---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalidUsedBindingPattern.js
---
# Input
```jsx
export function f({ a, b }) {
	console.info(b);
}

```

# Diagnostics
```
invalidUsedBindingPattern.js:1:21 lint/correctness/noUnusedVariables ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This variable is unused.
  
  > 1 │ export function f({ a, b }) {
      │                     ^
    2 │ 	console.info(b);
    3 │ }
  
  i Unused variables usually are result of incomplete refactoring, typos and other source of bugs.
  

```