chart JS 2.x:如何在时间线图表中显示工具提示？

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

var ctx = document.getElementById('myChart').getContext('2d');
var chart = new Chart(ctx, {
    type: 'line',
    data: {
        labels: ['2022-01-01', '2022-02-01', '2022-03-01', '2022-04-01'],
        datasets: [{
            label: '数据集1',
            data: [10, 20, 30, 40],
            backgroundColor: 'rgba(0, 123, 255, 0.5)',
            borderColor: 'rgba(0, 123, 255, 1)',
            borderWidth: 1
        }]
    },
    options: {
        tooltips: {
            mode: 'index',
            intersect: false
        }
    }
});