---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalidFunctionParameter.js
---
# Input
```jsx
function f(A, SpecialParameter, _snake_case, CONSTANT_CASE) {}
```

# Diagnostics
```
invalidFunctionParameter.js:1:12 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This function parameter name should be in camelCase.
  
  > 1 │ function f(A, SpecialParameter, _snake_case, CONSTANT_CASE) {}
      │            ^
  
  i The name could be renamed to `a`.
  
  i Safe fix: Rename this symbol in camelCase.
  
  - function·f(A,·SpecialParameter,·_snake_case,·CONSTANT_CASE)·{}
  + function·f(a,·SpecialParameter,·_snake_case,·CONSTANT_CASE)·{}
  

```

```
invalidFunctionParameter.js:1:15 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This function parameter name should be in camelCase.
  
  > 1 │ function f(A, SpecialParameter, _snake_case, CONSTANT_CASE) {}
      │               ^^^^^^^^^^^^^^^^
  
  i The name could be renamed to `specialParameter`.
  
  i Safe fix: Rename this symbol in camelCase.
  
  - function·f(A,·SpecialParameter,·_snake_case,·CONSTANT_CASE)·{}
  + function·f(A,·specialParameter,·_snake_case,·CONSTANT_CASE)·{}
  

```

```
invalidFunctionParameter.js:1:33 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This function parameter name trimmed as `snake_case` should be in camelCase.
  
  > 1 │ function f(A, SpecialParameter, _snake_case, CONSTANT_CASE) {}
      │                                 ^^^^^^^^^^^
  
  i The name could be renamed to `_snakeCase`.
  
  i Safe fix: Rename this symbol in camelCase.
  
  - function·f(A,·SpecialParameter,·_snake_case,·CONSTANT_CASE)·{}
  + function·f(A,·SpecialParameter,·_snakeCase,·CONSTANT_CASE)·{}
  

```

```
invalidFunctionParameter.js:1:46 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This function parameter name should be in camelCase.
  
  > 1 │ function f(A, SpecialParameter, _snake_case, CONSTANT_CASE) {}
      │                                              ^^^^^^^^^^^^^
  
  i The name could be renamed to `constantCase`.
  
  i Safe fix: Rename this symbol in camelCase.
  
  - function·f(A,·SpecialParameter,·_snake_case,·CONSTANT_CASE)·{}
  + function·f(A,·SpecialParameter,·_snake_case,·constantCase)·{}
  

```