---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalidTopLevelVariable.ts
---
# Input
```ts
export const Unknown_Style = 0
export const MY__CONSTANT = 0

export var Unknown_Style_1 = 0

export let Unknown_Style_2 = 0

export namespace X {
    export const Unknown_Style = 0

    export var Unknown_Style_1 = 0

    export let Unknown_Style_2 = 0
}

export const fooYPosition = 0;
```

# Diagnostics
```
invalidTopLevelVariable.ts:1:14 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This top-level const name should be in camelCase or PascalCase or CONSTANT_CASE.
  
  > 1 │ export const Unknown_Style = 0
      │              ^^^^^^^^^^^^^
    2 │ export const MY__CONSTANT = 0
    3 │ 
  
  i The name could be renamed to `unknownStyle`.
  

```

```
invalidTopLevelVariable.ts:2:14 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This top-level const name should be in camelCase or PascalCase or CONSTANT_CASE.
  
    1 │ export const Unknown_Style = 0
  > 2 │ export const MY__CONSTANT = 0
      │              ^^^^^^^^^^^^
    3 │ 
    4 │ export var Unknown_Style_1 = 0
  
  i The name could be renamed to `myConstant`.
  

```

```
invalidTopLevelVariable.ts:4:12 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This top-level var name should be in camelCase or PascalCase or CONSTANT_CASE.
  
    2 │ export const MY__CONSTANT = 0
    3 │ 
  > 4 │ export var Unknown_Style_1 = 0
      │            ^^^^^^^^^^^^^^^
    5 │ 
    6 │ export let Unknown_Style_2 = 0
  
  i The name could be renamed to `unknownStyle1`.
  

```

```
invalidTopLevelVariable.ts:6:12 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This top-level let name should be in camelCase.
  
    4 │ export var Unknown_Style_1 = 0
    5 │ 
  > 6 │ export let Unknown_Style_2 = 0
      │            ^^^^^^^^^^^^^^^
    7 │ 
    8 │ export namespace X {
  
  i The name could be renamed to `unknownStyle2`.
  

```

```
invalidTopLevelVariable.ts:9:18 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This top-level const name should be in camelCase or PascalCase or CONSTANT_CASE.
  
     8 │ export namespace X {
   > 9 │     export const Unknown_Style = 0
       │                  ^^^^^^^^^^^^^
    10 │ 
    11 │     export var Unknown_Style_1 = 0
  
  i The name could be renamed to `unknownStyle`.
  

```

```
invalidTopLevelVariable.ts:11:16 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This top-level var name should be in camelCase or PascalCase or CONSTANT_CASE.
  
     9 │     export const Unknown_Style = 0
    10 │ 
  > 11 │     export var Unknown_Style_1 = 0
       │                ^^^^^^^^^^^^^^^
    12 │ 
    13 │     export let Unknown_Style_2 = 0
  
  i The name could be renamed to `unknownStyle1`.
  

```

```
invalidTopLevelVariable.ts:13:16 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This top-level let name should be in camelCase.
  
    11 │     export var Unknown_Style_1 = 0
    12 │ 
  > 13 │     export let Unknown_Style_2 = 0
       │                ^^^^^^^^^^^^^^^
    14 │ }
    15 │ 
  
  i The name could be renamed to `unknownStyle2`.
  

```

```
invalidTopLevelVariable.ts:16:14 lint/style/useNamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Two consecutive uppercase characters are not allowed in camelCase and PascalCase because strictCase is set to `true`.
  
    14 │ }
    15 │ 
  > 16 │ export const fooYPosition = 0;
       │              ^^^^^^^^^^^^
  
  i If you want to use consecutive uppercase characters in camelCase and PascalCase, then set the strictCase option to `false`.
    See the rule options for more details.
  

```