# Link

class in `closed-chain-ik/core`, extends `Frame`

```js
import { Link } from 'closed-chain-ik/core';
```

A frame modeling a fixed connection between joints. Only joints may be added as children.

## Properties

### .closureJoints: Array<Joint>

readonly

Joints connected to this link through `Joint.makeClosure`.

## Methods

### .addChild

```js
.addChild( child: Joint )
```

Adds a joint as a child of this link. Throws if the child is not a joint.

- `child`, `Joint`