Skip to content

Main Navigation Documentation API Reference GitHub

English

Português (BR)

English

Português (BR)

Appearance

Sidebar Navigation

Overview

Index

Decorators

Module

Controller

Global

Injectable

Inject

Optional

Catch

Header

HttpCode

Middleware

Schema

SetMetadata

UseGuards

UseInterceptors

applyDecorators

createParamDecorator

WebSocket

WebSocketGateway

OnOpen

OnMessage

OnClose

HTTP Methods

Get

Post

Put

Patch

Delete

All

Head

Options

Parameter Decorators

Body

Param

Query

Headers

Req

Request

Res

Response

Ip

Ctx

Session

Exceptions

HttpException

BadRequestException

ForbiddenException

NotFoundException

UnauthorizedException

Classes

Logger

ConsoleLogger

ModuleRef

Reflector

Container

HttpAdapterHost

StreamableFile

ConfigurableModuleBuilder

Interfaces

CanActivate

ExceptionFilter

PipeTransform

NestInterceptor

CallHandler

ExecutionContext

ElysiaNestMiddleware

ModuleMetadata

DynamicModule

OnModuleInit

OnApplicationBootstrap

OnModuleDestroy

BeforeApplicationShutdown

Enumerations

HttpStatus

Scope

Application

createElysiaApplication

createElysiaPlugin

addGlobalExceptionFilter

forwardRef

Scheduler

README

ScheduleModule

SchedulerRegistry

CronExpressions

@Cron

@Interval

@Timeout

@ScheduleAt

Microservices

README

ElysiaNestApplication

ClientProxy

BaseServer

TcpClient

TcpServer

RedisClient

RedisServer

Transport

Apollo / GraphQL

README

GraphQLModule

@Resolver

@Query

@Mutation

@Subscription

@ObjectType

@Field

@Args

Passport

README

AuthGuard

PassportStrategy

Cache

README

CacheModule

Cache

CacheInterceptor

@CacheKey

@CacheTTL

RabbitMQ

README

RabbitMQModule

AmqpConnection

@RabbitSubscribe

@RabbitRPC

GraphQL PubSub

README

GraphQLPubSubModule

RedisPubSub

Testing

README

Test

TestingModule

TestingModuleBuilder

Drizzle

DrizzleModule

InjectDrizzle

DRIZZLE_INSTANCE

DrizzleModuleOptions

DrizzleModuleAsyncOptions

On this page

Function: Optional()

ts

function Optional(): ParameterDecorator;

Defined in: packages/core/src/di/injectable.decorator.ts:54

Returns

ParameterDecorator

Edit this page on GitHub

Pager

Previous pageInject

Released under the MIT License.