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async-once

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    async-once

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


Version published
Weekly downloads
90
increased by21.62%
Maintainers
2
Install size
14.2 kB
Created
Weekly downloads
 

Changelog

Source

2.0.0 (2022-06-28)

⚠ BREAKING CHANGES

  • Normalize repository, dropping node <10.13 support (#10)

Miscellaneous Chores

  • Normalize repository, dropping node <10.13 support (#10) (7bcae07)

Readme

Source

async-once

NPM version Downloads Build Status Coveralls Status

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

Usage

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

var count = 0;

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

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

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

Keywords

FAQs

Last updated on 28 Jun 2022

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