Package com.vaadin.flow.js

Annotation Interface JsDefinition

@Documented
@Target(TYPE)
@Retention(RUNTIME)
public @interface JsDefinition

Marks an interface whose methods declare the JavaScript they run with JsExpression, to be called through Element.executeJs(Class).

The annotation is what makes the interface findable during the build: every annotated interface is collected into the generated bundle as a function per method, so the JavaScript an application can invoke from the server is known before it runs and the client never has to build a function from a string. That is what keeps a server-initiated call compatible with a content security policy that does not allow unsafe-eval.

See Also:

• JsExpression
• Element.executeJs(Class)