---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.js
---
# Input
```jsx
for (; true; ) {}

let i =0;
for (; i < 10; ) {
    i++;
}

// Comment
for /*a*/ ( /*init*/; /*test before*/ true /*test after*/; /*update*/ ) /*b*/ {
    // body
}

```

# Diagnostics
```
invalid.js:1:1 lint/style/useWhile  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Use a while loop instead of a for loop.
  
  > 1 │ for (; true; ) {}
      │ ^^^^^^^^^^^^^^
    2 │ 
    3 │ let i =0;
  
  i Prefer a while loop over a for loop without initialization and update.
  
  i Safe fix: Use a while loop.
  
     1    │ - for·(;·true;·)·{}
        1 │ + while·(true)·{}
     2  2 │   
     3  3 │   let i =0;
  

```

```
invalid.js:4:1 lint/style/useWhile  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Use a while loop instead of a for loop.
  
    3 │ let i =0;
  > 4 │ for (; i < 10; ) {
      │ ^^^^^^^^^^^^^^^^
    5 │     i++;
    6 │ }
  
  i Prefer a while loop over a for loop without initialization and update.
  
  i Safe fix: Use a while loop.
  
     2  2 │   
     3  3 │   let i =0;
     4    │ - for·(;·i·<·10;·)·{
        4 │ + while·(i·<·10)·{
     5  5 │       i++;
     6  6 │   }
  

```

```
invalid.js:9:1 lint/style/useWhile  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Use a while loop instead of a for loop.
  
     8 │ // Comment
   > 9 │ for /*a*/ ( /*init*/; /*test before*/ true /*test after*/; /*update*/ ) /*b*/ {
       │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    10 │     // body
    11 │ }
  
  i Prefer a while loop over a for loop without initialization and update.
  
  i Safe fix: Use a while loop.
  
     7  7 │   
     8  8 │   // Comment
     9    │ - for·/*a*/·(·/*init*/;·/*test·before*/·true·/*test·after*/;·/*update*/·)·/*b*/·{
        9 │ + while·/*a*/·(/*test·before*/·true·/*test·after*/)·/*b*/·{
    10 10 │       // body
    11 11 │   }
  

```