express-langs

parse langs from request for easier use with express

resolve langagues accept in header request get array langagues with request.langs

Installation

npm install express-langs --save

yarn add express-langs

server.js

const
    exp = require('express')
    ,app  =exp()
    ,server = require('http').Server( app )
    ,langs = require('express-langs')
;

app
    // ... , you other middleware
    .use( langs )
    // you other middleware ... ,
;


app
    .get('/' , (req,res) => {

        /**
         * array<object>
         *  {
         *      lang: string
         *      ,val: float
         *  }
         */
        console.log( req.langs.items );

        res.send( 'hello world !' ) ;

    } )
;

server.listen( 80 , () => console.log('server run ...') ) ;

you can use methods test exists langs

const
    exp = require('express')
    ,app  =exp()
    ,server = require('http').Server( app )
    ,langs = require('express-langs')
;

app
    // ... , you other middleware
    .use( langs )
    // you other middleware ... ,
;


app
    .get('/' , (req,res) => {

        const langs = req.langs ;

        if( langs.exists( 'fr' ) ) {


            res.send( 'salut le monde !' ) ;

        } else {

            res.send('hello world') ;
        }

    } )
;

server.listen( 80 , () => console.log('server run ...') ) ;

exists methods make a relative test with langs found e.g :

langs.exists('en') ; // match with 'en-US'
langs.exists('en') ; // match with 'en'
langs.exists('en') ; // not match with 'fr'

or with an pattern e.g :

langs.exists( /en/i ) ; // match with 'en-US'
langs.exists( /en/i ) ; // match with 'en'

langs.exists( /en|fr/i ) ; // match with 'fr'

you can make a strict test exists e.g :

langs.existsStrict('en') ; // not match with 'en-US'
langs.existsStrict('en') ; // match with 'en'
langs.existsStrict('en') ; // not match with 'fr'

getWith method get array langs match with you support pattern

const supportLangs = langs.getWith( /en|fr|es/i ) ; // array[ langs ]

// you can give an string for build an pattern e.g :
const pattern = "en|fr|es" ;
const supportLangs = langs.getWith( pattern ) ; // array[ langs ]

develop by Samuel Gaborieau with <3 and NodeJS for Open Source and enjoy !