extract-opts
Advanced tools
Extract the options and callback from a function's arguments easily
var log = console.log.bind(console)
var extractOptsAndCallback = require('extract-opts')
// fs.readFile(filename, [options], callback)
function readFile(filename, opts, next) {
// Extract options and callback
var args = extractOptsAndCallback(opts, next)
opts = args[0]
next = args[1]
// Forward for simplicities sake
require('fs').readFile(filename, opts, next)
}
// Test it
readFile('package.json', log) // works with no options
readFile('package.json', null, log) // works with null options
readFile('package.json', { next: log }) // works with just options
Extract Options and Callback also supports a third argument.
You can use this third argument to customize the completionCallbackNames property that defaults to ['next'].
This is useful if your completion callback has other names besides next.
Allowing you to do the following:
var log = console.log.bind(console)
function extractOptsAndCallback(opts, next, config) {
if (config == null) config = {}
if (config.completionCallbackNames == null)
config.completionCallbackNames = ['next', 'complete', 'done']
return require('extract-opts')(opts, next, config)
}
// The readFile method as before
// Test it
readFile('package.json', { next: log }) // works the standard completion callback name
readFile('package.json', { complete: log }) // works with our custom completion callback name
readFile('package.json', { done: log }) // works with our custom completion callback name
npm install --save extract-optsimport * as pkg from ('extract-opts')const pkg = require('extract-opts')<script type="module">
import * as pkg from '//dev.jspm.io/extract-opts@5.9.0'
</script>
This package is published with the following editions:
extract-opts aliases extract-opts/index.cjs which uses the Editions Autoloader to automatically select the correct edition for the consumer's environmentextract-opts/source/index.js is ESNext source code for Node.js 6 || 8 || 10 || 12 || 14 || 16 || 18 || 20 || 21 with Require for modulesextract-opts/edition-browsers/index.js is ESNext compiled for web browsers with Require for modulesextract-opts/edition-node-4/index.js is ESNext compiled for Node.js 4 || 6 || 8 || 10 || 12 || 14 || 16 || 18 || 20 || 21 with Require for modulesDiscover the release history by heading on over to the HISTORY.md file.
Discover how to contribute via the CONTRIBUTING.md file.
Unless stated otherwise all works are:
and licensed under:
v5.9.0 2024 January 2
FAQs
Extract the options and callback from a function's arguments easily
The npm package extract-opts receives a total of 105,379 weekly downloads. As such, extract-opts popularity was classified as popular.
We found that extract-opts demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Research
The Socket Research Team breaks down a malicious wrapper package that uses obfuscation to harvest credentials and exfiltrate sensitive data.
Research
Security News
Attackers used a malicious npm package typosquatting a popular ESLint plugin to steal sensitive data, execute commands, and exploit developer systems.
Security News
The Ultralytics' PyPI Package was compromised four times in one weekend through GitHub Actions cache poisoning and failure to rotate previously compromised API tokens.