# Bar Labels (Gantt example)

> WestCoast Charts 1.1.5, release, public Core release, on npm. HTML: https://westcoast-charts.com/gallery/gantt/bar-labels/ · Index for agents: https://westcoast-charts.com/llms.txt

Labels beside or inside the bar (auto by room) with a formatter.

- Chart type: `gantt` (Gantt)
- Collection: Gantt · Gantt
- Raw configuration: https://westcoast-charts.com/gallery-src/gantt/bar-labels.js
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/gallery/premium/gantt/bar-labels.html

## Setup

```js
import WestCoastCharts from 'west-coast-charts'
import types from 'west-coast-charts/types'
import premium from 'west-coast-charts/premium'

WestCoastCharts.use(types).use(premium)
const WestCoastChartsPremium = premium
WestCoastCharts.setLicenseKey(LICENCE_KEY) // paid production licence; localhost evaluation needs no key
```

## Options

```js
const options = {
  chart: {
    height: "auto",
    toolbar: {
      show: false
    },
    type: "gantt"
  },
  series: [
    {
      name: "Discovery",
      data: [
        {
          id: "res",
          x: "Customer interviews",
          y: [1788732000000, 1789682400000],
          progress: 100,
          assignee: "Iris",
          baseline: [1788732000000, 1789509600000]
        },
        {
          id: "req",
          x: "Requirements",
          y: [1789509600000, 1790287200000],
          progress: 100,
          dependsOn: ["res"],
          assignee: "Hugo",
          baseline: [1789336800000, 1790114400000]
        },
        {
          id: "scope",
          x: "Scope sign-off",
          y: 1790546400000,
          milestone: true,
          dependsOn: ["req"]
        }
      ]
    },
    {
      name: "Design",
      data: [
        {
          id: "flows",
          x: "User flows",
          y: [1790546400000, 1791496800000],
          progress: 100,
          dependsOn: ["scope"],
          assignee: "Iris",
          baseline: [1790546400000, 1791324000000]
        },
        {
          id: "visual",
          x: "Visual design",
          y: [1791151200000, 1792533600000],
          progress: 80,
          dependsOn: ["flows"],
          assignee: "Maya",
          baseline: [1790805600000, 1792015200000]
        },
        {
          id: "kit",
          x: "Component kit",
          y: [1790805600000, 1792101600000],
          progress: 65,
          dependsOn: ["scope"],
          assignee: "Maya"
        }
      ]
    },
    {
      name: "Build",
      data: [
        {
          id: "api",
          x: "API & data model",
          y: [1791151200000, 1793314800000],
          progress: 50,
          dependsOn: ["scope"],
          assignee: "Tomas",
          baseline: [1790805600000, 1792969200000]
        },
        {
          id: "web",
          x: "Web client",
          y: [1792360800000, 1794524400000],
          progress: 20,
          dependsOn: ["visual", "kit"],
          assignee: "Kira"
        },
        {
          id: "int",
          x: "Integrations",
          y: [1793574000000, 1794524400000],
          progress: 0,
          dependsOn: ["api"],
          assignee: "Tomas"
        },
        {
          id: "qa",
          x: "QA & hardening",
          y: [1794783600000, 1795734000000],
          progress: 0,
          dependsOn: ["web", "int"],
          assignee: "Nico"
        },
        {
          id: "go",
          x: "Launch",
          y: 1795993200000,
          milestone: true,
          dependsOn: ["qa"]
        }
      ]
    }
  ],
  plotOptions: {
    gantt: {
      today: {
        date: "2026-10-22"
      },
      grid: {
        show: false
      },
      labels: {
        show: true,
        formatter: (name, o) => name + (o.task.assignee ? ' – ' + o.task.assignee : '')
      }
    }
  },
  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 gantt-bar-labels.json --out gantt-bar-labels.svg --with-table` (save the options above as JSON first)