Pipeline operator

The experimental pipeline operator |> (currently at stage 1) allows the creation of chained function calls in a readable manner. Basically, the pipeline operator provides syntactic sugar on a function call with a single argument allowing you to write

'%21' |> decodeURI instead of decodeURI('%21').

Syntax

expression |> function

Examples

Chaining function calls

The pipeline operator can improve readability when chaining several functions.

const double = (n) => n * 2;
const increment = (n) => n + 1;

// without pipeline operator
double(increment(double(double(5)))); // 42

// with pipeline operator
5 |> double |> double |> increment |> double; // 42

Specifications

Browser compatibilityUpdate compatibility data on GitHub

See also

• TC39 proposals