## createPatch() function  
Produce a 'application/json-patch+json'-type patch to get from one object to another.

This does not alter `input` or `output` unless they have a property getter with side-effects (which is not a good idea anyway).

`diff` is called on each pair of comparable non-primitive nodes in the `input`/`output` object trees, producing nested patches. Return `undefined` to fall back to default behaviour.

Returns list of operations to perform on `input` to produce `output`.

**Signature:**  
```typescript
export declare function createPatch(input: any, output: any, diff?: VoidableDiff): Operation[];
```

## Parameters  
| Parameter | Type | Description |  
| --- | --- | --- |  
| input | any | The input value. |  
| output | any | The target value. |  
| diff | [VoidableDiff](/content/docs/sdk/core.voidablediff) | _(Optional)_ Optional diff function. |

**Returns:**  
[Operation](/content/docs/sdk/core.operation)

The list of patch operations.

- [createPatch() function](/content/docs/sdk/core.createpatch#createpatch-function/index.html)  
- [Parameters](/content/docs/sdk/core.createpatch#parameters/index.html)