@babel/plugin-proposal-async-generator-functions - npm Package Compare versions

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

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Comparing version 7.0.0-beta.49 to 7.0.0-beta.50

package.json

		{
		"name": "@babel/plugin-proposal-async-generator-functions",
		"version": "7.0.0-beta.49",
		"version": "7.0.0-beta.50",
		"description": "Turn async generator functions into ES2015 generators",
		@@ -12,5 +12,5 @@ "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-async-generator-functions",
		"dependencies": {
		"@babel/helper-plugin-utils": "7.0.0-beta.49",
		"@babel/helper-remap-async-to-generator": "7.0.0-beta.49",
		"@babel/plugin-syntax-async-generators": "7.0.0-beta.49"
		"@babel/helper-plugin-utils": "7.0.0-beta.50",
		"@babel/helper-remap-async-to-generator": "7.0.0-beta.50",
		"@babel/plugin-syntax-async-generators": "7.0.0-beta.50"
		},
		@@ -21,5 +21,5 @@ "peerDependencies": {
		"devDependencies": {
		"@babel/core": "7.0.0-beta.49",
		"@babel/helper-plugin-test-runner": "7.0.0-beta.49"
		"@babel/core": "7.0.0-beta.50",
		"@babel/helper-plugin-test-runner": "7.0.0-beta.50"
		}
		}

102

README.md

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

		> Turn async generator functions and for-await statements to ES2015 generators
		> Turn async generator functions into ES2015 generators

		## Example
		See our website [@babel/plugin-proposal-async-generator-functions](https://new.babeljs.io/docs/en/next/babel-plugin-proposal-async-generator-functions.html) for more information.

		In
		## Install

		```javascript
		async function* agf() {
		await 1;
		yield 2;
		}
		```
		Using npm:

		Out

		```javascript
		var _asyncGenerator = ...

		let agf = (() => {
		var _ref = _asyncGenerator.wrap(function* () {
		yield _asyncGenerator.await(1);
		yield 2;
		});

		return function agf() {
		return _ref.apply(this, arguments);
		};
		})();
		```

		For await example

		```js
		async function f() {
		for await (let x of y) {
		g(x);
		}
		}
		```

		Example Usage

		```js
		async function* genAnswers() {
		var stream = [ Promise.resolve(4), Promise.resolve(9), Promise.resolve(12) ];
		var total = 0;
		for await (let val of stream) {
		total += await val;
		yield total;
		}
		}

		function forEach(ai, fn) {
		return ai.next().then(function (r) {
		if (!r.done) {
		fn(r);
		return forEach(ai, fn);
		}
		});
		}

		var output = 0;
		forEach(genAnswers(), function(val) { output += val.value })
		.then(function () {
		console.log(output); // 42
		});
		```

		[Try it Out in the REPL](https://babeljs.io/repl/#?babili=false&evaluate=true&lineWrap=false&presets=stage-3&code=async%20function*%20genAnswers()%20%7B%0A%20%20var%20stream%20%3D%20%5B%20Promise.resolve(4)%2C%20Promise.resolve(9)%2C%20Promise.resolve(12)%20%5D%3B%0A%20%20var%20total%20%3D%200%3B%0A%20%20for%20await%20(let%20val%20of%20stream)%20%7B%0A%20%20%20%20total%20%2B%3D%20await%20val%3B%0A%20%20%20%20yield%20total%3B%0A%20%20%7D%0A%7D%0A%0Afunction%20forEach(ai%2C%20fn)%20%7B%0A%20%20return%20ai.next().then(function%20(r)%20%7B%0A%20%20%20%20if%20(!r.done)%20%7B%0A%20%20%20%20%20%20fn(r)%3B%0A%20%20%20%20%20%20return%20forEach(ai%2C%20fn)%3B%0A%20%20%20%20%7D%0A%20%20%7D)%3B%0A%7D%0A%0Avar%20output%20%3D%200%3B%0AforEach(genAnswers()%2C%20function(val)%20%7B%20output%20%2B%3D%20val.value%20%7D)%0A.then(function%20()%20%7B%0A%20%20console.log(output)%3B%20%2F%2F%2042%0A%7D)%3B&experimental=true&loose=false&spec=false&playground=true&stage=0)

		## Installation

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

		## Usage
		or using yarn:

		### Via `.babelrc` (Recommended)

		.babelrc

		```json
		{
		"plugins": ["@babel/plugin-proposal-async-generator-functions"]
		}
		```

		### Via CLI

		```sh
		babel --plugins @babel/plugin-proposal-async-generator-functions script.js
		yarn add --save @babel/plugin-proposal-async-generator-functions
		```

		### Via Node API

		```javascript
		require("@babel/core").transform("code", {
		plugins: ["@babel/plugin-proposal-async-generator-functions"]
		});
		```

		## References

		* [Proposal: Asynchronous iteration for ECMAScript](https://github.com/tc39/proposal-async-iteration)

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