economy/wwwroot/js/price-chart.js

class PriceChart {
    constructor() {
        const el = document.getElementById("priceChartData");
        if (!el || typeof Chart === "undefined") {
            return;
        }

        const data = JSON.parse(el.textContent);

        new Chart(document.getElementById("priceChart"), {
            type: "line",
            data: {
                labels: data.labels,
                datasets: data.series.map((s) => ({
                    label: s.name,
                    data: s.values,
                    borderWidth: 2,
                    pointRadius: 2,
                    tension: 0.2,
                    spanGaps: true
                }))
            },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                plugins: {
                    legend: { display: data.series.length > 1 }
                },
                scales: {
                    y: { beginAtZero: false }
                }
            }
        });
    }
}

const priceChart = new PriceChart();