# add

Adds a new route to a router module.

## Usage

```ts twoslash
/// <reference types="node" />
// ---cut---
import { createApp } from "@deroll/app";
import { createRouter } from "@deroll/router";

// create app
const app = createApp();

// create router
const router = createRouter({ app });
router.add<{ name: string }>( // [!code focus]
    "hello/:name", // [!code focus]
    ({ params: { name } }) => `Hello ${name}`, // [!code focus]
); // [!code focus]

app.addInspectHandler(router.handler);

// start app
app.start().catch((e) => process.exit(1));
```

## Returns

Type: `Route<P>`

```ts
type Route<P extends object> = {
    matcher: MatchFunction<P>;
    handler: Handler<P>;
};
```

## Parameters

Type: `string`

URL of route.

Type: `Handler`

```ts
type Handler<P extends object = object> = (
    match: MatchResult<P>,
    matchedRoute: Route<P>,
) => string;
```