# Spline area (Area example)

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

Two overlapping smooth areas.

- Chart type: `area` (Area)
- Collection: Area · Area
- Raw configuration: https://westcoast-charts.com/gallery-src/area/area-spline.js
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/gallery/area/area-spline.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: "area",
    toolbar: {
      show: false
    }
  },
  series: [
    {
      name: "Web",
      data: [40, 43, 42, 40, 42, 43, 39, 43, 42, 40, 36, 40]
    },
    {
      name: "App",
      data: [24, 21, 19, 22, 27, 30, 30, 31, 32, 33, 33, 38]
    }
  ],
  xaxis: {
    categories: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
  },
  dataLabels: {
    enabled: false
  },
  stroke: {
    curve: "smooth",
    width: 2
  },
  title: {
    text: "Sessions by platform (k)"
  },
  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 area-area-spline.json --out area-area-spline.svg --with-table` (save the options above as JSON first)