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Express.js – req.acceptsLanguage() Method
The req.acceptsLanguage() method returns the first accepted language out of the specified languages based on the request's Accept-Language HTTP header field. This method returns 'false' if none of the specified language is accepted.
Syntax
req.acceptsLanguage ( lang, [...] )
Example 1
Create a file with the name "reqLang.js" and copy the following code snippet. After creating the file, use the command "node reqLang.js" to run this code as shown in the example below −
// req.acceptsLanguage(lang, [...]) Method Demo Example
// Importing the express module
var express = require('express');
// Initializing the express and port number
var app = express();
// Initializing the router from express
var router = express.Router();
var PORT = 3000;
// Defining an endpoint
app.get('/api', function (req, res) {
console.log(req.acceptsLanguages('en-IN'));
console.log(req.get('accept-language'));
res.end();
});
app.listen(PORT, function(err){
if (err) console.log(err);
console.log("Server listening on PORT", PORT);
});Hit the Endpoint "localhost:3000/api" with a GET request and set the following property in the header: Accept-Language = en-IN
Output
C:\home
ode>> node reqLang.js Server listening on PORT 3000 en-IN en-IN
Example 2
Let's take a look at one more example.
// req.acceptsLanguage(lang, [...]) Method Demo Example
// Importing the express module
var express = require('express');
// Initializing the express and port number
var app = express();
// Initializing the router from express
var router = express.Router();
var PORT = 3000;
// Defining an endpoint
app.get('/api', function (req, res) {
console.log("Is Language of Accepted type: ", req.acceptsLanguages('en-IN', 'en-US'));
console.log("Language passed -- ", req.get('accept-language'));
res.end();
});
app.listen(PORT, function(err){
if (err) console.log(err);
console.log("Server listening on PORT", PORT);
});Output
Hit the Endpoint "localhost:3000/api" with a GET Request and set the following property in the headers: Accept-Language = fr-CH
C:\home
ode>> node reqLang.js Server listening on PORT 3000 Is Language of Accepted type: false Language passed -- fr-CH
Updated on: 06-Apr-2022
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