A resource I commonly turn to when I’m feeling impatient is Learn X in Y Minutes: https://learnxinyminutes.com/
If you're actually serious about learning to program, then it's going to take more than a few minutes of your life to learn.
But if you can't stomach investing more than a few minutes in learning to program in JavaScript or any other programming language, then you should really find something else do to with your extremely limited time.
Teach Yourself Programming in Ten Years, by Peter Norvig:
https://norvig.com/21-days.html
The last time I posted a link to this important essay, impatient people who weren't very serious about investing any time in learning or reading simply and immediately responded to the title, but didn't bother to actually follow the link or read and respond to any of Peter Norvig's brilliant essay (and probably didn't even know who he was), so here is an excerpt.
>Researchers (Bloom (1985), Bryan & Harter (1899), Hayes (1989), Simmon & Chase (1973)) have shown it takes about ten years to develop expertise in any of a wide variety of areas, including chess playing, music composition, telegraph operation, painting, piano playing, swimming, tennis, and research in neuropsychology and topology. The key is deliberative practice: not just doing it again and again, but challenging yourself with a task that is just beyond your current ability, trying it, analyzing your performance while and after doing it, and correcting any mistakes. Then repeat. And repeat again. There appear to be no real shortcuts: even Mozart, who was a musical prodigy at age 4, took 13 more years before he began to produce world-class music. In another genre, the Beatles seemed to burst onto the scene with a string of #1 hits and an appearance on the Ed Sullivan show in 1964. But they had been playing small clubs in Liverpool and Hamburg since 1957, and while they had mass appeal early on, their first great critical success, Sgt. Peppers, was released in 1967.
This essay is a classic that's been discussed on HN numerous times:
https://news.ycombinator.com/item?id=27411276
https://news.ycombinator.com/item?id=20543495
https://news.ycombinator.com/item?id=16574248
The website OP mentions is for someone who already knows how to program well in one or more language and want to take a quick look at another language syntax.
Then they think they can learn programming languages by reading Twitter instead of writing code, and claim on their resumes they know languages they've only read a few blog posts about.
Those are the same people who complain that they hate Lisp by parroting tweets that it has "too many parenthesis", even though other languages have much more complex syntax, much less powerful and more limited and difficult to use macros and meta-programming facilities (like C macros and C++ templates), that force you to use an ugly mish-mash of even more inconsistent punctuation line noise like brackets, braces, escapes, quotes, backquotes, obscure operator precedence and ad-hoc parsing rules, and a myriad of other hard-to-learn punctuation that makes the code much less readable than Lisp, without realizing that there is actually a point to Lisp's clean simple parenthetical syntax.
There's also a long sad history of impatient people not wanting to bother learning JavaScript, but believing that they can simply learn JQuery or React or some other popular "silver bullet" library instead:
Can you get away with learning jQuery only instead of JavaScript?
https://www.quora.com/Can-you-get-away-with-learning-jQuery-...
Should I learn jQuery first or Javascript?
https://www.quora.com/Should-I-learn-jQuery-first-or-Javascr...
Is it necessary to learn JavaScript before learning jQuery? [duplicate]
https://stackoverflow.com/questions/3183545/is-it-necessary-...
Why You Should Learn jQuery Before JavaScript
https://learn.onemonth.com/why-you-should-learn-jquery-befor...
Why Beginners Should not Learn JavaScript through jQuery
https://www.codementor.io/javascript/tutorial/learn-jquery-j...
Do I need to know JavaScript in order to learn jQuery?
https://www.quora.com/Do-I-need-to-know-JavaScript-in-order-...
How is it possible to learn jQuery without first knowing JavaScript?
https://www.quora.com/How-is-it-possible-to-learn-jQuery-wit...
Can I learn React.js if I don’t know JavaScript?
https://oprearocks.medium.com/can-i-learn-react-js-if-i-dont...
Do we need to fully know JavaScript to study React?
https://www.quora.com/Do-we-need-to-fully-know-JavaScript-to...