如何使用Daniel Gindi的图表库在同一个轴上拥有相同类型(即LineChart)的图表？

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>

<canvas id="myChart"></canvas>

var ctx = document.getElementById('myChart').getContext('2d');

var data = {
    labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
    datasets: [{
        label: 'Dataset 1',
        data: [10, 20, 30, 40, 50, 60, 70],
        borderColor: 'red',
        fill: false
    }, {
        label: 'Dataset 2',
        data: [20, 30, 40, 50, 60, 70, 80],
        borderColor: 'blue',
        fill: false
    }]
};

var myChart = new Chart(ctx, {
    type: 'line',
    data: data
});

myChart.options = {
    title: {
        display: true,
        text: 'My Chart'
    },
    scales: {
        xAxes: [{
            display: true,
            scaleLabel: {
                display: true,
                labelString: 'Month'
            }
        }],
        yAxes: [{
            display: true,
            scaleLabel: {
                display: true,
                labelString: 'Value'
            }
        }]
    },
    legend: {
        display: true,
        position: 'top'
    }
};

myChart.update();