Do you know when to use TypeScript (vs JavaScript and CoffeeScript)?

TypeScript is the new flagship language from Microsoft that compiles into JavasScript.

• Use JavaScript if you’re writing page specific script
• Use jQuery to improve cross-browser support
• Use TypeScript if you’re writing re-usable client side library

Don't use CoffeeScript (language is too different from JavaSript)

✅ Figure: Good - TypeScript is very similar to JavaScript so it’s easy to learn, and also helps developers learn proper JavaScript coding practices

❌ Figure: Bad – CoffeeScript syntax is very different from JavaScript so it takes longer to learn