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How to detect the user browser ( Safari, Chrome, IE, Firefox and Opera ) using JavaScript ?

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Browser detection using the user agent

Serving different Web pages or services to different browsers is usually a bad idea. The Web is meant to be accessible to everyone, regardless of which browser or device they're using. There are ways to develop your website to progressively enhance itself based on the availability of features rather than by targeting specific browsers.

But browsers and standards are not perfect, and there are still some edge cases where detecting the browser is needed. Using the user agent to detect the browser looks simple, but doing it well is, in fact, a very hard problem. This document will guide you in doing this as correctly as possible.

Note: It's worth re-iterating: it's very rarely a good idea to use user agent sniffing. You can almost always find a better, more broadly compatible way to solve your problem!

Considerations before using browser detection

When considering using the user agent string to detect which browser is being used, your first step is to try to avoid it if possible. Start by trying to identify why you want to do it.

Look, or ask, in specialized forums: you're unlikely to be the first to hit this problem. Also, experts, or people with another point of view, can give you ideas for working around the bug. If the problem seems uncommon, it's worth checking if this bug has been reported to the browser vendor via their bug tracking system ( Mozilla ; WebKit ; Blink ; Opera ). Browser makers do pay attention to bug reports, and the analysis may hint about other workarounds for the bug.

Your site needs to use a specific Web feature that some browsers don't yet support, and you want to send those users to an older website with fewer features but that you know will work. This is the worst reason to use user agent detection because odds are eventually all the other browsers will catch up. In addition, it is not practical to test every one of the less popular browsers and test for those Web features. You should never do user agent sniffing. There is always the alternative of doing feature detection instead.

This is usually a bad practice, but there are some cases in which this is necessary. In these cases, you should first analyze your situation to be sure it's really necessary. Can you prevent it by adding some non-semantic <div> or <span> elements? The difficulty of successfully using user agent detection is worth a few disruptions to the purity of your HTML. Also, rethink your design: can you use progressive enhancement or fluid layouts to help remove the need to do this?

Avoiding user agent detection

If you want to avoid using user agent detection, you have options!

Feature detection is where you don't try to figure out which browser is rendering your page, but instead, you check to see if the specific feature you need is available. If it's not, you use a fallback. In those rare cases where behavior differs between browsers, instead of checking the user agent string, you should instead implement a test to detect how the browser implements the API and determine how to use it from that. An example of feature detection is as follows. In 2017, Chrome unflagged experimental lookbehind support in regular expressions , but no other browser supported it. So, you might have thought to do this:

The above code would have made several incorrect assumptions: First, it assumed that all user agent strings that include the substring "Chrome" are Chrome. UA strings are notoriously misleading. Then, it assumed that the lookbehind feature would always be available if the browser was Chrome. The agent might be an older version of Chrome, from before support was added, or (because the feature was experimental at the time) it could be a later version of Chrome that removed it. Most importantly, it assumed no other browsers would support the feature. Support could have been added to other browsers at any time, but this code would have continued choosing the inferior path.

Problems like these can be avoided by testing for support of the feature itself instead:

As the above code demonstrates, there is always a way to test browser support without user agent sniffing. There is never any reason to check the user agent string for this.

Lastly, the above code snippets bring about a critical issue with cross-browser coding that must always be taken into account. Don't unintentionally use the API you are testing for in unsupported browsers. This may sound obvious and simple, but sometimes it is not. For example, in the above code snippets, using lookbehind in short-regexp notation (for example, /reg/igm) will cause a parser error in unsupported browsers. Thus, in the above example, you would use new RegExp("(?<=look_behind_stuff)"); instead of /(?<=look_behind_stuff)/ , even in the lookbehind supported section of your code.

This design technique involves developing your website in 'layers', using a bottom-up approach, starting with a simpler layer and improving the capabilities of the site in successive layers, each using more features.

This is a top-down approach in which you build the best possible site using all the features you want, then tweak it to make it work on older browsers. This can be harder to do, and less effective, than progressive enhancement, but may be useful in some cases.

Arguably the most common use and misuse of user agent sniffing is to detect if the device is a mobile device. However, people too often overlook what they are really after. People use user agent sniffing to detect if the users' device is touch-friendly and has a small screen so they can optimize their website accordingly. While user agent sniffing can sometimes detect these, not all devices are the same: some mobile devices have big screen sizes, some desktops have a small touchscreen, some people use smart TV's which are an entirely different ballgame altogether, and some people can dynamically change the width and height of their screen by flipping their tablet on its side! So, user agent sniffing is definitely not the way to go. Thankfully, there are much better alternatives. Use Navigator.maxTouchPoints to detect if the user's device has a touchscreen. Then, default back to checking the user agent screen only if (!("maxTouchPoints" in navigator)) { /*Code here*/} . Using this information of whether the device has a touchscreen, do not change the entire layout of the website just for touch devices: you will only create more work and maintenance for yourself. Rather, add in touch conveniences such as bigger, more easily clickable buttons (you can do this using CSS by increasing the font size). Here is an example of code that increases the padding of #exampleButton to 1em on mobile devices.

As for the screen size, use window.innerWidth and window.addEventListener("resize", () => { /*refresh screen size dependent things*/ }). What you want to do for screen size is not slash off information on smaller screens. That will only annoy people because it will force them to use the desktop version. Rather, try to have fewer columns of information in a longer page on smaller screens while having more columns with a shorter page on larger screen sizes. This effect can be easily achieved using CSS flexboxes , sometimes with floats as a partial fallback.

Also try to move less relevant/important information down to the bottom and group the page's content together meaningfully. Although it is off-topic, perhaps the following detailed example might give you insights and ideas that persuade you to forgo user agent sniffing. Let us imagine a page composed of boxes of information; each box is about a different feline breed or canine breed. Each box has an image, an overview, and a historical fun fact. The pictures are kept to a maximum reasonable size even on large screens. For the purposes of grouping the content meaningfully, all the cat boxes are separated from all the dog boxes such that the cat and dog boxes are not intermixed together. On a large screen, it saves space to have multiple columns to reduce the space wasted to the left and to the right of the pictures. The boxes can be separated into multiple columns via two equally fair method. From this point on, we shall assume that all the dog boxes are at the top of the source code, that all the cat boxes are at the bottom of the source code, and that all these boxes have the same parent element. There a single instance of a dog box immediately above a cat box, of course. The first method uses horizontal Flexboxes to group the content such that when the page is displayed to the end user, all the dogs boxes are at the top of the page and all the cat boxes are lower on the page. The second method uses a Column layout and resents all the dogs to the left and all the cats to the right. Only in this particular scenario, it is appropriate to provide no fallback for the flexboxes/multicolumns, resulting in a single column of very wide boxes on old browsers. Also consider the following. If more people visit the webpage to see the cats, then it might be a good idea to put all the cats higher in the source code than the dogs so that more people can find what they are looking for faster on smaller screens where the content collapses down to one column.

Next, always make your code dynamic. The user can flip their mobile device on its side, changing the width and height of the page. Or, there might be some weird flip-phone-like device thing in the future where flipping it out extends the screen. Do not be the developer having a headache over how to deal with the flip-phone-like device thing. Never be satisfied with your webpage until you can open up the dev tools side panel and resize the screen while the webpage looks smooth, fluid, and dynamically resized. The simplest way to do this is to separate all the code that moves content around based on screen size to a single function that is called when the page is loaded and at each resize event thereafter. If there is a lot calculated by this layout function before it determines the new layout of the page, then consider debouncing the event listener such that it is not called as often. Also note that there is a huge difference between the media queries (max-width: 25em) , not all and (min-width: 25em) , and (max-width: 24.99em) : (max-width: 25em) excludes (max-width: 25em) , whereas not all and (min-width: 25em) includes (max-width: 25em) . (max-width: 24.99em) is a poor man's version of not all and (min-width: 25em) : do not use (max-width: 24.99em) because the layout might break on very high font sizes on very high definition devices in the future. Always be very deliberate about choosing the right media query and choosing the right >=, <=, >, or < in any corresponding JavaScript because it is very easy to get these mixed up, resulting in the website looking wonky right at the screen size where the layout changes. Thus, thoroughly test the website at the exact widths/heights where layout changes occur to ensure that the layout changes occur properly.

Making the best of user agent sniffing

After reviewing all of the above better alternatives to user agent sniffing, there are still some potential cases where user agent sniffing is appropriate and justified.

One such case is using user agent sniffing as a fallback when detecting if the device has a touch screen. See the Mobile Device Detection section for more information.

Another such case is for fixing bugs in browsers that do not automatically update. Webkit (on iOS) is a perfect example. Apple forces all of the browsers on IOS to use Webkit internally, thus the user has no way to get a better more updated browser on older devices. Most bugs can be detected, but some bugs take more effort to detect than others. In such cases, it might be beneficial to use user agent sniffing to save on performance. For example, Webkit 6 has a bug whereby when the device orientation changes, the browser might not fire MediaQueryList listeners when it should. To overcome this bug, observe the code below.

Which part of the user agent contains the information you are looking for?

As there is no uniformity of the different part of the user agent string, this is the tricky part.

Browser Name and version

When people say they want "browser detection", often they actually want "rendering engine detection". Do you actually want to detect Firefox, as opposed to SeaMonkey, or Chrome as opposed to Chromium? Or do you actually want to see if the browser is using the Gecko or the WebKit rendering engine? If this is what you need, see further down the page.

Most browsers set the name and version in the format BrowserName/VersionNumber . But as the name is not the only information in a user agent string that is in that format, you can not discover the name of the browser, you can only check if the name you are looking for. But note that some browsers are lying: Chrome for example reports both as Chrome and Safari. So to detect Safari you have to check for the Safari string and the absence of the Chrome string, Chromium often reports itself as Chrome too or Seamonkey sometimes reports itself as Firefox.

Also, pay attention not to use a simple regular expression on the BrowserName, user agents also contain strings outside the Keyword/Value syntax. Safari & Chrome contain the string 'like Gecko', for instance.

[1] Safari gives two version numbers: one technical in the Safari/xyz token, and one user-friendly in a Version/xyz token.

Of course, there is absolutely no guarantee that another browser will not hijack some of these things (like Chrome hijacked the Safari string in the past). That's why browser detection using the user agent string is unreliable and should be done only with the check of the version number (hijacking of past versions is less likely).

Rendering engine

As seen earlier, in most cases, looking for the rendering engine is a better way to go. This will help to not exclude lesser known browsers. Browsers sharing a common rendering engine will display a page in the same way: it is often a fair assumption that what will work in one will work in the other.

There are three active major rendering engines: Blink, Gecko, and WebKit. As sniffing the rendering engines names is common, a lot of user agents added other rendering names to trigger detection. It is therefore important to pay attention not to trigger false-positives when detecting the rendering engine.

Rendering engine version

Most rendering engines put the version number in the RenderingEngine/VersionNumber token, with the notable exception of Gecko. Gecko puts the Gecko version number in the comment part of the User Agent after the rv: string. From Gecko 14 for the mobile version and Gecko 17 for the desktop version, it also puts this value in the Gecko/version token (previous version put there the build date, then a fixed date called the GeckoTrail).

The Operating System is given in most User Agent strings (although not web-focused platforms like Firefox OS), but the format varies a lot. It is a fixed string between two semicolons, in the comment part of the User Agent. These strings are specific for each browser. They indicate the OS, but also often its version and information on the relying hardware (32 or 64 bits, or Intel/PPC for Mac).

Like in all cases, these strings may change in the future, one should use them only in conjunction with the detection of already released browsers. A technological survey must be in place to adapt the script when new browser versions are coming out.

Mobile, Tablet or Desktop

The most common reason to perform user agent sniffing is to determine which type of device the browser runs on. The goal is to serve different HTML to different device types.

  • Never assume that a browser or a rendering engine only runs on one type of device. Especially don't make different defaults for different browsers or rendering engines.
  • Never use the OS token to define if a browser is on mobile, tablet or desktop. The OS may run on more than one type of device (for example, Android runs on tablets as well as phones).

The following table summarizes the way common browser vendors indicate that their browsers are running on a mobile device:

In summary, we recommend looking for the string Mobi anywhere in the User Agent to detect a mobile device.

Note: If the device is large enough that it's not marked with Mobi , you should serve your desktop site (which, as a best practice, should support touch input anyway, as more desktop machines are appearing with touchscreens).

how to detect safari browser in javascript

Answered on: Saturday 26 August, 2023 / Duration: 22 min read

Programming Language: JavaScript , Popularity : 8/10

JavaScript Programming on www.codeease.net

Solution 1:

To detect the Safari browser in JavaScript, you can use the navigator.userAgent property, which contains information about the user agent string of the browser. The user agent string typically includes information about the browser, its version, and the operating system being used.

Here's how you can detect Safari browser in JavaScript:

Let's break down the code:

1. We start by creating a regular expression ( /^((?!chrome|android).)*safari/i ) that checks if the user agent string contains the word "safari" but not "chrome" or "android". This is done using negative lookahead assertions (?!chrome|android) to exclude those browsers.

2. The regular expression is then tested against the navigator.userAgent string using the .test() method.

3. The result is stored in the isSafari variable, which will be true if the user agent string matches the regular expression and false otherwise.

Now, let's see some code examples and outputs to better understand how this works:

Example 1: When running in Safari:

Example 2: When running in Chrome:

Example 3: When running on an Android device:

In these examples, we use console.log() to print the value of isSafari to the console. If isSafari is true , it means the code is running in Safari, and if it's false , it means it's running in a different browser.

Note that user agent strings can be manipulated or changed by users or browser extensions, so this method may not be 100% reliable. It's always a good idea to consider other methods for feature detection or to use a well-established library like Modernizr for more accurate browser detection.

Solution 2:

To detect the Safari browser in JavaScript, you can use the navigator.userAgent property along with regular expressions to match the Safari browser's user agent string. Here's an example code snippet that demonstrates how to detect Safari and get its version:

Here are some possible outputs:

1. If the user is using Safari version 14.0:

2. If the user is using Chrome or any other browser:

Note that user agent strings can be modified, so this method may not always be reliable. It's always recommended to use feature detection instead of browser detection whenever possible.

Solution 3:

There are several ways to detect the Safari browser in JavaScript, here are a few methods:

1. User Agent String Method:

The user agent string is a piece of information that is sent along with every HTTP request, it contains information about the browser, operating system, device, and other details. You can check the user agent string to see if it includes the keyword "Safari" to determine if the current browser is Safari.

2. Browser Object Method:

You can also use the navigator.browser property to detect Safari. This method is less reliable than checking the user agent string as it can be spoofed or modified by the user.

3. Feature Detection Method:

Another way to detect Safari is by testing for the presence of certain features that are specific to Safari. For example, you can check if the orientation property is supported, which is not available in all browsers but is available in Safari.

4. Polyfill Method:

If you want to support older versions of Safari that don't have the orientation property, you can use a polyfill to add support for it. Then you can use the feature detection method above.

It's worth noting that feature detection is generally considered a more robust and future-proof way of detecting browsers compared to user agent sniffing. However, in some cases, user agent sniffing may still be necessary, especially when dealing with legacy browsers.

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How to Detect Mobile Browser in JavaScript

Satvik Jagannath

Introduction

Stepping into the world of web development, I’ve come across myriad challenges that have helped shape my skills and understanding. One such challenge, which we’ll be delving into today, is detecting a mobile browser in JavaScript. As we witness an ever-increasing shift towards mobile browsing, ensuring our web applications are compatible and responsive to mobile browsers is paramount. So, stick with me as we unravel the process of detecting a mobile browser using JavaScript.

In this post, we will learn how to detect a mobile browser using JavaScript. There are various ways to detect a mobile browser. We will discuss some of the most popular methods.

It is quite common for websites to want to know if their visitors are using a mobile device. This can be used to tailor the user experience, for example by displaying a simplified version of the site. It can also be used to detect if the user is on a low-end device and serve them a low-resolution image instead of a high-resolution one.

10 reasons to detect a mobile browser – use cases of detecting a mobile browser

As a web developer, you might want to detect whether the website visitor is using a mobile browser. This is important because you might want to:

Sure, here are those points rewritten in a more concise way:

  • Adaptive Design:  Detecting a mobile browser allows me to use an adaptive design that modifies the website’s layout and visuals for optimum viewing and interaction on any device.
  • Loading Speed Optimization:  Identifying mobile users enables me to optimize my site’s loading speed by simplifying page elements and prioritizing important content.
  • Touch Interactions:  Knowing a user is on a mobile device lets me make interactive elements like buttons and menus more touch-friendly.
  • App Promotion:  If I have a corresponding mobile app, detecting a mobile browser allows me to promote it to users for a possibly improved mobile experience.
  • Data Consumption:  Recognizing mobile users helps me reduce data consumption by compressing images or omitting less-critical elements on the mobile version of the site.
  • Location-Based Services:  Detecting a mobile browser allows me to offer location-based services or content tailored to the user’s geographical location.
  • Better Analytics:  Tracking the number of users on mobile versus desktop browsers provides valuable insights for future design or content modifications.
  • Serve Different Content:  I can enhance mobile user experience by serving different, often less, content to mobile users.
  • Blocking Access to Certain Features:  Some features unsuitable for mobile users can be blocked to simplify their browsing experience.
  • Track Mobile Traffic Separately:  Tracking mobile traffic separately from desktop traffic helps uncover usage patterns specific to mobile users, informing future optimizations and marketing strategies.

In all these strategies, my primary goal is to enhance the user experience for mobile users. I want to ensure that they find my site easy to use, valuable, and engaging, regardless of the device they’re using to access it. As with the previous strategies, all of these measures must respect user privacy and comply with relevant data protection and privacy laws.

How to Detect a Mobile Browser?

As a web developer, there are several ways I can discern whether a visitor to my website is using a mobile device or not. Here’s one approach that I’ve found to be quite straightforward and effective:

Method 1: Using the User-Agent, navigator.userAgentData

The User-Agent, an integral part of the browser’s identity, is typically my first go-to tool for detecting a mobile browser. This piece of data is like a digital passport provided by the visitor’s browser to my website, sharing information about the type of browser in use, the operating system, and more.

In more technical terms, the User-Agent is a request header that the client (or in this case, the browser) sends to the server (my website). It’s a brief summary of key details about the client, such as the operating system in use (like Android or iOS), the browser type (like Chrome or Safari), and their respective versions. This little packet of information is valuable because it allows me, as a web developer, to fine-tune the content that I serve to the client, ensuring an optimal browsing experience on my website.

Now, you might be wondering, how exactly do I use the User-Agent to detect a mobile browser? Well, it’s simpler than it might seem. I focus on the user-agent strings of most mobile browsers, which usually contain indicators like “Mobile” or “Mobi”. This is my hint that the visitor is browsing my site from a mobile device.

Here’s a simple JavaScript code snippet that demonstrates how I use the User-Agent to detect if a client is using a mobile browser:

In this code, I’m using the property ‘userAgentData.mobile’, which returns a boolean value. If the visitor is using a mobile device, it returns ‘true’, allowing me to know that they’re browsing from a mobile device. With this knowledge, I can then adjust the layout, functionality, or content of my website to offer a more tailored, mobile-friendly experience.

Keep in mind that while this method is generally reliable, there are always exceptions, as some browsers allow users to alter their user-agent strings. Therefore, it’s always a good idea to use additional methods or checks to ensure a truly responsive design for all devices and browser types.

Certainly, I’m happy to delve into the subject further.

Method 2: Using navigator.userAgent

Another method I utilize to identify mobile browsers relies on the same principle as the previous approach but uses a different property – navigator.userAgent. Mobile browsers, in general, have distinct user agent strings compared to desktop browsers. I can exploit this uniqueness to pinpoint if the visitor is browsing from a mobile device.

However, a word of caution here: some mobile browsers impersonate or ‘spoof’ their user agent strings to appear like conventional desktop browsers. They adopt this tactic to enhance compatibility with websites that aren’t designed with mobile browsers in mind. It’s a clever trick, but it can also make accurate detection a bit more challenging.

Interested in seeing the user agent string for yourself? It’s simple. Open your browser’s JavaScript console and type in ‘navigator.userAgent’. This command will display the string that your browser is currently sending to servers.

Here’s what you might see if you’re using a mobile browser:

The string might appear complicated at first glance, but it contains a lot of useful information, such as the browser type (in this case, Safari), the operating system (iPhone OS 9.1), and more.

So, how do I use this information to determine if the user is on a mobile device? It’s all in the ‘navigator.userAgent’ property, which returns the user agent string that the browser sends to the server.

Just as in the previous method, I look for specific terms in the user agent string. Typically, for a mobile or tablet browser, the string will contain the word “Mobile” or “Tablet”. This clue can help me determine the type of device the user is using.

Here’s a sample JavaScript code snippet that demonstrates this detection method:

In this code, I’m checking if the user agent string contains either “Mobile” or “Tablet”. If it does, I can safely assume the user is browsing from a mobile device or a tablet, and adjust my website’s layout or functionality accordingly.

Keep in mind, however, that user agent strings can be spoofed, and they might not always provide the most accurate or reliable information about the user’s device. Therefore, it’s beneficial to have a responsive design approach that can adapt to a range of device types and screen sizes, in addition to using these detection methods.

Of course, here is the article written from a first-person perspective, with further details and description.

Method 3: Using the Screen Resolution

The third method I often use for detecting a mobile browser involves examining the screen resolution. Given that mobile devices generally have a smaller screen resolution compared to desktop computers, this gives me another tool in my arsenal to distinguish between the two.

Here’s a piece of JavaScript code that I might use:

In this script, I’m checking whether the screen resolution is equal to or less than 1280×720 pixels. If this condition is met, I redirect the user to a mobile-specific page – in this case, ‘mobile.html’. Alternatively, I might adjust this threshold to 800×600 pixels, depending on the user base I’m targeting.

However, it’s essential to note that this method doesn’t come without its limitations. For instance, many modern smartphones, like the Samsung Galaxy S22, feature high screen resolutions – 1080 x 2340 in this case. The Samsung Galaxy Z Fold4 goes even further, boasting a resolution of 1812 x 2176. This high resolution might lead my code to mistakenly categorize these devices as non-mobile, leading to a less than ideal browsing experience for users of these devices.

An alternative approach I might employ involves looking at the viewport’s width. The viewport, essentially the visible area of a webpage on a device’s screen, usually measures less than 768px wide on most mobile devices. So, if the viewport width is less than 768px, I can reasonably assume that the user is likely on a mobile device. Here’s how I might implement this in JavaScript:

While none of these methods are foolproof, using them in combination and with a keen awareness of their limitations can help me tailor my website’s content and design to create a more enjoyable browsing experience, regardless of the device type.

In this article, we have seen how to detect a mobile browser or if its a mobile phone using JavaScript. Use the method that best applies to your application and usecase.

And there we have it! We’ve dived deep into the process of detecting mobile browsers in JavaScript. Throughout this journey, I’ve come to appreciate how invaluable this knowledge is, particularly in today’s mobile-centric world. With these insights, you’re now well-equipped to build more adaptable, responsive, and user-friendly web applications. Keep experimenting, keep fine-tuning, and remember – the power to shape the mobile browsing experience is now in your hands!

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  • X (Twitter)

Satvik is a passionate developer turned Entrepreneur. He is fascinated by JavaScript, Operating System, Deep Learning, AR/VR. He has published several research papers and applied for patents in the field as well. Satvik is a speaker in conferences, meetups talking about Artificial Intelligence, JavaScript and related subjects. His goal is to solve complex problems that people face with automation.

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How to detect browser in JavaScript [Chrome, Firefox, Safari, Opera, Edge , MS IE]?

JavaScript detect browser name: Here in this article we learn how to detect browser in javascript. I had a requirement where based on browser I have to display something different. In short, I have to detect firefox browser in javascript and display the respective message to the user. Same if the user browser is chrome, then display respective message. 

Basically we write code in JavaScript to check user browser. Which help answer to our question .i.e How do I know if I am using IE or Chrome in JavaScript?

Here we are detecting 5 major browsers and that are  Chrome ,  Firefox ,  Safari ,  Opera ,  MS Edge . And we are showing 2 different approach to detect browser at client-side i.e using userAgent.match and userAgent.indexOf with live demo example. Although based on different browser display different content is not good practise.

Steps to detect browser name in JavaScript

  • HTML markup to display browser name.
  • JavaScript code to detect browser using useragent.match
  • JavaScript code to detect browser using useragent. indexOf

HTML markup to display browser name

First, we create a new index.html page and add the below markup. Here we add an h1 tag, which will display the browser name on page-load.

Approach 1: JavaScript code to detect browser name using userAgent.match

To detect user browser information we use the navigator.userAgent property. And then we match with the browser name to identify the user browser.

JS code to identify browser is as written below:

Now call this JS function on page load, and this will display the user browser name on page load.

Approach 2: JavaScript code to detect browser using userAgent.IndexOf

Here in the 2nd approach we again using navigator.userAgent with indexof to figure out the browser name.

JS code as written below:

With the above code will be able to detect chrome browser, also with approach 2, we are able to detect MS Edge browser chromium based. By checking  trident  we were able to detect MS Internet Explorer browser IE in javascript.

Conclusion: Hereby using the  navigator.userAgent  we were successfully able to detect Chrome, Firefox, Edge, Safari, and Opera browser in Javascript. Add display the browser name on page load. It's in pure javascript, as we didn't use any external JS library for the browser detection.  

Thank you for reading, pls keep visiting this blog and share this in your network. Also, I would love to hear your opinions down in the comments.

PS: If you found this content valuable and want to thank me? 👳 Buy Me a Coffee

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@AdamMediacube

AdamMediacube commented Oct 29, 2021

isSafariBrowser = () => navigator.userAgent.indexOf('Safari') > -1 && navigator.userAgent.indexOf('Chrome') <= -1

Sorry, something went wrong.

@michancio

michancio commented Oct 29, 2021

Thanks for better and modern version. This repo is very old ;)

How to detect Chrome and Safari browser with JavaScript?

  • Post author By John Au-Yeung
  • Post date July 23, 2022
  • No Comments on How to detect Chrome and Safari browser with JavaScript?

Labrador retriever puppy walking on green grass

Sometimes, we want to detect Chrome and Safari browser with JavaScript.

In this article, we’ll look at how to detect Chrome and Safari browser with JavaScript.

To detect Chrome and Safari browser with JavaScript, we use the user agent and vendor strings.

For instance, we write

to check for Chrome with /Chrome/.test(navigator.userAgent) && /Google Inc/.test(navigator.vendor) .

And we check for Safari with /Safari/.test(navigator.userAgent) && /Apple Computer/.test(navigator.vendor) .

userAgent is the user agent string.

And vendor is the vendor string.

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How to Detect Browser Version in JavaScript

  • JavaScript Howtos
  • How to Detect Browser Version in …

Use the userAgent to Detect Browser Version in JavaScript

Why browser version detection should be avoided in javascript, another option to detect browser version in javascript.

How to Detect Browser Version in JavaScript

There are many devices in today’s world with various screen sizes.

But the problem is that not all the devices can support various features implemented on the website.

To detect the browser version and browser name, we can use the userAgent in JavaScript.

The navigator is the property of the window object.

To access the userAgent , you can use navigator.userAgent or use object destructuring to get the userAgent from the navigator.

Using the includes method will take a string as a parameter to return it. This string helps in detecting the browser as follows.

Detect Browser Version using JavaScript

The browser version and its name are present at the end of the string provided by the userAgent .

You can run the code below if you want to get the end part, i.e., the browser version and name and not the entire string.

All browser displays the same output. It is because all are built on chromium.

It’s not a good idea to detect the browser name and its version using userAgent because it’s not 100% accurate.

Every browser sets this data differently, and all browsers do not follow a particular standard.

Feature detection in a browser-

It can be a better idea to detect whether a particular browser supports a particular feature or not. And based on whether it supports a feature or not, you can take further action and write your code accordingly.

Progressively developing a website-

Following a design technique, you develop a website for smaller devices first with fewer features and move your way up to the top while increasing the features. It is known as a bottom-up approach.

Building for modern browsers-

Develop a full-fledged website with all the features for modern browsers and then tweak some changes so that it is supported on older browsers. It can be difficult to implement and less effective than the progressive or bottom-up approach.

Sahil Bhosale avatar

Sahil is a full-stack developer who loves to build software. He likes to share his knowledge by writing technical articles and helping clients by working with them as freelance software engineer and technical writer on Upwork.

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Detect location and local time zone of users in JavaScript

js detect safari

Detecting the location of your users can be really useful if you want to personalize your their experience when they browse through your site. Want to show a uniquely tailored promotion? Want to change the language of your site or design based on where your users are visiting from?

These are some common use cases for detecting user location. It can also be to limit access to your website to remain compliant or if you simply do not yet serve certain locations. We will explore the various ways we can get your users’ location as well as their time zone (especially if you intend to send them emails or generate a lot of reports for them).

Options for detecting user location with JavaScript

There are two very popular ways to detect a user’s location in the browser directly:

  • Using the Geolocation API

Looking up user IP address

Geolocation api.

The Geolocation API allows you to ask the user to share their present location. You can argue that it is the most trusted method for detecting location, as the user will tell you themselves.

However, in a scenario where you want to format the content displayed to the user before it gets rendered, this isn’t exactly ideal. In addition, the Geolocation API may not work depending on the user’s browser permission settings.

To use the Geolocation API, you can do the following:

It first checks that the browser has/supports the Geolocation API. If it does, it executes the rest of the code, which includes a success and error callback function. The navigator.geolocation.getCurrentPosition(success, error) gives you the user’s exact coordinates, which you can put into Google Maps to get the exact user location.

You can send a request to Google’s reverse Geocoding API . It would require getting an API key:

The downside of using this method is that if the user does not allow you to get their location, you cannot detect their position accurately — or you may not even detect it at all. Also, it only works on secure servers (HTTPS). It is not supported on Internet Explorer ≤10 and OperaMini.

This is by far the most common way of detecting user location. Unlike the Geolocation API, it can only give you limited information like Country and maybe City , depending on the IP lookup provider you are using.

Here is a simple lookup:

This works by making a request to the https://extreme-ip-lookup.com/json/ URL from the user’s browser so that their location is detected. This resource provides country, city, time zone, longitude, and latitude, among other things.

With a single query, you can tell which country a user is in and get their time zone. How convenient.

Many times, the information provided by IP lookup might be all you need. In that case, there would be no need to get the exact coordinates to pinpoint the user’s location in their city.

Here is a list of other places to check out when performing IP lookup:

  • http://ip-api.com/json
  • https://ipinfo.io/
  • https://geoip-db.com
N.B. , understand that IP lookup mostly gives you accurate information about country and time zone of the originating request. The city may be the location of the ISP. If you intend to get the user’s exact city or region, you should use the Geolocation API and find ways to convince the user to share their location with you.

Getting local time zone of users in JavaScript

It is tempting to conclude that this is the easy part. Well, you could easily create a Date object, send it to your server, and store that time. This comes with a lot of challenges, however, because you have to worry about doing internal calculations and not having them go off. This is why it is more important to fetch the user time zone above everything else.

As you saw above, we can detect time zone from IP address lookup. All you have to do is pick out the time zone from the response object along with the user location. Below, we will explore other ways of detecting time zone.

js detect safari

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Moment.js time zone function

Moment.js includes a function that guesses the time zone of a user . It is quite accurate, provided you are using the most recent version.

Below is a quick example of how it works:

When you load the page, it shows you your current time zone. Create a index.html file and open the file in a browser. Copy the above code into the file and save it. Then refresh the browser tab you just opened. Cool right?

MomentTz uses the built-in JavaScript Intl object . It also has its data bank it checks the result of the Intl object against to provide more accurate information. It also requires you to have included Moment.js before it can work.

Jstz package

Jstz is a simple lighter package for detecting time zone. I say lighter in comparison with Moment.js. It also makes use of the Intl API, so you can be confident of its results. To use the package, you can grab the CDN as follows:

What you may notice from these libraries used for detecting time zone is that they do not require any network calls from your end. This means that if you intend only to pick user time zones, you may not need to do IP lookups — and that’s good because you’re paying for every call to the API, which can get expensive.

The Internationalization API ( Intl ) itself

Don’t hate me, but let’s face it — if I showed you this, you may have ignored the rest of this article lol.

OK, so here is how to use it:

Before you go “Wow!!!” understand that the packages highlighted above take a lot into consideration when detecting time zones. This makes them slightly more accurate than Intl object alone. You may never notice the difference, but it feels good knowing someone’s got your back.

Building a JavaScript app for detecting user location and time zone

“Talk is cheap. Show me the code!” — or so the saying goes. Let’s do one better and build a really simple app that detects a user’s location and time zone information, and tell them what the time would be like in three other time zones around the world.

Here is what the simple application looks like:

js detect safari

Here is how we pieced the code together to achieve that. Place the following code in a file named index.html :

index.css file and add the following:

This may be the most simple application you have ever seen. We’re not doing anything fancy, just going straight to the point. Standard HTML and CSS — that’s all.

Now, let’s add the JavaScript that brings all of these to life: add the following to index.html :

We have laid the foundation for what is to come. The first thing we want to do is detect whether the user’s browser supports the Geolocation API:

Now, we get to execute our code if the Geolocation API is available/accessible. If it is not, we just fall back to IP lookup, like we saw above.

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Let’s create the success , error , and ipLookup methods:

We have already seen how these work above, so I’m going to skip explaining each. Let’s add the reverseGeocodingWithGoogle method now:

You may have noticed that I introduced two new functions, processUserData and fallbackProcess . These are just to keep things clean and reusable. Let’s now add the both of them:

You see the methods just perform assignments — nothing too complex. For the address variable, I should ordinarily define it in the global scope, but I brought it into the function so you would not miss it. Do note that this is not the best way to reuse code.

Now, let’s detect time zone:

And that completes our magic app. You can check out the working app on Codepen below:

See the Pen Detect Timezone and Location in JavaScript by Chris Nwamba ( @codebeast ) on CodePen .

I hope this article has been useful to you. I hope it helps you improve your user experience and to build a more internationalized application with JavaScript.

One last thing that can come in handy would be to get a DateTime string in a particular time zone using JavaScript. Not to worry, I got you. Here is the simple line of code you need:

Share your experiences using these tools, let’s all learn together.

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5 Replies to "Detect location and local time zone of users in JavaScript"

thank you for the post! Just realised that you mixed up longitude and latitude in the reverseGeocodingWithGoogle function 😉

I am glad that i found you. I think u don’t mind if i use ur code?

Thanks for sharing useful code/script to locate any IP address by using this step.

Interesting post! I have one query related to DST. Is there any way in Javascript which will give us user’s tzid and tz long name based on tz database used in Joda library? These tzids are widely used universally and are defined by IANA database. Java’s Joda Library also use the same tz database.

Joda library gives different DST data (not shown below) for same offset i.e. +04:00…like as below:

(+04:00) Europe/Ulyanovsk, Greenwich Mean Time (+04:00) Europe/Volgograd, Moscow Standard Time (+04:00) Indian/Mahe, Seychelles Time (+04:00) Indian/Mauritius, Mauritius Time (+04:00) Indian/Reunion, Reunion Time

we have to apply those DST rules while sending icalendar file (ICS files) to users. Users are located at different regions.

if user’s timezone detected by JS is “+04:00 with some country”, then how can we decide which DST rule out of several should be applied? Because I dont have any country to region mapping.

i didn’t see the place am in?

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    How to detect Safari browser using JavaScript? I have tried code below and it detects not only Safari but also Chrome browser. function IsSafari () { var is_safari = navigator.userAgent.toLowerCase ().indexOf ('safari/') > -1; return is_safari; } javascript browser-detection Share Improve this question Follow edited Dec 10, 2013 at 21:12 Kara

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    Here's how you can detect Safari browser in JavaScript: javascript var isSafari = /^ ( (?!chrome|android).)*safari/i.test(navigator.userAgent); Let's break down the code: 1. We start by creating a regular expression ( /^ ( (?!chrome|android).)*safari/i) that checks if the user agent string contains the word "safari" but not "chrome" or "android".

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  8. How to Detect Mobile Browser in JavaScript

    Method 2: Using navigator.userAgent. Another method I utilize to identify mobile browsers relies on the same principle as the previous approach but uses a different property - navigator.userAgent. Mobile browsers, in general, have distinct user agent strings compared to desktop browsers.

  9. javascript

    1 Answer Sorted by: 0 I strongly recommend this JS Library: https://github.com/bestiejs/platform.js/ It's returns an object:

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  12. Browser detect safari or Chrome · GitHub

    browser_detect.js var is_chrome = navigator.userAgent.indexOf('Chrome') > -1; var is_safari = navigator.userAgent.indexOf("Safari") > -1; function isSafariBrowser(){ if (is_safari){ if (is_chrome) // Chrome seems to have both Chrome and Safari userAgents return false; else return true; } return false; } Sign up for free

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  17. Detect location and local time zone of users in JavaScript

    Moment.js includes a function that guesses the time zone of a user. It is quite accurate, provided you are using the most recent version. When you load the page, it shows you your current time zone. Create a index.html file and open the file in a browser. Copy the above code into the file and save it.

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    To detect the user's timezone we need to: Get the user's timezone offset (javascript) Detect if daylight saving time (DST) is in effect at the moment (javascript) Submit these information to the server, and find the appropriate php timezone identifier based on them (php). Our javascript function (inspired by this article) is the following ...

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    71 1 11 What "compatibility issues"? You'd be better testing for this instead. - Kaiido Apr 17, 2018 at 8:51 Oh that is beyond me. To scripts dont work together due to the way that safari pre calculates the background size preload (I think). will gladly pay if anyway can fix this. - thank_K Apr 17, 2018 at 9:32

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