Which cross platform framework to use for HTML5 application?

Question

JavaScript

Good afternoon!
There is an HTML5 application that now opens in the browser and does some stuff.
But it needs a little more back-end for it to do something right.
And in the end, this application with a back-end needs to be wrapped in one (at least relatively) cross-platform application, the essence of which is something like this
: in the desired form and then gives to the front.
2. Launches a browser in full screen (on android - preferably not just webview, but chrome) with HTML5 support in all its glory (video, audio, javascript, localstorage)
And so that it all works on desktop, tablets and mobile phones.
And here you need to choose some kind of framework. About such frameworks, I only know that they seem to exist and nothing more.
Googled about the following solutions, but suddenly something is wrong or there are better options:
1. Atom Electron is only a desktop.
2. React Native, as I understand it, is already able to run on both desktops and mobile devices? But what about HTML5 support in WebView?
3. Kivy. I know that in Python and can do all platforms. And that's it.
4. PhoneGAP / Cordova - only mobile and they say that they are slow.
5. Intel XDK?

Answer 1

p.4, PhoneGap.
This is an absolutely working solution.
And if you fasten another WebView cross-walk, then it will be even faster.
Here is a list of what may be required.