---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalidParameterProperty.ts
---
# Input
```ts
export default class {
    constructor(
        readonly PascalCase: unknown,

        protected CONSTANT_CASE: unknown,

        public Unknown_Style: unknown,
    ) {}
}
```

# Diagnostics
```
invalidParameterProperty.ts:3:18 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This parameter property name should be in camelCase.
  
    1 │ export default class {
    2 │     constructor(
  > 3 │         readonly PascalCase: unknown,
      │                  ^^^^^^^^^^
    4 │ 
    5 │         protected CONSTANT_CASE: unknown,
  
  i The name could be renamed to `pascalCase`.
  

```

```
invalidParameterProperty.ts:5:19 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This parameter property name should be in camelCase.
  
    3 │         readonly PascalCase: unknown,
    4 │ 
  > 5 │         protected CONSTANT_CASE: unknown,
      │                   ^^^^^^^^^^^^^
    6 │ 
    7 │         public Unknown_Style: unknown,
  
  i The name could be renamed to `constantCase`.
  

```

```
invalidParameterProperty.ts:7:16 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This parameter property name should be in camelCase.
  
    5 │         protected CONSTANT_CASE: unknown,
    6 │ 
  > 7 │         public Unknown_Style: unknown,
      │                ^^^^^^^^^^^^^
    8 │     ) {}
    9 │ }
  
  i The name could be renamed to `unknownStyle`.
  

```