Overview

TypeScript brings static types to JavaScript, allowing developers to build robust and reliable codebases.

benefits

The benefits of static types are not TypeScript-specific:

• Enable static code analysis, which operates on code as-is (without the need to run the code)
• Make the codebase more robust and reliable

TypeScript tooling ecosystem

• The language service tool runs in the background at dev-time, and monitors open files continuously (part of the Language Server Protocol).
• The type checker is invoked on-demand to type-check the entire project (tsc)
• The compiler (also called transpiler) transpiles TS files to JS. (Transpiling doesn't require type-checking so it can be done by separate tools).