Aster by AsterWisevsTypeScript Compiler

Pros

Cons

Pros

• Integrated with most IDEs (VS Code, WebStorm) for real‑time error feedback, making compilation a part of the development workflow.
• Provides static type checking on top of JavaScript, catching type‑related bugs at compile time and improving code reliability.
• Supports modern ECMAScript features (decorators, async/await, optional chaining) and compiles down to any JS version (ES3 – ESNext).

Cons

• Compilation speed slows significantly for large codebases (100k+ LOC) despite incremental mode; project references only partially mitigate this.
• Type inference can be overly aggressive, sometimes hiding actual runtime issues when using any or @ts‑ignore workarounds.
• Does not perform runtime validation – types are erased, so runtime safety still requires extra checks (e.g., with Zod or io‑ts).