@babel/plugin-proposal-async-generator-functions

What is @babel/plugin-proposal-async-generator-functions?

The @babel/plugin-proposal-async-generator-functions package is a Babel plugin that allows you to use async generator functions and for-await-of loops in your JavaScript code, which are part of the ECMAScript 2018 (ES9) specification. This plugin transforms async generator functions and for-await-of loops into code that can run in environments that do not support these features natively.

What are @babel/plugin-proposal-async-generator-functions's main functionalities?

Async Generator Functions

This feature allows you to define asynchronous generator functions using the async function* syntax. These functions can yield values using the yield keyword, and they return an AsyncIterator which can be used with for-await-of loops.

async function* asyncGenerator() {
  var i = 0;
  while (i < 3) {
    yield i++;
  }
}

For-Await-Of Loops

This feature enables you to iterate over AsyncIterables using a for-await-of loop. The loop will wait for each promise returned by the AsyncIterable to resolve before continuing to the next iteration.

async function iterateAsyncGenerator() {
  for await (const value of asyncGenerator()) {
    console.log(value);
  }
}

Other packages similar to @babel/plugin-proposal-async-generator-functions

regenerator-runtime

The regenerator-runtime package provides a runtime for Regenerator-compiled generator and async functions. It is similar to @babel/plugin-proposal-async-generator-functions in that it allows you to use generators and async functions in environments that do not support them natively. However, it is a runtime library rather than a compile-time Babel plugin.

babel-preset-env

babel-preset-env is a Babel preset that includes various plugins to transpile modern JavaScript to backwards-compatible versions. It includes plugins for async functions and generators, similar to @babel/plugin-proposal-async-generator-functions, but it is more comprehensive as it covers a wider range of JavaScript features and proposals.

README

@babel/plugin-proposal-async-generator-functions

Turn async generator functions into ES2015 generators

See our website @babel/plugin-proposal-async-generator-functions for more information.

Install

Using npm:

npm install --save-dev @babel/plugin-proposal-async-generator-functions

or using yarn:

yarn add @babel/plugin-proposal-async-generator-functions --dev