---
lang: en
title: 'API docs: openapi-spec-builder.openapispecbuilder.withoperation'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/packages/openapi-spec-builder
permalink: /doc/en/lb4/apidocs.openapi-spec-builder.openapispecbuilder.withoperation.html
---

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[Home](./index.md) &gt; [@loopback/openapi-spec-builder](./openapi-spec-builder.md) &gt; [OpenApiSpecBuilder](./openapi-spec-builder.openapispecbuilder.md) &gt; [withOperation](./openapi-spec-builder.openapispecbuilder.withoperation.md)

## OpenApiSpecBuilder.withOperation() method

Define a new OperationObject at the given path and verb (method).

<b>Signature:</b>

```typescript
withOperation(verb: string, path: string, spec: OperationObject | OperationSpecBuilder): this;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  verb | string | The HTTP verb. |
|  path | string | The path relative to basePath. |
|  spec | OperationObject \| [OperationSpecBuilder](./openapi-spec-builder.operationspecbuilder.md) | Additional specification of the operation. |

<b>Returns:</b>

this