async-once

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Guarantee a node-style async function is only executed once.

async-once 최신버젼 다운로드

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# async-once

[![NPM version][npm-image]][npm-url] [![Downloads][downloads-image]][npm-url] [![Build Status][ci-image]][ci-url] [![Coveralls Status][coveralls-image]][coveralls-url]

Guarantee a node-style async function is only executed once.

## Usage

```js
var once = require('async-once');

var count = 0;

var myAsyncFunc = once(function (cb) {
  count++;
  cb(null, count);
});

myAsyncFunc(function (err, result) {
  assert(result === 1);
});

assert(count === 1);
```

## API

### `once(fn)`

Takes a node-style async function (`fn`) to ensure it's only called once. The function should accept a callback as its last parameter which is called with `cb(err, result)`. Returns a function that can be called any number of times but will only execute once. Arguments passed to the returned function will be passed to the `fn`.

## License

MIT

[downloads-image]: https://img.shields.io/npm/dm/async-once.svg?style=flat-square
[npm-url]: https://www.npmjs.com/package/async-once
[npm-image]: https://img.shields.io/npm/v/async-once.svg?style=flat-square

[ci-url]: https://github.com/gulpjs/async-once/actions?query=workflow:dev
[ci-image]: https://img.shields.io/github/actions/workflow/status/gulpjs/async-once/dev.yml?branch=master&style=flat-square

[coveralls-url]: https://coveralls.io/r/gulpjs/async-once
[coveralls-image]: https://img.shields.io/coveralls/gulpjs/async-once/master.svg?style=flat-square

async-once

async-once 최신버젼 다운로드

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async-once

async-once 최신버젼 다운로드

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