---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.js
---
# Input
```jsx
// js module
"use strict"; // Associated comment

function foo() {
	"use strict";
}

class C1 {
	// All code here is evaluated in strict mode
	test() {
		"use strict";
	}
}

const C2 = class {
	// All code here is evaluated in strict mode
	test() {
		"use strict";
	}
};

```

# Diagnostics
```
invalid.js:2:1 lint/suspicious/noRedundantUseStrict  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Redundant use strict directive.
  
    1 │ // js module
  > 2 │ "use strict"; // Associated comment
      │ ^^^^^^^^^^^^^
    3 │ 
    4 │ function foo() {
  
  i The entire contents of JavaScript modules are automatically in strict mode, with no statement needed to initiate it.
  
  i Safe fix: Remove the redundant use strict directive.
  
     1  1 │   // js module
     2    │ - "use·strict";·//·Associated·comment
     3  2 │   
     4  3 │   function foo() {
  

```

```
invalid.js:5:2 lint/suspicious/noRedundantUseStrict  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Redundant use strict directive.
  
    4 │ function foo() {
  > 5 │ 	"use strict";
      │ 	^^^^^^^^^^^^^
    6 │ }
    7 │ 
  
  i The entire contents of JavaScript modules are automatically in strict mode, with no statement needed to initiate it.
  
  i Safe fix: Remove the redundant use strict directive.
  
     3  3 │   
     4  4 │   function foo() {
     5    │ - → "use·strict";
     6    │ - }
        5 │ + → }
     7  6 │   
     8  7 │   class C1 {
  

```

```
invalid.js:11:3 lint/suspicious/noRedundantUseStrict  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Redundant use strict directive.
  
     9 │ 	// All code here is evaluated in strict mode
    10 │ 	test() {
  > 11 │ 		"use strict";
       │ 		^^^^^^^^^^^^^
    12 │ 	}
    13 │ }
  
  i The entire contents of JavaScript modules are automatically in strict mode, with no statement needed to initiate it.
  
  i Safe fix: Remove the redundant use strict directive.
  
     9  9 │   	// All code here is evaluated in strict mode
    10 10 │   	test() {
    11    │ - → → "use·strict";
    12    │ - → }
       11 │ + → → → }
    13 12 │   }
    14 13 │   
  

```

```
invalid.js:18:3 lint/suspicious/noRedundantUseStrict  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Redundant use strict directive.
  
    16 │ 	// All code here is evaluated in strict mode
    17 │ 	test() {
  > 18 │ 		"use strict";
       │ 		^^^^^^^^^^^^^
    19 │ 	}
    20 │ };
  
  i The entire contents of JavaScript modules are automatically in strict mode, with no statement needed to initiate it.
  
  i Safe fix: Remove the redundant use strict directive.
  
    16 16 │   	// All code here is evaluated in strict mode
    17 17 │   	test() {
    18    │ - → → "use·strict";
    19    │ - → }
       18 │ + → → → }
    20 19 │   };
    21 20 │   
  

```