RE: What is new in IONIC 3?
What’s New in Ionic 3.0?
Compatibility with Angular 4.0.0
It comprises compatibility with Angular 4.0.0. The updated Ionic 3 has introduced many new features as well as smaller and faster applications. It also provides support for the latest TypeScript version and much more.
Compatibility with TypeScript 2.1 and 2.2
Just like compatibility with Angular, this new update has facilitated to work with the latest version of TypeScript. It allows faster the build time as well as type checking in your app. It also supports mix-in classes, the capability using async await in Ionic. There are many more other updates introduces in this release.