parallel

The parallel function executes multiple asynchronous functions in parallel and returns a resolved Promise when all have finished.

Syntax

await parallel(...callbacks)

Parameters

Name	Type	Description
callbacks	Function[]	List of asynchronous functions to be executed.

Return Value

Type	Description
Promise	Resolves with an array of the results of all functions.

Examples

await parallel(
  () => fetch('/api/1'),
  () => fetch('/api/2'),
  () => fetch('/api/3')
);

// Or using then:
parallel(
  () => fetch('/api/1'),
  () => fetch('/api/2')
).then(results => console.log(results));

Notes

• Throws a TypeError if any of the arguments is not a function.
• Useful for executing asynchronous tasks simultaneously and waiting for all to complete.

References

• MDN: Promise.all()