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'

```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]
}
```