NODE-FLAG

Access to Node.js Command Line Flags

Require Node 4+

How To:

install the module:

$ npm install node-flag

import it:

const nodeFlags = require('node-flag')

use it:

// check if flag is set or not
console.log(nodeFlags.isset(/**[FLAG_TITLE]**/)) //returns boolean value

// get all command line flags
console.log(nodeFlags.getAll())

// get single (or all) command line flag
console.log(nodeFlags.get(/**[FLAG_TITLE]**/)) 
// if you don't set the flag title; all flags will be retured.

example:

# in Terminal:

$ node app.js --host 127.0.0.1 --port 3000
# OR
$ node app.js -h 127.0.0.1 -p 3000

# NOTE:
# if you use single hyphen (-) as flag title prefix 
# you can only set 1 character length flag title like -h but 
# if you want to set more than 1 character length flag title 
# you have to set double hyphens (--) as flag title prefix like --host  

// in your application:

'use strict'

const nodeFlags = require('node-flag')

//check if a specific flag is set or not
console.log(nodeFlags.isset('port')) //returns boolean value

// get all command line flags
console.log(nodeFlags.getAll())
/* result:
	{
		host: '127.0.0.1',
		port: '3000'
	}
	OR:
	{
		h: '127.0.0.1',
		p: '3000'
	}
*/

// get single command line flag
console.log(nodeFlags.get('port') // result: 3000
//OR
console.log(nodeFlags.get('p') // result: 3000

Only Get Valid/Required Flags:

if you want to filter getAll() or get() results with your valid/required flags just use validFlags() method before of them.

nodeFlags.validFlags('host')
//OR:
nodeFlags.validFlags(['host', 'port', 'h', 'p'])

Assigning Flag Titles:

$ node app.js -h 127.0.0.1 -p 3000

nodeFlags.assign({
	h: 'host',
	p: 'port'
})

console.log(nodeFlags.get('host')) 
// result: '127.0.0.1'

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