# Navbar

The navbar is very important to a website. It allows users to quickly jump between different pages of the website, and also allows users to quickly find some important information of the website.

## Custom Navigation Menu

You can add a custom navigation menu in `themeConfig.nav`, configured as an array, as follows:

```ts title="modern.config.ts"
import docTools, { defineConfig } from '@modern-js/doc-tools';

export default defineConfig({
  doc: {
    themeConfig: {
      nav: [],
    },
  },
  plugins: [docTools()],
});
```

The nav bar is configured as an array, and each item in the array is a `NavItem` object, which has the following types:

```ts
export type NavItem = NavItemWithLink | NavItemWithChildren;
```

That is, each navbar element ( `NavItem` ) can be a link ( `NavItemWithLink` ), or a navbar group containing child elements ( `NavItemWithChildren` ).

### NavItemWithLink

```ts
export interface NavItemWithLink {
  text: string;
  link: string;
  activeMatch?: string;
  position?: 'left' | 'right';
}
```

The meanings of the attributes are as follows:

- `text` - Navbar text
- `link` - Navbar link
- `activeMatch` - Activation rule for navbar links
- `position` - Navbar menu item position



Attribute details:

`activeMatch` is used to match the current route, when the route matches the `activeMatch` rule, the nav item will be highlighted.

> By default, `activeMatch` is the `link` attribute of NavItem.

`position` is used to configure independent positioning of top menu items, with the following options available:

- `left` placed in the left menu bar at the top of the menu item;
- `right` pplaced in the right menu bar at the top of the menu item.

> If the `position` is not configured, it will be placed on the right menu bar by default, which is equivalent to configuring `right` .

### NavItemWithChildren

```ts
export interface NavItemWithChildren {
  text: string;
  items: NavItem[];
  position?: 'left' | 'right';
}
```

The meanings of the attributes are as follows:

- `text` - Navbar text
- `items` - Subnavbar elements
- `position` - Navbar menu item position with child navbar elements

### Example

```ts title="modern.config.ts"
import docTools, { defineConfig } from '@modern-js/doc-tools';

export default defineConfig({
  doc: {
    themeConfig: {
      nav: [
        {
          text: 'Home',
          link: '/',
          position: 'left',
        },
        {
          text: 'Links',
          items: [
            {
              text: 'Github',
              link: 'http://github.com/',
            },
            {
              text: 'Twitter',
              link: 'http://twitter.com/',
            },
          ],
          position: 'left',
        },
      ],
    },
  },
  plugins: [docTools()],
});
```

## Light/Dark Mode

By default, the navbar will have a toggle button for `Light/Dark` mode, you can disable it with the following config:

```ts title="modern.config.ts"
import docTools, { defineConfig } from '@modern-js/doc-tools';

export default defineConfig({
  doc: {
    themeConfig: {
      darkMode: false,
    },
  },
  plugins: [docTools()],
});
```

## Related Links

Social Links to the Site. For example:

```ts title="modern.config.ts"
import docTools, { defineConfig } from '@modern-js/doc-tools';

export default defineConfig({
  doc: {
    themeConfig: {
      socialLinks: [
        {
          icon: 'github',
          link: 'github.com/web-infra-dev/modern.js',
        },
      ],
    },
  },
  plugins: [docTools()],
});
```

For more configurations, please refer to [links](/en/api/config-theme#sociallinks).
