# Donut update (Pie example)

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

Buttons add, remove and randomise segments.

- Chart type: `donut` (Donut)
- Collection: Pie · Pie & donut
- Raw configuration: https://westcoast-charts.com/gallery-src/pie/donut-update.js
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/gallery/pie/donut-update.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: "donut",
    toolbar: {
      show: false
    }
  },
  series: [44, 55, 13, 33],
  labels: ["A", "B", "C", "D"],
  title: {
    text: "Live share"
  },
  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 pie-donut-update.json --out pie-donut-update.svg --with-table` (save the options above as JSON first)