"Teens these days"
Other developers mock other developers who use bunch of libraries and frameworks, especially the new developers who are diving into web development.
It's more like CLRS vs right into Node development.
What can you say about it?
Learn about the core, before you use the libraries/wrappers :-)
All the new web developers are concentrating much on Javascript. They have to spend time writing semantic html and good css. With all these they can become a good frontend developer. But they are going towards trendy frameworks and libraries like React, Angular, vue.
I too did the same initially, now am concentrating equally.
I'm going to let you in on a little secret us crabby older developers rarely mention. MOST of our dislike for all of the new nonsense stems from one simple thing.
Watching people make the same mistakes you did decades ago.
It's hard to admit, but we all start somewhere -- but it's annoying as hell to see the same crappy outmoded outdated practices being slopped into new fangled broken techniques before the beginner even has enough of the basics under their belt to even know if a framework or library is any good!
The end result always comes across as a mish-mash of idiocy; the same mish-mash we've seen time and time again. 20 years ago it was called HTML 3.2 and HTML 4 Transitional. The same presentational mindset today gets crapped into HTML 5 as if the improvements and simplicity of 4 Strict never existed, resulting in the same halfwit garbage that used to do nonsense like align="center" width="45%" now just crapping out class="textCenter x-m-2". Instead of presentational attributes, you get presentational classes. Total improvement? NONE! Missing the point of HTML? ENTIRELY!
It's even MORE annoying when people who should know better just flat out spend a decade or more IGNORING being told to stop doing things. Splash screens that offer nothing of value? Back with a vengeance. Stupid distracting animations one generation removed from GIF files? Load up on the scripttardery for that.
Even on the server side that SO many tutorials are still around teaching mysql_ even though WE WERE TOLD FOR A DECADE TO STOP USING IT... A whole DECADE. For close to six years there were GIANT RED WARNING BOXES in the huffing online manual saying "switch to PDO or mysqli" -- and it wasn't until 5.6 started throwing warnings and 7 flat out shoved it down everyone's throat that anyone ****ing listened.
... and even then you have mouth-breathing halfwits TEACHING others to still slop variables into their query strings like this was still 2007.
But no, the majority of developers put their heads in the sand, refused to learn it, and only embraced it "when they had to" instead of planning ahead.
But again, look at the scripttards -- the people who use JavaScript to do HTML or CSS' job or things that have zero damned business on a website in the first place. Stuff we've been told for DECADES not to do. Stuff that's blatant accessibility violations where if you pull it on the wrong types of sites, you could land in court... and stuff that EVERY single beginner dives for going "ooh shiny" -- more often than not ending up with intermediate developers who should know better knowing nothing more than "ooh shiny" then wondering why they're being sued for breach of contract after dealing with a bank, utility, healthcare, or government agency.
BUT, that's not entirely something you can lay at the feet of new developers. The problem is the sheer volume of outdated web-rot being promoted as good sources (see W3Fools for a stunning example of such ineptitude and ignorance), being told to "just use jQuery" before they know enough HTML, CSS, or JavaScript to realize how badly they are being saddled up... and so forth. Or outright asshat ignorant bullshit like bootcrap being endlessly and mindlessly touted as magically having been somehow 'easier' or 'makes you more productive' or 'allows you to work better with others' when it does none of those things; as evidenced by the poor sod duped into using it using writing two to three times the amount of code as they would need if they bothered learning to use HTML and CSS properly first.
There's a reason I have ZERO respect for any developer who thinks bootstrap lives up to any of the claims. It's a bloated mess of presentational classes defeating the entire reason HTML and CSS are separate in the first place, whilst flipping a double-bird at accessibility. The only way you could believe the LIES about how great bootcrap is must be the simple fact you probably don't know enough about HTML or CSS to even flap your gums on the topic!
That's NOT the fault of the beginner. The problem is the people in the middle -- the one's who've learned just enough to be dangerous, and not enough to realize how badly their advice is screwing everybody else! It's not the beginners fault -- they're ignorant. That's NOT an insult. Ignorant just means you don't know. It's the dipsticks giving the beginners bad advice who need the verbal tongue lashing as by that point they should know better.
... and sadly when it comes to topics like web development, it seems the majority of developers -- old, middling, and greenhorns alike -- refuse to extract their cranium from 1997's rectum!
As a dearly departed friend of mine used to say:
That doesn't get laid on the beginners lap, it goes to all the crappy outdated tutorials that should have been deleted a decade or more ago, the mindless parroting of how "great" and "easier" systems that make MORE WORK are, and a general lack of starting with the basics -- like client-side semantics, separation of presentation from content, graceful degradation, and accessibility norms... or server-side separation of concerns, the dangers of scope bleed in interpreted scripting languages, sanitation and distrust of client side data, etc, etc, etc...
Don't even get me STARTED about the PSD-jockey scam artists who call themselves "designers" when they know exactly two things about design; and Jack left town!