---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.jsonc
---
# Input
```cjs
function foo() { }; foo = bar;
```

# Diagnostics
```
invalid.jsonc:1:10 lint/suspicious/noFunctionAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not reassign a function declaration.
  
  > 1 │ function foo() { }; foo = bar;
      │          ^^^
  
  i Reassigned here.
  
  > 1 │ function foo() { }; foo = bar;
      │                     ^^^
  
  i Use a local variable instead.
  

```

# Input
```cjs
function foo2() { foo2 = bar; }
```

# Diagnostics
```
invalid.jsonc:1:10 lint/suspicious/noFunctionAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not reassign a function declaration.
  
  > 1 │ function foo2() { foo2 = bar; }
      │          ^^^^
  
  i Reassigned here.
  
  > 1 │ function foo2() { foo2 = bar; }
      │                   ^^^^
  
  i Use a local variable instead.
  

```

# Input
```cjs
foo3 = bar; function foo3() { };
```

# Diagnostics
```
invalid.jsonc:1:22 lint/suspicious/noFunctionAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not reassign a function declaration.
  
  > 1 │ foo3 = bar; function foo3() { };
      │                      ^^^^
  
  i Reassigned here.
  
  > 1 │ foo3 = bar; function foo3() { };
      │ ^^^^
  
  i Reassignment happens here because the function declaration is hoisted.
  
  i Use a local variable instead.
  

```

# Input
```cjs
[foo4] = bar; function foo4() { };
```

# Diagnostics
```
invalid.jsonc:1:24 lint/suspicious/noFunctionAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not reassign a function declaration.
  
  > 1 │ [foo4] = bar; function foo4() { };
      │                        ^^^^
  
  i Reassigned here.
  
  > 1 │ [foo4] = bar; function foo4() { };
      │  ^^^^
  
  i Reassignment happens here because the function declaration is hoisted.
  
  i Use a local variable instead.
  

```

# Input
```cjs
({ x: foo5 = 0 } = bar); function foo5() { };
```

# Diagnostics
```
invalid.jsonc:1:35 lint/suspicious/noFunctionAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not reassign a function declaration.
  
  > 1 │ ({ x: foo5 = 0 } = bar); function foo5() { };
      │                                   ^^^^
  
  i Reassigned here.
  
  > 1 │ ({ x: foo5 = 0 } = bar); function foo5() { };
      │       ^^^^
  
  i Reassignment happens here because the function declaration is hoisted.
  
  i Use a local variable instead.
  

```

# Input
```cjs
function foo6() { [foo6] = bar; }
```

# Diagnostics
```
invalid.jsonc:1:10 lint/suspicious/noFunctionAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not reassign a function declaration.
  
  > 1 │ function foo6() { [foo6] = bar; }
      │          ^^^^
  
  i Reassigned here.
  
  > 1 │ function foo6() { [foo6] = bar; }
      │                    ^^^^
  
  i Use a local variable instead.
  

```

# Input
```cjs
(function () { ({ x: foo7 = 0 } = bar); function foo7() { }; })();
```

# Diagnostics
```
invalid.jsonc:1:50 lint/suspicious/noFunctionAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not reassign a function declaration.
  
  > 1 │ (function () { ({ x: foo7 = 0 } = bar); function foo7() { }; })();
      │                                                  ^^^^
  
  i Reassigned here.
  
  > 1 │ (function () { ({ x: foo7 = 0 } = bar); function foo7() { }; })();
      │                      ^^^^
  
  i Reassignment happens here because the function declaration is hoisted.
  
  i Use a local variable instead.
  

```