@loopback/docs

--- lang: en title: 'API docs: openapi-spec-builder.openapispecbuilder' keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI sidebar: lb4_sidebar editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/openapi-spec-builder permalink: /doc/en/lb4/apidocs.openapi-spec-builder.openapispecbuilder.html ---  [Home](./index.md) > [@loopback/openapi-spec-builder](./openapi-spec-builder.md) > [OpenApiSpecBuilder](./openapi-spec-builder.openapispecbuilder.md) ## OpenApiSpecBuilder class A builder for creating OpenApiSpec documents. **Signature:** ```typescript export declare class OpenApiSpecBuilder extends BuilderBase<OpenAPIObject> ``` **Extends:** [BuilderBase](./openapi-spec-builder.builderbase.md)<OpenAPIObject> ## Constructors <table><thead><tr><th> Constructor </th><th> Modifiers </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [(constructor)()](./openapi-spec-builder.openapispecbuilder._constructor_.md) </td><td markdown="1"> </td><td markdown="1"> Constructs a new instance of the `OpenApiSpecBuilder` class </td></tr> </tbody></table> ## Methods <table><thead><tr><th> Method </th><th> Modifiers </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [withComponents(spec)](./openapi-spec-builder.openapispecbuilder.withcomponents.md) </td><td markdown="1"> </td><td markdown="1"> Define a new ComponentsObject. </td></tr> <tr><td markdown="1"> [withOperation(verb, path, spec)](./openapi-spec-builder.openapispecbuilder.withoperation.md) </td><td markdown="1"> </td><td markdown="1"> Define a new OperationObject at the given path and verb (method). </td></tr> <tr><td markdown="1"> [withOperationReturningString(verb, path, operationName)](./openapi-spec-builder.openapispecbuilder.withoperationreturningstring.md) </td><td markdown="1"> </td><td markdown="1"> Define a new operation that returns a string response. </td></tr> </tbody></table>