Dynamic import expressions are a new feature in ECMAScript that allows you to asynchronously request a module at any arbitrary point in your program. What this means in short that you can conditionally and lazily import other modules and libraries to make your application more efficient and resource-conscious.
The problem: when you have an element with some :focus styles, they're applied not only to the focused state itself but also after you just click on this element (and it behaves differently for different elements in different browsers, of course).
The name isn’t for you and worrying about it is distraction from just building things that work better for everyone. The name is for your boss, for your investor, for your marketeer. It’s a way for you to keep making things on the open web, even those things that look really “app-y” and your company wants to actually make as a native app, 3 times over. They don’t want you to make websites anymore, but you still can if you’re sneaky, if you tell them it’s what they think they want.
A lot has been written about React and Angular in the last few years. Finding a comparison between the two most popular ways to write a modern web application is not hard at all, but comparisons are mostly without statistics and a proper methodology to show the difference between the two.