JQuery 4

[fasfas]

Are you able to say anything about compatibility with jquery 4, just released, especially its reliance on more modern browser techniques where these are now supported in all mainstream browsers? Is there anything you know not to work?

[Moonchild]

Without knowing what jquery is using, we can't say.

[jobbautista9]

The 4.0 series is still officially compatible with IE 11 which was released in 2013 (that's why they were able to make a 4.0 release this year, they just delayed the deprecation of IE compatibility to 5.0), so I doubt jQuery 4 is going to be much of a problem.

[UCyborg]

Support latest few Chrome and Firefox versions. Also support IE11. No mention of Pale Moon. Make it make sense. Why not rather declare compatibility with specific ECMAScript spec instead?

Edit: To be fair, having to check things on arbitrary version of any browser does sound insane.

[Moonchild]

Support latest few Chrome and Firefox versions. Also support IE11. No mention of Pale Moon. Make it make sense.

JQuery is what started off this whole premise of "supporting current and current -1 of mainstream browsers and if you use anything else you're out of luck bye". So I'm not surprised they haven't changed.
Basically it's making and publishing a general purpose library and not wanting to have to care about compatibility and claiming the freedom to use whatever latest sugar is in the latest draft specs without consequence. I call that irresponsible, but who cares.