---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.js
---
# Input
```jsx
window = {};
Object = null;
undefined = 1;
length = 1;
top = 1;
String++;
({Object = 0, String = 0} = {});
require = 0;
```

# Diagnostics
```
invalid.js:1:1 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
  > 1 │ window = {};
      │ ^^^^^^^
    2 │ Object = null;
    3 │ undefined = 1;
  
  i Assigning to a global variable can override essential functionality.
  

```

```
invalid.js:1:13 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
  > 1 │ window = {};
      │             
  > 2 │ Object = null;
      │ ^^^^^^^
    3 │ undefined = 1;
    4 │ length = 1;
  
  i Assigning to a global variable can override essential functionality.
  

```

```
invalid.js:2:15 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
    1 │ window = {};
  > 2 │ Object = null;
      │               
  > 3 │ undefined = 1;
      │ ^^^^^^^^^^
    4 │ length = 1;
    5 │ top = 1;
  
  i Assigning to a global variable can override essential functionality.
  

```

```
invalid.js:3:15 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
    1 │ window = {};
    2 │ Object = null;
  > 3 │ undefined = 1;
      │               
  > 4 │ length = 1;
      │ ^^^^^^^
    5 │ top = 1;
    6 │ String++;
  
  i Assigning to a global variable can override essential functionality.
  

```

```
invalid.js:4:12 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
    2 │ Object = null;
    3 │ undefined = 1;
  > 4 │ length = 1;
      │            
  > 5 │ top = 1;
      │ ^^^^
    6 │ String++;
    7 │ ({Object = 0, String = 0} = {});
  
  i Assigning to a global variable can override essential functionality.
  

```

```
invalid.js:5:9 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
    3 │ undefined = 1;
    4 │ length = 1;
  > 5 │ top = 1;
      │         
  > 6 │ String++;
      │ ^^^^^^
    7 │ ({Object = 0, String = 0} = {});
    8 │ require = 0;
  
  i Assigning to a global variable can override essential functionality.
  

```

```
invalid.js:7:3 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
    5 │ top = 1;
    6 │ String++;
  > 7 │ ({Object = 0, String = 0} = {});
      │   ^^^^^^^
    8 │ require = 0;
  
  i Assigning to a global variable can override essential functionality.
  

```

```
invalid.js:7:15 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
    5 │ top = 1;
    6 │ String++;
  > 7 │ ({Object = 0, String = 0} = {});
      │               ^^^^^^^
    8 │ require = 0;
  
  i Assigning to a global variable can override essential functionality.
  

```

```
invalid.js:7:33 lint/suspicious/noGlobalAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! A global variable should not be reassigned.
  
    5 │ top = 1;
    6 │ String++;
  > 7 │ ({Object = 0, String = 0} = {});
      │                                 
  > 8 │ require = 0;
      │ ^^^^^^^^
  
  i Assigning to a global variable can override essential functionality.
  

```