What are the advantages of TypeScript?

TypeScript adds static typing to JavaScript, which provides several advantages:

• Early error detection — type errors are identified at compile time rather than during execution.
• Enhanced IDE support — autocomplete, refactoring, and code navigation work more accurately.
• Code documentation — types serve as explicit documentation, simplifying code understanding.
• Support for modern JS features — TypeScript compiles to JavaScript compatible with various browsers.
• Scalability — in large projects, typing helps maintain the codebase.

Example:

function sum(a: number, b: number): number {
  return a + b;
}

sum(5, 10); // correct
sum('5', 10); // compile-time error