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

```

# Diagnostics
```
invalid.js:3:9 parse/noSuperWithoutExtends ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! super() is only valid in derived class constructors
  
    1 │ class A {
    2 │     constructor() {
  > 3 │         super()
      │         ^^^^^
    4 │     }
    5 │ }
  

```