问使用Chart.js注解的垂直线x轴上线性刻度插件

EN

const testConfig = {
    type: 'line',
    data: {
        datasets: [{
            label: 'Test dataset',
            data: [{x: .25, y: 65}, {x: .55, y: 59}, {x: .65, y: 80}, {x: .95, y: 81}, {x: 1, y: 56},
                {x: 1.5, y: 55}, {x: 2, y: 40}],
            fill: false,
            borderColor: 'rgb(75, 192, 192)',
            tension: 0.1
        }]
    },
    options: {
        scales: {
            xAxis: {
                type: 'linear'
            }
        },
        plugins: {
            annotation: {
                annotations: {
                    line1: {
                        type: 'line',
                        scaleId: 'x',
                        value: .55,
                        borderColor: 'rgba(255, 99, 132, 0.25)'
                    }
                }
            }
        }
    }
};
const testChart = new Chart(document.getElementById('testChart').getContext('2d'), testConfig);