Many answers here, and I'd like to add my input. IE 11 was being such an ass concerning flexbox see all its issues and inconsistencies here that I really needed an easy way to check if a user is using any IE browser up to and including 11 but excluding Edge, because Edge is actually pretty nice.
Based on the answers given here, I wrote a simple function returning a global boolean variable which you can then use down the line. It's very easy to check for IE. This way you only have to do the look up once, and you store the result in a variable, rather than having to fetch the result on each function call. As far as I know you don't even have to wait for document ready to execute this code as the user-agent is not related to the DOM.
I landed on this page in , and I see that till IE5 all userAgent string have Trident , I'm not sure if they have changed anything. So checking only for Trident in the userAgent worked for me. I've placed this code in the document ready function and it only triggers in internet explorer. Tested in Internet Explorer I happened to find this by accident when I was testing if my site worked on IE, and I went to the debugger and clicked the folder icon. It has my scripts, and also a Dynamic Scripts folder that I didn't have.
I opened it and found lots of browsertools. Inside them I found stuff like:. So I used these to test if the user's browser was IE. Just note this only works if you want to know if they have IE, not exactly what version of IE they have. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow.
Learn more. Check if user is using IE Ask Question. Asked 7 years, 11 months ago. Active 4 months ago. Viewed k times. I am calling a function like the one below by click on divs with a certain class. If I could tell which browser they are using that would be great but is not required.
Daniel Tonon 7, 3 3 gold badges 51 51 silver badges 54 54 bronze badges. By modern web development standards, it's bad practice to develop for old versions of IE to begin with.
Actually, this "bad practice" is forced by the standards themselves, so it's not the developer's fault Browsers work differently and and the specs are too soft on implementation issues. In order to make something that is not buggy and not boring as hell one has to do browser detection. I would suggest an other best practice: With modern web development, it's bad practice to support non-Chromium-based browsers with Safari not considered to be Chromium-based at all. Sorry, but this insanity must end at some point and somehow It is better practice today to do "feature detection" over "browser detection".
Ask whether the browser does what you need instead. ChrisRogers - That sounds great and all, but if you need to add some inline styles because of a bug in how IE measures the size of child elements of a flexbox element , then yeah Chris - apologies I'm going to blame IE for stealing my joy and leaving me with bitterness and frustration. Show 9 more comments. Active Oldest Votes. Here is a more straightforward approach, as ancient versions of IE should be gone. Mario Mario 7, 2 2 gold badges 13 13 silver badges 28 28 bronze badges.
Thank you for commenting. I have not verified your answer yet, but I want to comment one thing: As the first 'if' contains a 'return', you don't need an 'else' afterwards. Just curious, why the heck do they change the user agent line in new versions of IE? MS seriously don't want us to detect their awful web browser. SameerAlibhai Which sounds good in theory but in practice, especially currently, it's not practical.
Sometimes issues arise that a single "feature" detection doesn't encompass and plus certain features have implementation quirks that can only be worked around with knowledge of the browser. What if I want to do something simple like collect browser statistics?
Introduction Everyone arriving in Ireland must complete a Passenger Locator Form before boarding a flight or taking a boat to Ireland. You need the following details to complete the COVID passenger locator form: The mobile phone number that you will use when in Ireland Your email address Your place of residence when staying in Ireland Information on how you arrived in Ireland for example: name of airline or ferry, flight or ferry number Passport details of passengers You are also asked which of the following you are travelling with: Proof of vaccination Proof of recovery from COVID in the past days Proof of negative RT-PCR test taken within 72 hours before arrival OR a positive RT-PCR COVID test result at least 11 days before arrival and no more than days If you completed the form before 9 November and any information you provided on the form changes over the 28 days after you arrive in Ireland, you must email passengerlocatorform plf.
What does fully vaccinated mean? You are fully vaccinated when it is: 15 days after the second AstraZeneca dose or second Covishield dose 7 days after the second Pfizer-BioNtech dose 14 days after the second Moderna dose 14 days after the single Janssen dose 14 days after the second Sinopharm dose also called Vero Cell Inactivated Mixed vaccines If you got different types of vaccines for your first and second doses, you are fully vaccinated once the above period has passed based on your second vaccine.
What is valid proof of vaccination? You should bring proof that you have been fully vaccinated when you travel to Ireland. Your proof of vaccination must contain the following: Confirmation that you are fully vaccinated The date or dates you were vaccinated The name of body in the state implementing the vaccination programme that administered the vaccine to you. What other proof of recovery is acceptable? Your proof of recovery must contain the following: Your full name and date of birth The date of your first relevant positive test result The disease or variant from which you have recovered The country where the test was carried out Details of the body that issued the certificate Dates the certificate is valid from and expires you must have tested positive at least 11 days ago but no longer than days ago.
Do I need to quarantine? You do not have to quarantine when you arrive in Ireland. Page edited: 9 November This page has information what to do before you go and how to make sure you follow the rules where you are going.
Find out what the COVID test involves, who can be tested and what to do while you wait for your results. Look for the Edge version number on the right side of the screen. Another way to get to this screen is from the browser's settings. Search for version to quickly find Edge's full version number. Actively scan device characteristics for identification. Use precise geolocation data.
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