Sunday, May 26, 2024

Get Browser Sort and Model in JavaScript

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On this Byte, we’ll see easy methods to detect a person’s browser kind and model utilizing JavaScript. This would possibly seem to be it must be a trivial process, however that is not at all times the case. It may be fairly useful when creating responsive and user-friendly net functions. We’ll be wanting into why it is necessary to determine a browser’s kind and model, after which we’ll delve into the strategies to get the browser kind and model.

Why Detect Browser Title and Model?

The reply lies within the various assist for various net applied sciences throughout completely different browsers and their variations. As an illustration, sure options of HTML5, CSS3, or JavaScript might not be supported or would possibly behave otherwise in numerous browsers. By detecting the browser identify and model, builders can present different options or warn customers about potential compatibility points.

Or perhaps you wish to present a hyperlink to a person for a browser extension. How will you understand which extension supplier to hyperlink to? Firefox Add-ons, or the Chrome Internet Retailer?

Getting Browser Title and Model in JavaScript

There are a pair alternative ways to get the browser identify and model in JavaScript. We’ll be taking a look at two strategies. The primary technique entails the usage of the navigator.userAgent property, and the second technique makes use of a 3rd social gathering library to do the be just right for you.

Methodology 1: Utilizing Navigator.userAgent Property

The navigator.userAgent property in JavaScript returns a string that represents the browser’s user-agent header. This string comprises details about the browser’s identify, model, and different particulars.

Here is an instance of how you should utilize this property to detect the browser identify and model:

var userAgent = navigator.userAgent; 


In the event you run this code in your browser’s console, it would print out a string that appears one thing like this:

"Mozilla/5.0 (Home windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"

This string tells us that the browser is Chrome and its model is 58.0.3029.110. Nevertheless, parsing this string to get the precise browser identify and model generally is a bit tough as a result of various codecs of user-agent strings throughout completely different browsers. Normally, builders use common expressions to parse this string and extract the required info.

Be aware: Whereas the navigator.userAgent property offers a fast and simple approach to detect the browser identify and model, it isn’t at all times dependable. Some browsers permit customers to alter the user-agent string, which may result in incorrect detection.

Methodology 2: Utilizing Browser Detection Libraries

In some circumstances, parsing the navigator.userAgent string can develop into fairly complicated, particularly when it is advisable to detect a variety of browser varieties and variations. That is the place browser detection libraries may be quite a lot of assist. They do the heavy lifting for you, making it simpler to determine the browser, its model, OS, and extra. One widespread library is ua-parser-js.

Let’s examine how we will use this library to get the browser identify and model:

// Import the ua-parser-js library
var UAParser = require('ua-parser-js');

// Create a brand new parser occasion
var parser = new UAParser();

// Get the browser identify and model
var consequence = parser.getResult();
console.log(consequence.browser); // Outputs: { identify: "Chrome", model: "89.0.4389.82" }

On this code, we first import the ua-parser-js library. We then create a brand new parser occasion and name the getResult() technique to get the browser info. The output is an object containing the browser identify and model.

There are different libraries that carry out browser detection by checking which options are current, which generally is a good different should you suspect the UA has been modified, however that is additionally a tough technique since browser options are always altering.

Potential Points with Browser Detection

Whereas browser detection generally is a useful gizmo, it isn’t with out its potential pitfalls. One of many major points, as we have talked about, is that the navigator.userAgent string may be simply spoofed or altered. Which means that relying solely on this string for browser detection could result in inaccurate outcomes.

One other difficulty is that browser detection can result in code complexity. If it’s a must to write completely different code for various browsers, your code base can rapidly develop into cluttered and more durable to keep up. This is the reason characteristic detection is commonly really useful over browser detection, relying in your use-case.

Use Instances for Browser Detection

Regardless of its potential points, there are fairly a number of legitimate use circumstances for browser detection. Let’s discover a few of them.

Internet Optimization

Some of the frequent use circumstances for browser detection is net optimization. By realizing the sort and model of the person’s browser, you may customise your web site to supply the absolute best expertise for that browser.

For instance, you would possibly use browser detection to serve completely different variations of your web site’s CSS or JavaScript information. If the person is on an older browser that does not assist sure options, you may serve a less complicated, extra suitable model of your web site.

// Instance: Serving completely different JavaScript information primarily based on the browser
if (consequence.browser.identify === "IE" && consequence.browser.model < "9.0") {
    // Serve a less complicated model of the JavaScript file for older IE browsers
} else {
    // Serve the common JavaScript file for different browsers

On this instance, we’re utilizing the ua-parser-js library to detect if the person is on an older model of Web Explorer. If they’re, we serve a less complicated model of the JavaScript file. In the event that they’re on a distinct browser, we serve the common JavaScript file.

Bear in mind, whereas browser detection generally is a useful gizmo for net optimization, it isn’t a silver bullet. All the time contemplate the potential points and use it judiciously.

Consumer Expertise Enhancement

On the earth of net improvement, person expertise (UX) is king. It is all about making a clean, intuitive, and pleasurable expertise to your customers, proper? That is the place browser detection can come into play.

Lets say you’ve got developed a characteristic that leverages the most recent Internet APIs. Nevertheless, these APIs aren’t supported by all browsers. As a substitute of leaving your customers with older browsers at midnight (and probably pissed off), you should utilize browser detection to supply them another, however nonetheless nice, expertise.

Here is an instance. Suppose you’ve got applied a characteristic utilizing the Internet Speech API, which isn’t supported in Web Explorer.

if (window.hasOwnProperty('SpeechRecognition') || window.hasOwnProperty('webkitSpeechRecognition')) {
    // Use the Internet Speech API
} else {
    // Present different technique

On this code, if the person’s browser helps the Internet Speech API, we go forward and use it. If not, we offer another technique that is suitable with their browser. This fashion, no person is left behind and everybody will get to get pleasure from your web site, whatever the browser they’re utilizing.

Be aware: All the time keep in mind to check your web site completely on varied browsers after implementing browser detection. This may be sure that your customers get the absolute best expertise, no matter their browser kind and model.


On this Byte, we have explored easy methods to detect a person’s browser kind and model in JavaScript. We have seen how we will use the navigator.userAgent property, in addition to browser detection libraries, to attain this. We have additionally mentioned potential points with browser detection and highlighted a few of its use circumstances, significantly in enhancing person expertise.

Whereas browser detection generally is a useful gizmo, it isn’t at all times the most effective resolution. Every time doable, use characteristic detection to see if the browser helps no matter characteristic you are wanting to make use of. Nevertheless, in circumstances the place browser-specific quirks or bugs come into play, or when coping with unsupported options, browser detection generally is a lifesaver.

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