data: data.map((d) => d["view.dimension"]) },
  series: [{ type: "bar", data: data.map((d) => d["view.measure"]) }],
});

Line chart

chart.setOption({
  xAxis: { type: "category", data: labels },
  yAxis: { type: "value" },
  series: [{ type: "line", data: values, smooth: true }],
});

Area chart

series: [
  {
    type: "line",
    data: values,
    smooth: true,
    areaStyle: { color: "rgba(59, 130, 246, 0.15)" },
  },
];

Pie chart

chart.setOption({
  tooltip: { trigger: "item" },
  series: [
    {
      type: "pie",
      radius: ["40%", "70%"], // doughnut — use '60%' for full pie
      data: data.map((d) => ({
        name: d["view.dimension"],
        value: d["view.measure"],
      })),
    },
  ],
});

Multi-series line chart

const cities = [...new Set(data.map((d) => d["orders.city"]))];
const dates = [...new Set(data.map((d) => d["orders.created_at"]))];

chart.setOption({
  tooltip: { trigger: "axis" },
  legend: { data: cities },
  xAxis: { type: "category", data: dates.map((d) => new Date(d).toLocaleDateString()) },
  yAxis: { type: "value" },
  series: cities.map((city) => ({
    name: city,
    type: "line",
    smooth: true,
    data: dates.map(
      (date) => data.find((d) => d["orders.city"] === city && d["orders.created_at"] === date)?.["orders.revenue"] || 0,
    ),
  })),
});

Dark mode

ECharts has a built-in dark theme — pass 'dark' as the second argument to echarts.init():

const chart = echarts.init(document.getElementById("chart"), "dark");

The dark theme sets appropriate background, text, axis, and tooltip colors automatically.

Resize handling

ECharts charts don't auto-resize. Add a resize listener:

const charts = [];

// After creating each chart:
charts.push(chart);

// Global resize handler:
window.addEventListener("resize", () => charts.forEach((c) => c.resize()));

Color palette

const COLORS = ["#3b82f6", "#22c55e", "#f59e0b", "#ef4444", "#8b5cf6", "#ec4899", "#14b8a6", "#f97316"];

// Apply to a series:
series: data.map((d, i) => ({
  // ...
  itemStyle: { color: COLORS[i % COLORS.length] },
}));