First, some background: TypeScript uses a kind of duck typing that considers two objects to be "the same type" if they have matching properties. Here, as an example, is a CustomerClass (with two ...

The latest version of TypeScript provides developers with tools to create base classes and class hierarchies just like the other object-oriented languages.

In conjunction with import type, TypeScript 3.8 also adds a compiler flag to control what happens with imports that won’t be used at runtime: importsNotUsedAsValues.