Why TypeScript over JavaScript

Many beginners ask: why not just use JavaScript?

JavaScript is great, but

As projects grow:

• files increase
• logic becomes complex
• bugs hide in corners

JavaScript does not tell you:

• what shape data should have
• what a function expects
• what it returns

TypeScript gives answers

With types, code becomes self-explanatory.

function getUser(id: number): { name: string; age: number } {
  return { name: "Tom", age: 25 };
}

Anyone reading this knows:

• id must be a number
• result has name and age

Benefits in real teams

• fewer runtime crashes
• easier refactoring
• better IDE support
• safer onboarding for new developers

AI tools and TypeScript

AI code tools work better when:

• types describe intent
• structures are clear
• APIs are explicit

That makes TypeScript very friendly for AI-assisted development.

Remember

• JavaScript is flexible
• TypeScript is disciplined
• discipline saves time in big projects