# Code groups

> Use the CodeGroup component to display multiple code examples in a tabbed interface and let readers compare implementations across languages.

Use the `CodeGroup` component to display multiple code blocks in a tabbed interface, allowing users to compare implementations across different programming languages or see alternative approaches for the same task.

:::code-group
```javascript helloWorld.js theme={null}
console.log("Hello World");
```

```python hello_world.py theme={null}
print('Hello World!')
```

```java HelloWorld.java theme={null}
class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}
```
:::

Code groups inherit global styling from your `docs.json` file. Customize your theme using `styling.codeblocks`. See [Settings](/guides/manage-your-site-organize-settings-appearance#styling) for configuration options.

Code groups automatically synchronize with other code groups and [tabs](/guides/create-content-components-tabs) on the same page when their labels match. When you select a language in one code group, all tabs and code groups with matching labels update to show the same language.

## Create code groups

To create a code group, wrap multiple code blocks with `<CodeGroup>` tags. Each code block must include a title, which becomes the tab label.

````mdx theme={null}
<CodeGroup>

```javascript helloWorld.js
console.log("Hello World");
```

```python hello_world.py
print('Hello World!')
```

```java HelloWorld.java
class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}
```

</CodeGroup>
````

## Language dropdown

You can replace the tabs in a code group with a dropdown menu to toggle between languages using the `dropdown` prop.

:::code-group
```javascript helloWorld.js theme={null}
console.log("Hello World");
```

```python hello_world.py theme={null}
print('Hello World!')
```

```java HelloWorld.java theme={null}
class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}
```
:::

````mdx highlight=1 theme={null}
<CodeGroup dropdown>

```javascript helloWorld.js
console.log("Hello World");
```

```python hello_world.py
print('Hello World!')
```

```java HelloWorld.java
class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}
```
</CodeGroup>
````

## Properties

- `className` (string) — Additional CSS classes to apply to the code group container.

## Related topics

- [Examples](/guides/create-content-components-examples)
- [Components overview](/docs/components/index.md)
- [Tabs](/guides/create-content-components-tabs)

## Related pages

- [Accordions](./create-content-components-accordions.md)
- [Badge](./create-content-components-badge.md)
- [Banner](./create-content-components-banner.md)
- [Callouts](./create-content-components-callouts.md)
- [Cards](./create-content-components-cards.md)
- [Color](./create-content-components-color.md)
- [Columns](./create-content-components-columns.md)
- [Examples](./create-content-components-examples.md)
- [Expandables](./create-content-components-expandables.md)
- [Fields](./create-content-components-fields.md)

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