chartjs:圆环图onHover获取标签和数据

var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
    type: 'doughnut',
    data: {
        labels: ['标签1', '标签2', '标签3'],
        datasets: [{
            data: [10, 20, 30],
            backgroundColor: ['#ff6384', '#36a2eb', '#ffce56']
        }]
    },
    options: {
        onHover: function(event, elements) {
            if (elements.length > 0) {
                var index = elements[0]._index;
                var label = myChart.data.labels[index];
                var value = myChart.data.datasets[0].data[index];
                console.log('悬停的标签：', label);
                console.log('悬停的数据：', value);
            }
        }
    }
});