---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.js
---
# Input
```jsx
class WithDocs {
    /**
     * A documented constructor.
     */
    constructor() {}
}

class WithComments {
    constructor() {
        // A comment.
    }
}

```

# Diagnostics
```
invalid.js:5:5 lint/complexity/noUselessConstructor  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This constructor is unnecessary.
  
    3 │      * A documented constructor.
    4 │      */
  > 5 │     constructor() {}
      │     ^^^^^^^^^^^^^^^^
    6 │ }
    7 │ 
  
  i Unsafe fix: Remove the unnecessary constructor.
  
     1 1 │   class WithDocs {
     2   │ - ····/**
     3   │ - ·····*·A·documented·constructor.
     4   │ - ·····*/
     5   │ - ····constructor()·{}
     6 2 │   }
     7 3 │   
  

```

```
invalid.js:9:5 lint/complexity/noUselessConstructor  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This constructor is unnecessary.
  
     8 │ class WithComments {
   > 9 │     constructor() {
       │     ^^^^^^^^^^^^^^^
  > 10 │         // A comment.
  > 11 │     }
       │     ^
    12 │ }
    13 │ 
  
  i Unsafe fix: Remove the unnecessary constructor.
  
     7  7 │   
     8  8 │   class WithComments {
     9    │ - ····constructor()·{
    10    │ - ········//·A·comment.
    11    │ - ····}
    12  9 │   }
    13 10 │   
  

```