NODEJS detect computer, tablet and mobile nodejs - Net-Raft.com

var express = require('express');
var app = express(),
useragent = require('express-useragent');

app.get('/', function(req, res){

var source = req.headers['user-agent'];
var info = useragent.parse(source);
var str = info['source'].toLowerCase();
var myArray1 = ["trident", "msie 10", "msie 9", "msie 8", "edge", "windows.*firefox", "windows.*chrome", "x11.*chrome", "x11.*firefox", "macintosh.*chrome", "macintosh.*firefox", "opera", "safari"];
var myArray2 = ["tablet", "android", "ipad", "tablet.*firefox"];
var myArray3 = ["mobile ", "android.*mobile", "iphone", "ipod", "opera mobi", "opera mini"];
var regex1, regex2, regex3;
var text;

for (var y = 0; y < myArray1.length; y++) {

regex1 = new RegExp(myArray1[y], "i"); // here set a variable regex
if (str.match(regex1)) {
text = 'COMPUTER'
}

for (var t = 0; t < myArray2.length; t++) {

regex2 = new RegExp(myArray2[t], "i"); // here set a variable regex
if (str.match(regex2)) {
text = 'TABLET'
}

}

for (var v = 0; v < myArray3.length; v++) {

regex3 = new RegExp(myArray3[v], "i"); // here set a variable regex
if (str.match(regex3)) {
text = 'MOBILE'
}

}

}

res.end(text);

})

app.listen(3000);
console.log("Listening to Port 3000");