Stencil is a compiler that generates Web Components (more specifically, Custom Elements). Stencil combines the best concepts of the most popular frameworks into a simple build-time tool.

Stencil takes features such as

Virtual DOM
Async rendering (inspired by React Fiber)
Reactive data-binding
TypeScript
JSX

and then generates standards-based Web Components with these features baked in.

Ace = JavaScript + Native UI + iOS + Android
for Apache Cordova

Add native power to your shared JavaScript codebase
Works with Ionic, PhoneGap, and all Cordova-based projects