---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalidFunction.js
---
# Input
```jsx
function PERSON() {}

function special_function() {}

function Unknown_Style() {}

const g = function SPECIAL_FUNCTION() {}
```

# Diagnostics
```
invalidFunction.js:1:10 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This function name should be in camelCase or PascalCase.
  
  > 1 │ function PERSON() {}
      │          ^^^^^^
    2 │ 
    3 │ function special_function() {}
  
  i The name could be renamed to `person`.
  
  i Safe fix: Rename this symbol in camelCase.
  
    1   │ - function·PERSON()·{}
      1 │ + function·person()·{}
    2 2 │   
    3 3 │   function special_function() {}
  

```

```
invalidFunction.js:3:10 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This function name should be in camelCase or PascalCase.
  
    1 │ function PERSON() {}
    2 │ 
  > 3 │ function special_function() {}
      │          ^^^^^^^^^^^^^^^^
    4 │ 
    5 │ function Unknown_Style() {}
  
  i The name could be renamed to `specialFunction`.
  
  i Safe fix: Rename this symbol in camelCase.
  
    1 1 │   function PERSON() {}
    2 2 │   
    3   │ - function·special_function()·{}
      3 │ + function·specialFunction()·{}
    4 4 │   
    5 5 │   function Unknown_Style() {}
  

```

```
invalidFunction.js:5:10 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This function name should be in camelCase or PascalCase.
  
    3 │ function special_function() {}
    4 │ 
  > 5 │ function Unknown_Style() {}
      │          ^^^^^^^^^^^^^
    6 │ 
    7 │ const g = function SPECIAL_FUNCTION() {}
  
  i The name could be renamed to `unknownStyle`.
  
  i Safe fix: Rename this symbol in camelCase.
  
    3 3 │   function special_function() {}
    4 4 │   
    5   │ - function·Unknown_Style()·{}
      5 │ + function·unknownStyle()·{}
    6 6 │   
    7 7 │   const g = function SPECIAL_FUNCTION() {}
  

```

```
invalidFunction.js:7:20 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This function name should be in camelCase or PascalCase.
  
    5 │ function Unknown_Style() {}
    6 │ 
  > 7 │ const g = function SPECIAL_FUNCTION() {}
      │                    ^^^^^^^^^^^^^^^^
  
  i The name could be renamed to `specialFunction`.
  
  i Safe fix: Rename this symbol in camelCase.
  
    5 5 │   function Unknown_Style() {}
    6 6 │   
    7   │ - const·g·=·function·SPECIAL_FUNCTION()·{}
      7 │ + const·g·=·function·specialFunction()·{}
  

```