---
url: /docs/guide/usage/linter/rules/eslint/max-classes-per-file.md
---

### What it does

Enforce a maximum number of classes per file.

### Why is this bad?

Files containing multiple classes can often result in a less navigable and poorly
structured codebase. Best practice is to keep each file limited to a single responsibility.

### Examples

Examples of **incorrect** code for this rule:

```javascript
class Foo {}
class Bar {}
```

Examples of **correct** code for this rule:

```js
function foo() {
  var bar = 1;
  let baz = 2;
  const qux = 3;
}
```

## Configuration

### ignoreExpressions

type: `boolean`

default: `false`

Whether to ignore class expressions when counting classes.

### max

type: `integer`

default: `1`

The maximum number of classes allowed per file.

## How to use

## Version

This rule was added in v0.3.4.

## References