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doc'd fs-routing option & added note on passHref (#3384)

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2 changes:

`passHref` - just added a cautionary note on the importance of `passHref`. We had a few days of no-href links on our site b/c we used a custom component instead of a raw `<a>` tag,  and Google bot wasn't crawling our links (confirmed in Google cache). Hurt our SEO a bit, so I thought it was worth noting.


`useFileSystemPublicRoutes` - this is mentioned in https://github.com/zeit/next.js/pull/914 , but it doesn't appear any doc was actually added. We use `next-routes`, and we were serving all the files in `/pages/` in addition to their route patterns (ie duplicate content), which can be a pain w/ SEO and duplicate content.
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brandon 2017-12-03 18:01:48 -05:00 committed by Tim Neutkens
parent 3a651971e1
commit 64c69866fe
1 changed files with 17 additions and 0 deletions
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@ -403,6 +403,8 @@ export default () =>
If 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 the `Link` won’t recognize it as a *hyperlink*, and, consequently, won’t transfer its `href` to the child. In cases like that, you should define a boolean `passHref` property to the `Link`, forcing it to expose its `href` property to the child.
**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.
```jsx
import Link from 'next/link'
import Unexpected_A from 'third-library'
@ -730,6 +732,21 @@ Supported options:
Then, change your `start` script to `NODE_ENV=production node server.js`.
#### Disabling file-system routing
By default, `Next` will serve eacy file in `/pages` under a pathname matching the filename (eg, `/pages/some-file.js` is served at `site.com/some-file`.
If your project uses custom routing, this behavior may result in the same content being served from multiple paths, which can present problems with SEO and UX.
To disable this behavior & prevent routing based on files in `/pages`, simply set the following option in your `next.config.js`:
```js
// next.config.js
module.exports = {
useFileSystemPublicRoutes: false
}
```
### Dynamic Import
<p><details>