# EventHandler.preventDefault

Modifies an `EventHandler` to call `preventDefault()` on the event.

## Signatures

```ts
export declare function preventDefault<Ev extends Event, E = never, R = never>(handler: EventHandler<Ev, E, R>): EventHandler<Ev, E, R>;
```

## Why

This records the policy on the handler while keeping the event native.

## Ownership and lifetime

The returned description is inert; the renderer Scope owns its listener.

## Examples

```ts
import * as EventHandler from "@typed/template/EventHandler"
import { html } from "@typed/template"

const handler = EventHandler.make((event) => {
  console.log("Form submit prevented")
})

const preventDefaultHandler = EventHandler.preventDefault(handler)

const template = html`<form onsubmit=${preventDefaultHandler}>...</form>`
```