---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalidTsInJs.js
---
# Input
```jsx
ArrayLike;
PromiseLike;

```

# Diagnostics
```
invalidTsInJs.js:1:1 lint/correctness/noUndeclaredVariables ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The ArrayLike variable is undeclared
  
  > 1 │ ArrayLike;
      │ ^^^^^^^^^
    2 │ PromiseLike;
    3 │ 
  

```

```
invalidTsInJs.js:2:1 lint/correctness/noUndeclaredVariables ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The PromiseLike variable is undeclared
  
    1 │ ArrayLike;
  > 2 │ PromiseLike;
      │ ^^^^^^^^^^^
    3 │ 
  

```