这是我的图表代码，我的X轴值正确，但Y轴值不工作

<script>

    const config = {
        type: 'line',
        data: {
            datasets: [{
                data: <%=lineData%>
            }]
        },
        options: {
            scales: {
                yAxes: [{
                    ticks: {
                        beginAtZero: true,
                        stepSize: 2
                    }
                }]
            }
        }

    };
</script>

<script>
const myChart = new Chart(
    document.getElementById('myChart'),
    config
);
</script>

and this is my chart,
debugged value is correct but they does not on my chart