Flutter emerged a bit later (first teased in 2015, released around 2017) from Google’s labs. It came with its own engine, ...

Facebook found that initial principles of React Native—serving as a single asynchronous, serializable, and batched bridge between JavaScript and native apps—made it harder to build features.

Microsoft: Learn JavaScript programming language for free with our new course Programmers keen on building browser applications can take advantage of Microsoft's free JavaScript video course.