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extract-opts
Advanced tools
Extract the options and callback from a function's arguments easily
npm install --save extract-opts
require('extract-opts')
<script type="module">
import * as pkg from '//dev.jspm.io/extract-opts'
</script>
This package is published with the following editions:
extract-opts
aliases extract-opts/source/index.js
extract-opts/source/index.js
is esnext source code with require for modulesextract-opts/edition-browsers/index.js
is esnext compiled for browsers with require for modulesvar 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
Discover the release history by heading on over to the HISTORY.md
file.
Discover how you can contribute by heading on over to the CONTRIBUTING.md
file.
These amazing people are maintaining this project:
No sponsors yet! Will you be the first?
These amazing people have contributed code to this project:
Discover how you can contribute by heading on over to the CONTRIBUTING.md
file.
Unless stated otherwise all works are:
and licensed under:
v4.3.0 2019 December 9
FAQs
Extract the options and callback from a function's arguments easily
The npm package extract-opts receives a total of 108,616 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.
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