Javascript

TypeScript 3.0 introduced the unknown type, which is described as being: “Like any, but type-safe”. This is an exploration of what that means in the Javascript and TypeScript ecosystems. and how that can be compared to strongly-typed languages like Java.

A fairly recent addition to Typescript is index types and the keyof operator.

ECMAScript is all about wrangling loosely typed variables.

When learning a language built on another existing platform, like TypeScript (or, for that matter Kotlin), one of the challenges you face is understanding the underlying platform or language so that you can, in turn, understand how the higher-level language is applied to meet the restrictions and features of the lower-level language.