---
url: /docs/guide/usage/linter/rules/import/prefer-default-export.md
---

### What it does

Checks whether there is a default export.

### Why is this bad?

This rule exists to standardize module exports by preferring default exports
when a module only has one export, enhancing readability, maintainability.

### Examples

Examples of **incorrect** code for the `{ target: "single" }` option:

```js
export const foo = "foo";
```

Examples of **correct** code for the `{ target: "single" }` option:

```js
export const foo = "foo";
const bar = "bar";
export default bar;
```

Examples of **incorrect** code for the `{ target: "any" }` option:

```js
export const foo = "foo";
export const baz = "baz";
```

Examples of **correct** code for the `{ target: "any" }` option:

```js
export default function bar() {}
```

## Configuration

This rule accepts a configuration object with the following properties:

### target

type: `"single" | "any"`

default: `"single"`

Configuration option to specify the target type for preferring default exports.

#### `"single"`

Prefer default export when there is only one export in the module.

#### `"any"`

Prefer default export in any module that has exports.

## How to use

## Version

This rule was added in v1.4.0.

## References