将事件处理程序附加到nvd3图表的标签

var data = [
  {
    key: "Series 1",
    values: [
      { x: 0, y: 1 },
      { x: 1, y: 2 },
      { x: 2, y: 3 },
      // ...
    ]
  }
];

nv.addGraph(function() {
  var chart = nv.models.lineChart();

  chart.xAxis
    .axisLabel("X-axis Label");

  chart.yAxis
    .axisLabel("Y-axis Label");

  d3.select("#chart-container svg")
    .datum(data)
    .call(chart);

  // Attach event handler to the chart label
  d3.select("#chart-container svg .nv-x .tick text")
    .on("click", function(d, i) {
      // Handle the click event
      console.log("Label clicked:", d, i);
    });

  nv.utils.windowResize(chart.update);

  return chart;
});