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What's Covered

This tutorial illustrates the basic use of the 51Degrees API. It will show you how to create a provider, how to create a dataset and how to obtain a value for the IsMobile property.

Code and Explanation

Getting started example of using 51Degrees device detection. The example shows how to:
  1. Set the configuration using a json object

    var config = {"dataFile" : "../data/51Degrees-LiteV3.2.dat",
                  "properties" : "IsMobile",
                  "cacheSize" : 10000,
                  "poolSize" : 4
  2. Instantiate the 51Degrees device detection provider with this connfiguration

    var provider = new fiftyonedegrees.provider(config);
  3. Produce a match for a single HTTP User-Agent header

    var match = provider.getMatch(userAgent);

  4. Extract the value of the IsMobile property

Full Source File
// Include 51Degrees.
var fiftyonedegrees = require("fiftyonedegreescore");

// Set the config.
var config = {"dataFile" : require("fiftyonedegreeslitepattern"),
              "properties" : "IsMobile",
              "cacheSize" : 10000,
              "poolSize" : 4,
              "stronglyTyped": false

// User-Agent string of an iPhone mobile device.
var mobileUserAgent = "Mozilla/5.0 (iPhone; CPU iPhone OS 7_1 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) 'Version/7.0 Mobile/11D167 Safari/9537.53";

// User-Agent string of Firefox Web browser version 41 on desktop.
var desktopUserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0";

// User-Agent string of a MediaHub device.
var mediaHubUserAgent = "Mozilla/5.0 (Linux; Android 4.4.2; X7 Quad Core Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/ Safari/537.36";

console.log("Starting Getting Started Example.");

Initialises the device detection provider with settings from the config.
By default this will use the packaged Lite data file. For more info see:
<a href="">compare data options
var provider = new fiftyonedegrees.provider(config);

// Carries out a match with a mobile User-Agent.
console.log("\nMobile User-Agent: " + mobileUserAgent);
var match = provider.getMatch(mobileUserAgent);
console.log("   IsMobile: " + match.IsMobile);

// Carries out a match with a desktop User-Agent.
console.log("\nDesktop User-Agent: " + desktopUserAgent);
var match = provider.getMatch(desktopUserAgent);
console.log("   IsMobile: " + match.IsMobile);

// Carries out a match with a MediaHub User-Agent.
console.log("\nMediaHub User-Agent: " + mediaHubUserAgent);
var match = provider.getMatch(mediaHubUserAgent);
console.log("   IsMobile: " + match.IsMobile);

Full Source File


In this tutorial you have seen how to use the detector to retrieve the IsMobile property for a pre-defined User-Agent string. The example can easily be modified to retrieve the value of any other property. Premium and Enterprise data files provide considerably more properties such as IsCrawler , PriceBand , HardwareVendor and ScreenInchesWidth . For a full list of properties and the data file versions they exist in please see the Property Dictionary .