Sample

by Black Label

HTML

<script src="https://code.highcharts.com/gantt/highcharts.js"></script>
<script src="https://code.highcharts.com/gantt/modules/gantt.js"></script>

<div id="container"></div>

CSS

#container {
    max-width: 800px;
    margin: 1em auto;
    height: 500px;
}

JavaScript

Highcharts.ganttChart('container', {
  yAxis: {
    categories: ['1', '', '2']
  },
  series: [{
    groupPadding: 1,
    type: 'line',
    data: [{
      y: 0,
      x: Date.UTC(2022, 10, 18),
    }, {
      y: 0,
      x: Date.UTC(2022, 10, 25, 12),
    }]
  }, {}, {
    type: 'line',
    data: [{
      y: 2,
      x: Date.UTC(2022, 10, 18),
    }, {
      y: 2,
      x: Date.UTC(2022, 10, 25, 12),
    }]
  }]
});