feat: add defineHandle and defineMiddleware type helpers (#47)

README.md

@@ -98,6 +98,8 @@ Instead of adding helpers to `req` and `res`, h3 exposes them as composable util
 - `appendHeader(res, name, value)`
 - `createError({ statusCode, statusMessage, data? }`
 - `sendError(res, error, debug?)`
+- `defineHandle(handle)`
+- `defineMiddleware(middlware)`
 
 👉 You can learn more about usage in [JSDocs Documentation](https://www.jsdocs.io/package/h3#package-functions).
 

src/handle.ts

@@ -1,11 +1,14 @@
 import { withoutTrailingSlash, withoutBase } from 'ufo'
 import type { IncomingMessage, ServerResponse } from './types/node'
 
-export type Handle <T=any> = (req: IncomingMessage, res: ServerResponse) => T
+export type Handle<T = any> = (req: IncomingMessage, res: ServerResponse) => T
 export type PHandle = Handle<Promise<any>>
 export type Middleware = (req: IncomingMessage, res: ServerResponse, next: (err?: Error) => any) => any
 export type LazyHandle = () => Handle | Promise<Handle>
 
+export const defineHandle = <T>(handler: Handle<T>) => handler
+export const defineMiddleware = (middleware: Middleware) => middleware
+
 export function promisifyHandle (handle: Handle | Middleware): PHandle {
   return function (req: IncomingMessage, res: ServerResponse) {
     return callHandle(handle, req, res)