---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.jsonc
---
# Input
```cjs
for (var i = 0; i < 10; i--) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 0; i < 10; i--) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 0; i <= 10; i--) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 0; i <= 10; i--) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 10; i > 10; i++) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 10; i > 10; i++) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 10; i >= 0; i++) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 10; i >= 0; i++) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 0; i < 10; i -= 1) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 0; i < 10; i -= 1) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 0; i <= 10; i -= 1) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 0; i <= 10; i -= 1) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 10; i > 10; i += 1) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 10; i > 10; i += 1) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 10; i >= 0; i += 1) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 10; i >= 0; i += 1) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 0; i < 10; i += -1) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 0; i < 10; i += -1) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 0; i <= 10; i += -1) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 0; i <= 10; i += -1) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 10; i > 10; i -= -1) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 10; i > 10; i -= -1) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  

```

# Input
```cjs
for (var i = 10; i >= 0; i -= -1) {}
```

# Diagnostics
```
invalid.jsonc:1:5 lint/correctness/useValidForDirection ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! The update clause in this loop moves the variable in the wrong direction.
  
  > 1 │ for (var i = 10; i >= 0; i -= -1) {}
      │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  

```