Development
TypeScript
JavaScript with a type system.
// What it is
You tell it this variable is a number. The compiler catches it when someone assigns a string.
// Why your business should care
Production bugs drop by 15–25%. Lower maintenance costs, faster onboarding.
// Common myth
"JavaScript is enough." It is. Until your project crosses 10,000 lines and you're trying to remember whether that function returns an object or null.
Verdict:
Mandatory for any serious project. Only argument against is the learning curve in the first week.