---
title: Pattern.addPart()
---

The `Pattern.addPart()` method allows you to add a part to a pattern.
It has the same effect as passing a part to the Design constructor.

:::note
This method is chainable as it returns the Pattern object
:::

## Pattern.addPart() signature

```js
Pattern pattern.addPart(object part)
```

## Pattern.addPart() example

```js
import { Aaron } from '@freesewing/aaron'

const extra = {
  name: 'aaron.extra',
  draft: ({ points, Point, paths, Path, part }) => {
    points.msg = new Point(50, 15).attr('data-text', 'I am an extra part')
    paths.box = new Path()
      .move(new Point(0, 0))
      .line(new Point(0, 30))
      .line(new Point(100, 30))
      .line(new Point(100, 0))
      .close(new Point(100, 0))
      .addClass('note')

    return part
  },
}

// Load some public test measurements from the FreeSewing backend
const measurements = (
  await (await fetch('https://backend3.freesewing.org/curated-sets/1.json')).json()
).measurements

const pattern = new Aaron({ measurements }).addPart(extra)

const svg = pattern.draft().render()
```