accept-language

accept-language

accept-language parses HTTP Accept-Language header and returns a consumable array of language codes.

Installation:

npm install accept-language --save

Usage:

var acceptLanguage = require('accept-language');
var language = acceptLanguage.parse('en-GB,en;q=0.8,sv');

console.log(language);

Output:

[
  {
    code: "en",
    region: "GB",
    quality: 1.0
  },
  {
    code: "sv",
    region: undefined,
    quality: 1.0
  },
  {
    code: "en",
    region: undefined,
    quality: 0.8
  }
];

Filter non-defined language codes:

var acceptLanguage = require('accept-language');
acceptLanguage.codes(['en', 'zh']);
var language = acceptLanguage.parse('en-GB,en;q=0.8,sv');

console.log(language);

Output:

[
  {
    code: "en",
    region: "GB",
    quality: 1.0
  },
  {
    code: "en",
    region: undefined,
    quality: 0.8
  }
];

Use default value:

var acceptLanguage = require('accept-language');
acceptLanguage.default({
    code : 'en',
    region : 'US'
    // No need to specify quality
});
acceptLanguage.codes(['en', 'zh']);
var language = acceptLanguage.parse('fr-CA');

console.log(language);

Output:

[
  {
    code: "en",
    region: "US",
    quality: 1.0
  }
];

The output is always sorted with the highest quality first.