---
source: crates/biome_formatter_test/src/snapshot_builder.rs
info: js/arrays/tuple-and-record.js
---

# Input

```js
a = [
  [1,2],
  [1,2],
]

a = [
  #[1,2],
  #[1,2],
]

a = [
  {a, b},
  {a, b},
]

a = [
  #{a, b},
  #{a, b},
]

```


# Prettier differences

```diff
--- Prettier
+++ Biome
@@ -4,9 +4,9 @@
 ];
 
 a = [
-  #[1, 2],
-  #[1, 2],
-];
+  #[1,2],
+  #[1,2],
+]
 
 a = [
   { a, b },
@@ -14,6 +14,6 @@
 ];
 
 a = [
-  #{ a, b },
-  #{ a, b },
-];
+  #{a, b},
+  #{a, b},
+]
```

# Output

```js
a = [
  [1, 2],
  [1, 2],
];

a = [
  #[1,2],
  #[1,2],
]

a = [
  { a, b },
  { a, b },
];

a = [
  #{a, b},
  #{a, b},
]
```

# Errors
```
tuple-and-record.js:7:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected an identifier but instead found '['.
  
    6 │ a = [
  > 7 │   #[1,2],
      │    ^
    8 │   #[1,2],
    9 │ ]
  
  i Expected an identifier here.
  
    6 │ a = [
  > 7 │   #[1,2],
      │    ^
    8 │   #[1,2],
    9 │ ]
  
tuple-and-record.js:7:3 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Private names are only allowed on the left side of a 'in' expression
  
    6 │ a = [
  > 7 │   #[1,2],
      │   ^
    8 │   #[1,2],
    9 │ ]
  
tuple-and-record.js:7:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × expected `,` but instead found `[`
  
    6 │ a = [
  > 7 │   #[1,2],
      │    ^
    8 │   #[1,2],
    9 │ ]
  
  i Remove [
  
tuple-and-record.js:8:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected an identifier but instead found '['.
  
     6 │ a = [
     7 │   #[1,2],
   > 8 │   #[1,2],
       │    ^
     9 │ ]
    10 │ 
  
  i Expected an identifier here.
  
     6 │ a = [
     7 │   #[1,2],
   > 8 │   #[1,2],
       │    ^
     9 │ ]
    10 │ 
  
tuple-and-record.js:8:3 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Private names are only allowed on the left side of a 'in' expression
  
     6 │ a = [
     7 │   #[1,2],
   > 8 │   #[1,2],
       │   ^
     9 │ ]
    10 │ 
  
tuple-and-record.js:8:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × expected `,` but instead found `[`
  
     6 │ a = [
     7 │   #[1,2],
   > 8 │   #[1,2],
       │    ^
     9 │ ]
    10 │ 
  
  i Remove [
  
tuple-and-record.js:17:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected an identifier but instead found '{'.
  
    16 │ a = [
  > 17 │   #{a, b},
       │    ^
    18 │   #{a, b},
    19 │ ]
  
  i Expected an identifier here.
  
    16 │ a = [
  > 17 │   #{a, b},
       │    ^
    18 │   #{a, b},
    19 │ ]
  
tuple-and-record.js:17:3 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Private names are only allowed on the left side of a 'in' expression
  
    16 │ a = [
  > 17 │   #{a, b},
       │   ^
    18 │   #{a, b},
    19 │ ]
  
tuple-and-record.js:17:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × expected `,` but instead found `{`
  
    16 │ a = [
  > 17 │   #{a, b},
       │    ^
    18 │   #{a, b},
    19 │ ]
  
  i Remove {
  
tuple-and-record.js:18:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected an identifier but instead found '{'.
  
    16 │ a = [
    17 │   #{a, b},
  > 18 │   #{a, b},
       │    ^
    19 │ ]
    20 │ 
  
  i Expected an identifier here.
  
    16 │ a = [
    17 │   #{a, b},
  > 18 │   #{a, b},
       │    ^
    19 │ ]
    20 │ 
  
tuple-and-record.js:18:3 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Private names are only allowed on the left side of a 'in' expression
  
    16 │ a = [
    17 │   #{a, b},
  > 18 │   #{a, b},
       │   ^
    19 │ ]
    20 │ 
  
tuple-and-record.js:18:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × expected `,` but instead found `{`
  
    16 │ a = [
    17 │   #{a, b},
  > 18 │   #{a, b},
       │    ^
    19 │ ]
    20 │ 
  
  i Remove {
  

```