Do I need to learn JS/Dart to use frameworks?

Question

Frameworks

The question may seem ridiculous to some, but it’s useful to deal with the web and found that pure js is no longer there. Everyone writes everything in frameworks. And at first glance, they have little in common with pure js.
Same thing with Dart. The language seemed to me more understandable than JS, but again. We need the ability to quickly make something working and easily and without hemorrhoids to support it.
Hence the question. Does it make sense to learn a language or is it easier to start with frameworks?
What is the general situation? Are there universal frameworks or each for its own purposes? What is the difference between jQuery and Angular?
Also advise pliz frameworks for Dart.

Answer 1

I like learning new languages ​​and technologies .
Stop littering.

Answer 2

With knowledge of the framework, you will solve common issues and write sample code. No matter how you know the framework - it closes only a certain part of the tasks, even if it closes a lot of them.
You need to know the language.
Only in this way can you fully write something yourself.
And edit/append the framework.
Or write your own solution if necessary.
You won't get far without a language.
Those who write only in frameworks without knowledge of the language, give them a difficult task that is not related to the framework, they will not do it.
Knowing a language is more than just syntax.
For example, to know that in JS (as in other languages) the complexity of for depends on the steps and by doing not i++, i+=2 you will reduce the load (be careful with an odd number of elements) or that dynamically adding a field to an object - under the hood will recreate a hidden class in V8.
Or that Promises and their then => Promises are expected recursively and you can write nested constructs.