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

Changelog

Source

v7.18.10 (2022-08-01)

:rocket: New Feature

babel-helper-string-parser, babel-types
- #14757 feat: Automatically generate cooked for templateElement (@liuxingbaoyu)

:bug: Bug Fix

babel-parser
- #14817 fix(parser): allow TS declare readonly fields with initializers (@Josh-Cena)
babel-helper-string-parser, babel-parser
- #14798 Fix position of errors in template literals after newlines (@nicolo-ribaudo)
babel-plugin-transform-typescript
- #14774 fix: TS declare class in namespace should be removed (@yimingjfe)
babel-plugin-transform-react-jsx
- #14759 fix: skip flattening spread object with proto (@JLHwung)
babel-generator
- #14762 fix: Types containing comments generate invalid code (@liuxingbaoyu)
babel-helper-wrap-function, babel-plugin-transform-async-to-generator, babel-traverse
- #14752 Fix compiling async arrows in uncompiled class fields (@nicolo-ribaudo)

:house: Internal

Other
- #14800 chore: Remove .yarnrc file (@liuxingbaoyu)
- #14802 chore: Fix coverage test (@liuxingbaoyu)
- #14671 feat: Make most make commands cross-platform (@liuxingbaoyu)
- #14790 enable typescript incremental builds (@zxbodya)
babel-traverse
- #14799 Restructure virtual types validator (@JLHwung)
babel-cli
- #14779 chore: expand prettier-e2e test and update typings/deps (@liuxingbaoyu)
babel-parser
- #14796 Make ParseError Much Simpler now that we can use TypeScript (@tolmasky)
babel-core, babel-parser
- #14785 chore: remove flow check scripts (@JLHwung)
babel-cli, babel-core, babel-parser, babel-plugin-transform-unicode-escapes, babel-preset-env, babel-template, babel-traverse
- #14783 Convert @babel/parser to TypeScript (@JLHwung)
babel-helper-string-parser, babel-parser
- #14772 Extract string parsing to a separate package (@nicolo-ribaudo)
babel-cli, babel-node
- #14765 Enforce type checking on babel-{cli,node} (@liuxingbaoyu)

:microscope: Output optimization

babel-plugin-proposal-export-default-from
- #14768 optimize: Simplify the export-default-from transform (@magic-akari)

Readme

Source