[[features.websockets]]
== WebSockets
Spring Boot provides WebSockets auto-configuration for embedded Tomcat, Jetty, and Undertow.
If you deploy a war file to a standalone container, Spring Boot assumes that the container is responsible for the configuration of its WebSocket support.

Spring Framework provides {spring-framework-docs}/web.html#websocket[rich WebSocket support] for MVC web applications that can be easily accessed through the `spring-boot-starter-websocket` module.

WebSocket support is also available for {spring-framework-docs}/web-reactive.html#webflux-websocket[reactive web applications] and requires to include the WebSocket API alongside `spring-boot-starter-webflux`:

[source,xml,indent=0,subs="verbatim"]
----
	<dependency>
		<groupId>javax.websocket</groupId>
		<artifactId>javax.websocket-api</artifactId>
	</dependency>
----