MDX Syntax - CodeBlock

```js lineNumbers={false}
// lineNumbers is disabled
const line2 = 'This is line 2'
const line3 = 'This is line 3'
```

```js lineNumbers
// lineNumbers is enabled
const line2 = 'This is line 2'
const line3 = 'This is line 3'
```

// lineNumbers is disabled
const line2 = 'This is line 2'
const line3 = 'This is line 3'

```ts title="src/utils/clipboard.ts"
export function copyToClipboard(text: string) {
  if (navigator && navigator.clipboard && navigator.clipboard.writeText)
    return navigator.clipboard.writeText(text)
  return Promise.reject('The Clipboard API is not available.')
}
```

```text lineNumbers highlights='1,3-4'
line 1
line 2
line 3
line 4
line 5
```

```js
const data = {
  message: 'Removed', // [!code --]
  message: 'Added', // [!code ++]
}
```

const data = {
  message: 'Removed', 
  message: 'Added', 
}

```js
const data = {
  message: 'Error', // [!code error]
  message: 'Warning', // [!code warning]
}
```

const data = {
  message: 'Error', 
  message: 'Warning', 
}

```js
const data = {
  message: 'Focused', // [!code focus]
}
```