---
source: crates/biome_formatter_test/src/snapshot_builder.rs
info: js/babel-plugins/module-blocks.js
---

# Input

```js
let m = module {
  export let m = 2;
  export let n = 3;
};

```


# Prettier differences

```diff
--- Prettier
+++ Biome
@@ -1,4 +1,5 @@
-let m = module {
+let m = module;
+{
   export let m = 2;
   export let n = 3;
-};
+}
```

# Output

```js
let m = module;
{
  export let m = 2;
  export let n = 3;
}
```

# Errors
```
module-blocks.js:1:16 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected a semicolon or an implicit semicolon after a statement, but found none
  
  > 1 │ let m = module {
      │                ^
    2 │   export let m = 2;
    3 │   export let n = 3;
  
  i An explicit or implicit semicolon is expected here...
  
  > 1 │ let m = module {
      │                ^
    2 │   export let m = 2;
    3 │   export let n = 3;
  
  i ...Which is required to end this statement
  
  > 1 │ let m = module {
      │ ^^^^^^^^^^^^^^^
    2 │   export let m = 2;
    3 │   export let n = 3;
  
module-blocks.js:2:3 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Illegal use of an export declaration not at the top level
  
    1 │ let m = module {
  > 2 │   export let m = 2;
      │   ^^^^^^^^^^^^^^^^^
    3 │   export let n = 3;
    4 │ };
  
  i move this declaration to the top level
  
module-blocks.js:3:3 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Illegal use of an export declaration not at the top level
  
    1 │ let m = module {
    2 │   export let m = 2;
  > 3 │   export let n = 3;
      │   ^^^^^^^^^^^^^^^^^
    4 │ };
    5 │ 
  
  i move this declaration to the top level
  

```