---
source: crates/biome_formatter_test/src/snapshot_builder.rs
info: js/babel-plugins/pipeline-operator-minimal.js
---

# Input

```js
// https://babeljs.io/docs/en/babel-plugin-proposal-pipeline-operator
// https://github.com/tc39/proposal-pipeline-operator/

let result = exclaim(capitalize(doubleSay("hello")));
result //=> "Hello, hello!"

let result = "hello"
  |> doubleSay
  |> capitalize
  |> exclaim;

result //=> "Hello, hello!"

```


# Prettier differences

```diff
--- Prettier
+++ Biome
@@ -4,6 +4,9 @@
 let result = exclaim(capitalize(doubleSay("hello")));
 result; //=> "Hello, hello!"
 
-let result = "hello" |> doubleSay |> capitalize |> exclaim;
+let result = "hello"
+  |> doubleSay
+  |> capitalize
+  |> exclaim;
 
 result; //=> "Hello, hello!"
```

# Output

```js
// https://babeljs.io/docs/en/babel-plugin-proposal-pipeline-operator
// https://github.com/tc39/proposal-pipeline-operator/

let result = exclaim(capitalize(doubleSay("hello")));
result; //=> "Hello, hello!"

let result = "hello"
  |> doubleSay
  |> capitalize
  |> exclaim;

result; //=> "Hello, hello!"
```

# Errors
```
pipeline-operator-minimal.js:8:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected an expression for the left hand side of the `>` operator.
  
     7 │ let result = "hello"
   > 8 │   |> doubleSay
       │    ^
     9 │   |> capitalize
    10 │   |> exclaim;
  
  i This operator requires a left hand side value
  
pipeline-operator-minimal.js:9:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected an expression for the left hand side of the `>` operator.
  
     7 │ let result = "hello"
     8 │   |> doubleSay
   > 9 │   |> capitalize
       │    ^
    10 │   |> exclaim;
    11 │ 
  
  i This operator requires a left hand side value
  
pipeline-operator-minimal.js:10:4 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × Expected an expression for the left hand side of the `>` operator.
  
     8 │   |> doubleSay
     9 │   |> capitalize
  > 10 │   |> exclaim;
       │    ^
    11 │ 
    12 │ result //=> "Hello, hello!"
  
  i This operator requires a left hand side value
  

```