---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalidCatchParameter.js
---
# Input
```jsx
try {} catch(E) {}

try {} catch(SpecificError) {}

try {} catch(specific_error) {}

try {} catch(SPECIFIC_ERROR) {}

```

# Diagnostics
```
invalidCatchParameter.js:1:14 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This catch parameter name should be in camelCase.
  
  > 1 │ try {} catch(E) {}
      │              ^
    2 │ 
    3 │ try {} catch(SpecificError) {}
  
  i The name could be renamed to `e`.
  
  i Safe fix: Rename this symbol in camelCase.
  
    1   │ - try·{}·catch(E)·{}
      1 │ + try·{}·catch(e)·{}
    2 2 │   
    3 3 │   try {} catch(SpecificError) {}
  

```

```
invalidCatchParameter.js:3:14 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This catch parameter name should be in camelCase.
  
    1 │ try {} catch(E) {}
    2 │ 
  > 3 │ try {} catch(SpecificError) {}
      │              ^^^^^^^^^^^^^
    4 │ 
    5 │ try {} catch(specific_error) {}
  
  i The name could be renamed to `specificError`.
  
  i Safe fix: Rename this symbol in camelCase.
  
    1 1 │   try {} catch(E) {}
    2 2 │   
    3   │ - try·{}·catch(SpecificError)·{}
      3 │ + try·{}·catch(specificError)·{}
    4 4 │   
    5 5 │   try {} catch(specific_error) {}
  

```

```
invalidCatchParameter.js:5:14 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This catch parameter name should be in camelCase.
  
    3 │ try {} catch(SpecificError) {}
    4 │ 
  > 5 │ try {} catch(specific_error) {}
      │              ^^^^^^^^^^^^^^
    6 │ 
    7 │ try {} catch(SPECIFIC_ERROR) {}
  
  i The name could be renamed to `specificError`.
  
  i Safe fix: Rename this symbol in camelCase.
  
    3 3 │   try {} catch(SpecificError) {}
    4 4 │   
    5   │ - try·{}·catch(specific_error)·{}
      5 │ + try·{}·catch(specificError)·{}
    6 6 │   
    7 7 │   try {} catch(SPECIFIC_ERROR) {}
  

```

```
invalidCatchParameter.js:7:14 lint/style/useNamingConvention  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This catch parameter name should be in camelCase.
  
    5 │ try {} catch(specific_error) {}
    6 │ 
  > 7 │ try {} catch(SPECIFIC_ERROR) {}
      │              ^^^^^^^^^^^^^^
    8 │ 
  
  i The name could be renamed to `specificError`.
  
  i Safe fix: Rename this symbol in camelCase.
  
    5 5 │   try {} catch(specific_error) {}
    6 6 │   
    7   │ - try·{}·catch(SPECIFIC_ERROR)·{}
      7 │ + try·{}·catch(specificError)·{}
    8 8 │   
  

```