# Grouped rows (Timeline example)

> WestCoast Charts 1.1.5, release, public Core release, on npm. HTML: https://westcoast-charts.com/gallery/timeline/multi-series-group-rows/ · Index for agents: https://westcoast-charts.com/llms.txt

Several people per row, coloured by role (rangeBarGroupRows).

- Chart type: `rangeBar` (Range Bar)
- Collection: Timeline · Timeline / range bar
- Raw configuration: https://westcoast-charts.com/gallery-src/timeline/multi-series-group-rows.js
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/gallery/timeline/multi-series-group-rows.html

## Setup

```js
import WestCoastCharts from 'west-coast-charts'
```

## Options

```js
const options = {
  chart: {
    height: 380,
    fontFamily: "Inter, Geist, \"IBM Plex Sans\", system-ui, sans-serif",
    type: "rangeBar",
    toolbar: {
      show: false
    }
  },
  series: [
    {
      name: "Chair",
      data: [
        {
          x: "Board",
          y: [1388534400000, 1546300800000]
        },
        {
          x: "Board",
          y: [1546300800000, 1767225600000]
        }
      ]
    },
    {
      name: "Treasurer",
      data: [
        {
          x: "Finance",
          y: [1420070400000, 1609459200000]
        },
        {
          x: "Finance",
          y: [1609459200000, 1767225600000]
        }
      ]
    },
    {
      name: "Secretary",
      data: [
        {
          x: "Office",
          y: [1388534400000, 1483228800000]
        },
        {
          x: "Office",
          y: [1483228800000, 1672531200000]
        },
        {
          x: "Office",
          y: [1672531200000, 1767225600000]
        }
      ]
    }
  ],
  plotOptions: {
    bar: {
      horizontal: true,
      barHeight: "50%",
      rangeBarGroupRows: true
    }
  },
  xaxis: {
    type: "datetime"
  },
  fill: {
    type: "solid"
  },
  legend: {
    position: "right"
  },
  title: {
    text: "Association roles over the years"
  },
  theme: {
    mode: "light",
    preset: "coastal"
  }
}

const chart = new WestCoastCharts(document.querySelector('#chart'), options)
await chart.render()
```

## Verify

- Text check (Library 1.1.5): load `west-coast-charts/agent/describe` and call `chart.describe({ format: "json" })` for the actual drawn state. The live reader is on this example’s HTML page.
- Command line (Public agent tools 0.2.3, tested with Library 1.1.5; available from the versioned GitHub release and npm, https://westcoast-charts.com/docs/cli/index.md): `wcc chart export timeline-multi-series-group-rows.json --out timeline-multi-series-group-rows.svg --with-table` (save the options above as JSON first)