---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.js
---
# Input
```jsx
switch (foo) {
	case 0:
	default:
		break;
	case 3:
		break;
}

switch (foo) {
	/* before */case 0:/* after */
	// comment for default
	default:
	case 1:
	case 2:/* statements */
		break;
	case 3:
		break;
}
```

# Diagnostics
```
invalid.js:2:2 lint/complexity/noUselessSwitchCase  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Useless case clause.
  
    1 │ switch (foo) {
  > 2 │ 	case 0:
      │ 	^^^^^^^
    3 │ 	default:
    4 │ 		break;
  
  i because the default clause is present:
  
    1 │ switch (foo) {
    2 │ 	case 0:
  > 3 │ 	default:
      │ 	^^^^^^^^
  > 4 │ 		break;
      │ 		^^^^^^
    5 │ 	case 3:
    6 │ 		break;
  
  i Unsafe fix: Remove the useless case.
  
     1  1 │   switch (foo) {
     2    │ - → case·0:
     3    │ - → default:
        2 │ + → default:
     4  3 │   		break;
     5  4 │   	case 3:
  

```

```
invalid.js:10:14 lint/complexity/noUselessSwitchCase  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Useless case clause.
  
     9 │ switch (foo) {
  > 10 │ 	/* before */case 0:/* after */
       │ 	            ^^^^^^^
    11 │ 	// comment for default
    12 │ 	default:
  
  i because the default clause is present:
  
    10 │ 	/* before */case 0:/* after */
    11 │ 	// comment for default
  > 12 │ 	default:
       │ 	^^^^^^^^
    13 │ 	case 1:
    14 │ 	case 2:/* statements */
  
  i Unsafe fix: Remove the useless case.
  
     8  8 │   
     9  9 │   switch (foo) {
    10    │ - → /*·before·*/case·0:/*·after·*/
    11    │ - → //·comment·for·default
       10 │ + → //·comment·for·default
    12 11 │   	default:
    13 12 │   	case 1:
  

```

```
invalid.js:13:2 lint/complexity/noUselessSwitchCase  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Useless case clause.
  
    11 │ 	// comment for default
    12 │ 	default:
  > 13 │ 	case 1:
       │ 	^^^^^^^
    14 │ 	case 2:/* statements */
    15 │ 		break;
  
  i because the default clause is present:
  
    10 │ 	/* before */case 0:/* after */
    11 │ 	// comment for default
  > 12 │ 	default:
       │ 	^^^^^^^^
    13 │ 	case 1:
    14 │ 	case 2:/* statements */
  
  i Unsafe fix: Remove the useless case.
  
    11 11 │   	// comment for default
    12 12 │   	default:
    13    │ - → case·1:
    14    │ - → case·2:/*·statements·*/
       13 │ + → case·2:/*·statements·*/
    15 14 │   		break;
    16 15 │   	case 3:
  

```

```
invalid.js:14:2 lint/complexity/noUselessSwitchCase  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Useless case clause.
  
    12 │ 	default:
    13 │ 	case 1:
  > 14 │ 	case 2:/* statements */
       │ 	^^^^^^^^^^^^^^^^^^^^^^^
  > 15 │ 		break;
       │ 		^^^^^^
    16 │ 	case 3:
    17 │ 		break;
  
  i because the default clause is present:
  
    10 │ 	/* before */case 0:/* after */
    11 │ 	// comment for default
  > 12 │ 	default:
       │ 	^^^^^^^^
    13 │ 	case 1:
    14 │ 	case 2:/* statements */
  
  i Unsafe fix: Remove the useless case.
  
     9  9 │   switch (foo) {
    10 10 │   	/* before */case 0:/* after */
    11    │ - → //·comment·for·default
    12    │ - → default:
    13    │ - → case·1:
    14    │ - → case·2:/*·statements·*/
       11 │ + → case·1:
       12 │ + → default:/*·statements·*/
    15 13 │   		break;
    16 14 │   	case 3:
  

```