---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.ts
---
# Input
```ts
/*before*/module/*after*/ foo {}

declare module bar {}

declare module outer {
	export module inner {}
}
```

# Diagnostics
```
invalid.ts:1:11 lint/suspicious/useNamespaceKeyword  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Use the namespace keyword instead of the outdated module keyword.
  
  > 1 │ /*before*/module/*after*/ foo {}
      │           ^^^^^^
    2 │ 
    3 │ declare module bar {}
  
  i The module keyword is deprecated to avoid any confusion with the ECMAScript modules which are often called modules.
  
  i Safe fix: Use namespace instead.
  
    1   │ - /*before*/module/*after*/·foo·{}
      1 │ + /*before*/namespace/*after*/·foo·{}
    2 2 │   
    3 3 │   declare module bar {}
  

```

```
invalid.ts:3:9 lint/suspicious/useNamespaceKeyword  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Use the namespace keyword instead of the outdated module keyword.
  
    1 │ /*before*/module/*after*/ foo {}
    2 │ 
  > 3 │ declare module bar {}
      │         ^^^^^^
    4 │ 
    5 │ declare module outer {
  
  i The module keyword is deprecated to avoid any confusion with the ECMAScript modules which are often called modules.
  
  i Safe fix: Use namespace instead.
  
    1 1 │   /*before*/module/*after*/ foo {}
    2 2 │   
    3   │ - declare·module·bar·{}
      3 │ + declare·namespace·bar·{}
    4 4 │   
    5 5 │   declare module outer {
  

```

```
invalid.ts:5:9 lint/suspicious/useNamespaceKeyword  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Use the namespace keyword instead of the outdated module keyword.
  
    3 │ declare module bar {}
    4 │ 
  > 5 │ declare module outer {
      │         ^^^^^^
    6 │ 	export module inner {}
    7 │ }
  
  i The module keyword is deprecated to avoid any confusion with the ECMAScript modules which are often called modules.
  
  i Safe fix: Use namespace instead.
  
    3 3 │   declare module bar {}
    4 4 │   
    5   │ - declare·module·outer·{
      5 │ + declare·namespace·outer·{
    6 6 │   	export module inner {}
    7 7 │   }
  

```

```
invalid.ts:6:9 lint/suspicious/useNamespaceKeyword  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Use the namespace keyword instead of the outdated module keyword.
  
    5 │ declare module outer {
  > 6 │ 	export module inner {}
      │ 	       ^^^^^^
    7 │ }
  
  i The module keyword is deprecated to avoid any confusion with the ECMAScript modules which are often called modules.
  
  i Safe fix: Use namespace instead.
  
    4 4 │   
    5 5 │   declare module outer {
    6   │ - → export·module·inner·{}
      6 │ + → export·namespace·inner·{}
    7 7 │   }
  

```