---
lang: en
title: 'API docs: openapi-v3.visibility'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/packages/openapi-v3
permalink: /doc/en/lb4/apidocs.openapi-v3.visibility.html
---

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[Home](./index.md) &gt; [@loopback/openapi-v3](./openapi-v3.md) &gt; [visibility](./openapi-v3.visibility.md)

## visibility() function

Marks an api path with the specfied visibility. When applied to a class, this decorator marks all paths with the specified visibility.

You can optionally mark all controllers in a class with `@visibility('undocumented')`<!-- -->, but use `@visibility('documented')` on a specific method to ensure it is not marked as `undocumented`<!-- -->.

<b>Signature:</b>

```typescript
export declare function visibility(visibilityType: OperationVisibility): (target: any, method?: string | undefined, methodDescriptor?: TypedPropertyDescriptor<any> | undefined) => any;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  visibilityType | [OperationVisibility](./openapi-v3.operationvisibility.md) |  |

<b>Returns:</b>

(target: any, method?: string \| undefined, methodDescriptor?: TypedPropertyDescriptor&lt;any&gt; \| undefined) =&gt; any

## Example


```ts
@oas.visibility('undocumented')
class MyController {
  @get('/greet')
  async function greet() {
    return 'Hello, World!'
  }

  @get('/greet-v2')
  @oas.deprecated('documented')
  async function greetV2() {
    return 'Hello, World!'
  }
}

class MyOtherController {
  @get('/echo')
  async function echo() {
    return 'Echo!'
  }
}

```