Ionic Framework is currently one of the most popular frameworks for hybrid mobile app development. This has resulted in a very large community of active users who contribute to the community by writing tutorials and answering questions.
Ionic is still a young framework (version 1.0 was released in May 2015). There are still some quirks and bugs in the framework to work out, which you can see a list of on their Github.
However Ionic is under active development and bugs are generally addressed quickly.
No need to wait for bridges to new API developed by someone else. The concept behind NativeScript enables instant access to even brand new API or OS versions.
Despite being such a young framework (early 2015), the support for React Native grew quickly. There is a forum, active tag on Stackoverflow and many other ways to get help from the community.
Whenever there's functionality you need that they don't use in their apps, it's not going to get developed by them, even if it's obvious it should be in the core. They always say to either submit a PR or create a separate module.
React Native is not the most beginner-friendly framework for creating mobile apps with JavaScript. It requires that the developer know React, which is known to have a steep learning curve.
Sencha provides exhaustive documentation that covers all aspects of developing with their products.
They also provide a well written getting started guide that's easy to follow.
Sencha Touch is targeted towards enterprise-level development, and the price tag reflects that.
There are many different product options available by Sencha. Most licenses start in the thousands of dollars, and require a minimum purchase of 5.
Tabris is very easy to use. You can just download Tabris Dev App from Play Store/AppStore and run any example from GitHub or code snippet from documentation right away using Playground. Documentation is easy-to-follow, and to start developing in your local environment you should only download lightweight CLI tool that will pull application code from your PC to mobile device using Wi-Fi.
Framework and all required tools are free. Playground and Dev App - free. Online build services -for free. For some time local build service was under a paywall, but now that feature is also free for everyone.
Tabris using native widgets - it makes your app run faster and look...native - regardless of platform. Stop trying to make your buttons look "like real iOS buttons" when you can just use the native ones.
Connect your PC and mobile device through Wi-Fi using Tabris CLI - and just hit the Refresh button in your application to see the latest code version in action. No emulators or attempts to run a mobile application in the browser.
Due to the support for Javascript, Typescript, and JavaScript XML, the documentation for any given part of the framework might only have snippets for a sub-language that you are not working in.
You can use Appcelerator Studio (Eclipse tool) or any other Editor (Atom, VSCode,...) with the CLI tools. There is even an Atom package supported by Axway.