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Rather than checking version numbers or build IDs, the ideal way for a polyfill to determine available JavaScript features would be to write some test code that tries to use the features in question. But I'm not sure how practical that is. If you try to use, say, nullish coalescing and the browser doesn't support it, you get a syntax error. I don't think you can try ... catch a syntax error, so results of any test code are likely quite unpredictable. So it may not be easy, or even possible, to do things the ideal way, and polyfill authors may be stuck checking version numbers or build IDs.

Update notification! Both versions of my Root Certificate and Revoked Certificate Updater have been updated and are now of 05/24/2022. You can find them in section Downloads -> Latest Downloads -> Downloads related to Root Certificate Updates in the first post of this thread. Cheers, AstroSkipper

Since FthrJACK hasn't put it in the guides section yet, here is a guide on how to install Solitaire, Freecell, Spider Solitaire, Hearts, Pinball, the Internet Games, and Minesweeper on Windows Server 2003: -- For all of you out there who want to know how to install games like Solitaire and Minesweeper on Windows Server 2003, here’s how to do it: What we need: The attached .zip file (PM me for the file, I have a bandwidth limit! ) Windows Server 2003 CD Windows XP Professional CD Before we do this, copy all the .inf files from the .zip file to your INF directory. For me, it is the C:\WINDOWS\inf directory. Then copy the .dll files from the .zip file to the setup directory. For me, it is the C:\WINDOWS\system32\Setup directory. Now we’re all setup. Next, what we need to do is pop-up the Add/Remove Windows Components dialog (if you don’t know how to do this, go to My Computer and click on Add/Remove Programs on the left hand menu and then click on Add/Remove Windows Components). Now, double-click on Accessories, then double-click on Games and uncheck the ones you don’t want. Now press OK>OK>Next >. It will now ask you to insert your Windows Server 2003 CD…Put in the path that refers to your I386 folder. My directory was D:\I386. Press OK. Now it will ask you for another CD which will be called (Unknown). Put in your Windows XP Pro. CD and put in the path that refers to its I386 folder. Mine was D:\I386. It should continue to setup and the games should appear under your Start Menu under Programs. Note: I have only tested this method under the Enterprise Edition and works fine…I am not responsible for what may happen to your computer if anything goes wrong! Good luck! (And everyone thought you couldn't play games on a server, pfffff....)

changes should be pushed now

@Damnation I have no idea. When I have time in my next holidays in 5 weeks I make a try also with Ndis6 for to solve this loongstanding problem in XP. Really, with an working ndis6 for XP a lot of new motherboards will work to full with XP SP3 Dietmar

Seems to be possible indeed: https://stackoverflow.com/questions/23147087/how-to-detect-syntactical-features-of-javascript In general it seems useless but in this case this is the way to go. It would be the most practical thing indeed, I Just need too learn JavaScript at some point. However for the UXP platform there are very few builds anyway so a version based system should be fine.

you may check BuildID to see if certain feature is available or not. queueMicrotask: since 20220325000000 optchain: since 20220505000000 nullish coalescing: since 20220523000000 checking platform version from my builds can only distinguish if js-optchain and js nullish coalescing is really not available in platform code or not. (i.e. 4.8.4 or older don't have them, 4.8.5 may have them but depends on BuildID) since those features are not available before I bump versions: https://github.com/roytam1/UXP/commits/9816e341b29ac8f3eb5223a6528197e88b381e22

my tree is somewhat like 5.1.0 upstream, but not everything is the same as upstream. there are lots of upstream changes are not included in my tree.

SyntaxError: invalid regexp group So, use different browser I guess...

I tried on my 7 VM and it just gave a generic installation failure.

Can this thread be used for software that unexpectedly added Windows 7 support when it didn't have any before? Because that's exactly what the latest EA Desktop patch just did, didn't try it myself yet but it should be working on Windows 7 now. Completely unexpected but glad EA isn't locking out older PCs from playing their games. Source: https://trello.com/c/X6qTHmHA/391-updates-ea-app-version-1202165178

Do not forget that restricting vcache to 8MB will not allow all programs to work so if an error occurs that says that it is not working due to restrictions placed on this machine, it will be because of lack of available vcache. Maximum Cache size should be at least 32MB as 16MB is not enough from using that amount as done by accidental experience.