The config reference is incomplete since the config format may still receive further changes. For a complete reference of the current available options, refer to [config.ts](https://github.com/vuejs/vitepress/blob/master/src/node/config.ts#L15).
The base URL the site will be deployed at. You will need to set this if you plan to deploy your site under a sub path, for example, GitHub pages. If you plan to deploy your site to `https://foo.github.io/bar/`, then you should set base to `'/bar/'`. It should always start and end with a slash.
The `base` is automatically prepended to all the URLs that start with `/` in other options, so you only need to specify it once.
```js
module.exports = {
base: '/base/'
}
```
## lang
- Type: `string`
- Default: `en-US`
The `lang` attribute for the site. This will render as a `<html lang="en-US">` tag in the page HTML.
