NativeScript VS Polymer

This is not so much the Svelte equivalent of React Native as it is just NativeScript (https://nativescript.org).

There is also https://nativescript.org/ which would allow you to use Vue (or several other frameworks) to build a mobile app. Used it myself a while back for an iPad app using Vue 2 and it was pretty straightforward. It seems like there have been quite a few improvements since then so might be worth a look.

Anyone who thinks this sucks should try NativeScript with hassle-free update experience, quick build time, HMR, direct access to native apis, use React Native plugins and more. Pick any style you like - vanilla, Angular, Vue, React, Svelte - and easily add some SwiftUI and Jetpack Compose views if you want a and connect it to your JS. Docs are a bit behind at the moment but a major update is in progress. https://nativescript.org/

There are layers that offer access to native APIs like capacitor, cordova and nativescript. Apparently sometimes multiple of them should be used, but I didn't understand what are the differences even after reading the announcement. These seem to be frontend agnostic technologies and Capacitor is apparently the more modern choice at the moment.

Maintaining NativeScript core is like maintaining any TypeScript library. In particular, it's maintenance revolves largely around:

PWA? You can then, with moderate difficulty use something like https://nativescript.org/ make native versions.

Using the amazing Preview environment that the Nativescript team together with Stackblitz have done, it was time to start hacking at it. (More information can be found here at https://preview.nativescript.org/)

8. NativeScript + PWA [hybrid]

There is something called NativeScript

Oh, and I know that Wappalyzer detects that Youtube uses Polymer, but here's the thing if you go to the Polymer docs it clearly says "The Polymer library is in maintenance mode. For new development, we recommend Lit."

Polymer - DEAD Recently

It is an open-source JavaScript library based upon Web Components. It is developed by Google. Polymer helps us to create custom elements for building web applications. It's much easier and faster to create custom elements that work like DOM elements.

At least for the YouTube example, if memory serves, they often use Polymer web components for page templating and layout. When you style components through these, oftentimes the CSS styling ends up inline on the page the components are included in.