Statically typed languages that compile to JavaScript, such as TypeScript and PureScript, offer distinct approaches and features designed to enhance code quality and developer productivity. TypeScript, created by Microsoft in 2012, extends JavaScript by adding type annotations, essentially making it a superset of JavaScript that easily integrates with existing JS code and tools, thereby promoting large-scale application development. In contrast, PureScript, inspired by Haskell and created in 2013, emphasizes functional programming principles with features like immutability, pattern matching, and currying, which aim to ensure code correctness and purity. Both languages compile to JavaScript, but while TypeScript is closely aligned with JavaScript's evolving standards, PureScript maintains a functional language structure, requiring JavaScript interaction through specific bindings. TypeScript's popularity soared with major frameworks like Angular adopting it, leading to a robust ecosystem with vast learning resources, whereas PureScript, though less popular, provides strong guarantees through its rigid functional paradigm. This discussion highlights how choosing between these languages involves considering the balance between code correctness and development speed, as well as team familiarity with functional or object-oriented practices.