How realistic is development on js for mobile platforms now and in the medium term?

Question

JavaScript

I made an application using ionic - performance suffers greatly (on cheap phones), although the most resource-intensive there was an endless scroll for 500 list items.
There are such things as famous, react native and they say that the performance will be like in native development. Win8 (10) suggests replacing c++ programmers with js programmers.
And after all, I myself want to thoroughly study one language (js), and the technologies that are built on the basis of it.
But there are project ideas that must be implemented, including on mobile platforms.
To hope or not to hope? The medium term is a year and a half.

Answer 1

So far, not at all.

Answer 2

It all depends on the complexity of the application. But in general, the situation does not change much - optimize, do not optimize, native code will run faster than several abstract wrappers and virtual machines. Another thing is that you also need to be able to write native code. You can write it in such a way that JS will work faster :)

Answer 3

Maybe I'll say something stupid, but have you looked at PhoneGap? There just 90% - JS.
Performance, however, is noticeably lower than natives, but if you sit on optimization, you can achieve a lot.

Answer 4

Perhaps native js support will be added to mobile devices - then yes!
But you can prepare for this in advance))