External URLs, and any links that don't require a route navigation using `/pages`, don't need to be handled with `Link`; use the anchor tag for such cases instead.
A `Link` to a dynamic route is a combination of the `href` and `as` props. A link to the page `pages/post/[pid].js` will look like this:
```jsx
<Linkhref="/post/[pid]"as="/post/abc">
<a>First Post</a>
</Link>
```
`href` is a file system path used by the page and it shouldn't change at runtime. `as` on the other hand, will be dynamic most of the time according to your needs. Here's an example of how to create a list of links:
```jsx
const pids = ['id1', 'id2', 'id3']
{
pids.map(pid => (
<Linkhref="/post/[pid]"as={`/post/${pid}`}>
<a>Post {pid}</a>
</Link>
))
}
```
## Example with `React.forwardRef`
If the child component in `Link` is a function component, you'll need to wrap it in [`React.forwardRef`](https://reactjs.org/docs/react-api.html#reactforwardref) like in the following example:
```jsx
import React from 'react'
import Link from 'next/link'
// `onClick`, `href`, and `ref` need to be passed to the DOM element
The above example will be a link to `/about?name=ZEIT`. You can use every property as defined in the [Node.js URL module documentation](https://nodejs.org/api/url.html#url_url_strings_and_url_objects).
The default behavior of the `Link` component is to `push` a new URL into the `history` stack. You can use the `replace` prop to prevent adding a new entry, as in the following example:
```jsx
<Linkhref="/about"replace>
<a>About us</a>
</Link>
```
## Using a component that supports `onClick`
`Link` supports any component that supports the `onClick` event, in the case you don't provide an `<a>` tag, consider the following example:
```jsx
<Linkhref="/about">
<imgsrc="/static/image.png"alt="image"/>
</Link>
```
The child of `Link` is `<img>` instead of `<a>`. `Link` will send the `onClick` property to `<img>` but won't pass the `href` property.
## Forcing `Link` to expose `href` to its child
If the child is an `<a>` tag and doesn't have a `href` attribute we specify it so that the repetition is not needed by the user. However, sometimes, you’ll want to pass an `<a>` tag inside of a wrapper and `Link` won’t recognize it as a _hyperlink_, and, consequently, won’t transfer its `href` to the child.
In cases like that, you can add the `passHref` property to `Link`, forcing it to expose its `href` property to the child. Take a look at the following example:
```jsx
import Link from 'next/link'
import Unexpected_A from 'third-library'
function NavLink({ href, name }) {
return (
<Linkhref={href}passHref>
<Unexpected_A>{name}</Unexpected_A>
</Link>
)
}
export default NavLink
```
> **Please note**: using a tag other than `<a>` and failing to pass `passHref` may result in links that appear to navigate correctly, but, when being crawled by search engines, will not be recognized as links (owing to the lack of `href` attribute). This may result in negative effects on your sites SEO.
## Disable scrolling to the top of the page
The default behavior of `Link` is to scroll to the top of the page. When there is a hash defined it will scroll to the specific id, just like a normal `<a>` tag. To prevent scrolling to the top / hash `scroll={false}` can be added to `Link`: