Q1: What is TypeScript and what are its core advantages over plain JavaScript?
TypeScript is a strongly typed, open-source programming language developed by Microsoft that builds on JavaScript by adding syntactical type declarations.
Core Advantages
- Static Type Checking: Catches errors at compile time rather than runtime.
- Enhanced IDE Support: Enables intelligent autocompletion, refactoring, and code navigation.
- Downlevel Compilation: Transpiles modern ECMAScript features down to older ES versions (ES5/ES3).
- Explicit Self-Documenting Code: Interfaces and type aliases act as living documentation.
Key Takeaways
- TypeScript is a strict syntactical superset of JavaScript.
- All valid JavaScript code is valid TypeScript code.