---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.js
---
# Input
```jsx
function case12() {
	class A { }
	A = 0;
}

function case13() {
	class B { }
	({B} = 0);
}

function case14() {
	class C { }
	({b: C = 0} = {});
}

function case15() {
	D = 0;
	class D { }
}

function case16() {
	class E {
		b() {
			E = 0;
		}
	}
}

function case17() {
	let F = class F {
		b() {
			F = 0;
		}
	}
}

function case18() {
	class G { }
	G = 0;
	G = 1;
}

```

# Diagnostics
```
invalid.js:3:2 lint/suspicious/noClassAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! 'A' is a class.
  
    1 │ function case12() {
    2 │ 	class A { }
  > 3 │ 	A = 0;
      │ 	^
    4 │ }
    5 │ 
  
  i 'A' is defined here.
  
    1 │ function case12() {
  > 2 │ 	class A { }
      │ 	      ^
    3 │ 	A = 0;
    4 │ }
  

```

```
invalid.js:8:4 lint/suspicious/noClassAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! 'B' is a class.
  
     6 │ function case13() {
     7 │ 	class B { }
   > 8 │ 	({B} = 0);
       │ 	  ^
     9 │ }
    10 │ 
  
  i 'B' is defined here.
  
    6 │ function case13() {
  > 7 │ 	class B { }
      │ 	      ^
    8 │ 	({B} = 0);
    9 │ }
  

```

```
invalid.js:13:7 lint/suspicious/noClassAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! 'C' is a class.
  
    11 │ function case14() {
    12 │ 	class C { }
  > 13 │ 	({b: C = 0} = {});
       │ 	     ^
    14 │ }
    15 │ 
  
  i 'C' is defined here.
  
    11 │ function case14() {
  > 12 │ 	class C { }
       │ 	      ^
    13 │ 	({b: C = 0} = {});
    14 │ }
  

```

```
invalid.js:17:2 lint/suspicious/noClassAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! 'D' is a class.
  
    16 │ function case15() {
  > 17 │ 	D = 0;
       │ 	^
    18 │ 	class D { }
    19 │ }
  
  i 'D' is defined here.
  
    16 │ function case15() {
    17 │ 	D = 0;
  > 18 │ 	class D { }
       │ 	      ^
    19 │ }
    20 │ 
  

```

```
invalid.js:24:4 lint/suspicious/noClassAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! 'E' is a class.
  
    22 │ 	class E {
    23 │ 		b() {
  > 24 │ 			E = 0;
       │ 			^
    25 │ 		}
    26 │ 	}
  
  i 'E' is defined here.
  
    21 │ function case16() {
  > 22 │ 	class E {
       │ 	      ^
    23 │ 		b() {
    24 │ 			E = 0;
  

```

```
invalid.js:32:4 lint/suspicious/noClassAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! 'F' is a class.
  
    30 │ 	let F = class F {
    31 │ 		b() {
  > 32 │ 			F = 0;
       │ 			^
    33 │ 		}
    34 │ 	}
  
  i 'F' is defined here.
  
    29 │ function case17() {
  > 30 │ 	let F = class F {
       │ 	              ^
    31 │ 		b() {
    32 │ 			F = 0;
  

```

```
invalid.js:39:2 lint/suspicious/noClassAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! 'G' is a class.
  
    37 │ function case18() {
    38 │ 	class G { }
  > 39 │ 	G = 0;
       │ 	^
    40 │ 	G = 1;
    41 │ }
  
  i 'G' is defined here.
  
    37 │ function case18() {
  > 38 │ 	class G { }
       │ 	      ^
    39 │ 	G = 0;
    40 │ 	G = 1;
  

```

```
invalid.js:40:2 lint/suspicious/noClassAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! 'G' is a class.
  
    38 │ 	class G { }
    39 │ 	G = 0;
  > 40 │ 	G = 1;
       │ 	^
    41 │ }
    42 │ 
  
  i 'G' is defined here.
  
    37 │ function case18() {
  > 38 │ 	class G { }
       │ 	      ^
    39 │ 	G = 0;
    40 │ 	G = 1;
  

```