More utils

Base

withBase(base, input)

Returns a new event handler that removes the base url of the event before calling the original handler.

Example:

const api = new H3()
 .get("/", () => "Hello API!");
const app = new H3();
 .use("/api/**", withBase("/api", api.handler));

Event

getEventContext(event)

Gets the context of the event, if it does not exists, initializes a new context on req.context.

isEvent(input)

Checks if the input is an H3Event object.

isHTTPEvent(input)

Checks if the input is an object with { req: Request } signature.

mockEvent(_request, options?)

Middleware

bodyLimit(limit)

Define a middleware that checks whether request body size is within specified limit.

If body size exceeds the limit, throws a 413 Request Entity Too Large response error. If you need custom handling for this case, use assertBodySize instead.

onError(hook)

Define a middleware that runs when an error occurs.

You can return a new Response from the handler to gracefully handle the error.

onRequest(hook)

Define a middleware that runs on each request.

onResponse(hook)

Define a middleware that runs after Response is generated.

You can return a new Response from the handler to replace the original response.

WebSocket

defineWebSocket(hooks)

Define WebSocket hooks.

defineWebSocketHandler()

Define WebSocket event handler.

Adapters

defineNodeHandler(handler)

defineNodeMiddleware(handler)

fromNodeHandler(handler)

fromWebHandler()