---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.json
---
# Input
```cjs
export default function f() {};
```

# Diagnostics
```
invalid.json:1:8 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export default function f() {};
      │        ^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export default class C {};
```

# Diagnostics
```
invalid.json:1:8 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export default class C {};
      │        ^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export default function () {};
```

# Diagnostics
```
invalid.json:1:8 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export default function () {};
      │        ^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export default class {};
```

# Diagnostics
```
invalid.json:1:8 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export default class {};
      │        ^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export default X;
```

# Diagnostics
```
invalid.json:1:8 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export default X;
      │        ^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export default { f() {} };
```

# Diagnostics
```
invalid.json:1:8 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export default { f() {} };
      │        ^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export { X as default };
```

# Diagnostics
```
invalid.json:1:15 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export { X as default };
      │               ^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export { X as 'default' };
```

# Diagnostics
```
invalid.json:1:15 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export { X as 'default' };
      │               ^^^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export { default } from './module';
```

# Input
```cjs
export { X as default } from './module';
```

# Diagnostics
```
invalid.json:1:15 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export { X as default } from './module';
      │               ^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```

# Input
```cjs
export { X as 'default' } from './module';
```

# Diagnostics
```
invalid.json:1:15 lint/style/noDefaultExport ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Avoid default exports.
  
  > 1 │ export { X as 'default' } from './module';
      │               ^^^^^^^^^
  
  i Default exports cannot be easily discovered inside an editor and don't encourage the use of consistent names through a code base.
  
  i Use a named export instead.
  

```