---
group: Customization
title: Custom Links & Pages
weight: 60
---

The Static CMS exposes a `window.CMS` global object that you can use to register external links or links custom pages, via `registerAdditionalLink`. The links are displayed at the bottom of the navigation menu in the order they are registered.

### React Components Inline

The `registerPreviewTemplate` requires you to provide a React component. If you have a build process in place for your project, it is possible to integrate with this build process.

However, although possible, it may be cumbersome or even impractical to add a React build phase. For this reason, Static CMS exposes some constructs globally to allow you to create components inline: `h` (alias for React.createElement) as well some basic hooks (`useState`, `useMemo`, `useEffect`, `useCallback`).

**NOTE**: `createClass` is still provided, allowing for the creation of react class components. However it has now been deprecated and will be removed in `v2.0.0`.

## Params

`registerAdditionalLink` takes an `AdditionalLink` object with the following properties:

| Param   | Type                                                                                          | Description                                                                                                                                   |
| ------- | --------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------- |
| id      | string                                                                                        | Unique identifier for the link                                                                                                                |
| title   | string                                                                                        | Display text for the link                                                                                                                     |
| data    | string<br />\| [React Function Component](https://reactjs.org/docs/components-and-props.html) | <ul><li>`string` - The href for the link</li><li>`React Function Component` - A react component to render on the route `/page/[id]`</li></ul> |
| options | object                                                                                        | _Optional_. See [Options](#options)                                                                                                           |

### Options

Available options for each additional link are:

| Param    | Type   | Description                                                                             |
| -------- | ------ | --------------------------------------------------------------------------------------- |
| iconName | string | The name of a custom registered icon to display. See [Custom Icons](/docs/custom-icons) |

## Examples

### External Links

```js
CMS.registerAdditionalLink({
  id: 'example',
  title: 'Example.com',
  data: 'https://example.com',
  options: {
    icon: 'page',
  },
});
```

### Custom Page

```js
const CustomPage = () => {
  return h('div', {}, 'I am a custom page!');
};

CMS.registerAdditionalLink({
  id: 'custom-page',
  title: 'Custom Page',
  data: CustomPage,
  options: {
    icon: 'page',
  },
});
```