如何在plotly js中创建水平阈值线？

var trace1 = {
  x: [1, 2, 3, 4, 5],
  y: [1, 3, 2, 3, 1],
  mode: 'lines',
  name: 'Data',
};

var trace2 = {
  x: [1, 2, 3, 4, 5],
  y: [2, 2, 2, 2, 2],
  mode: 'lines',
  name: 'Threshold',
};

var data = [trace1, trace2];

var layout = {
  shapes: [
    {
      type: 'line',
      x0: 0,
      y0: 2,
      x1: 5,
      y1: 2,
      line: {
        color: 'red',
        width: 2,
        dash: 'dashdot',
      },
    },
  ],
};

Plotly.newPlot('myDiv', data, layout);