TypeScript
Definition
TypeScript is an open-source programming language developed by Microsoft that extends JavaScript with static typing. It allows developers to define data types for variables, functions, and objects, reducing errors during development and improving code maintainability.
Because TypeScript compiles down to plain JavaScript, it runs in any environment where JavaScript is supported, including web browsers, Node.js, and mobile frameworks. It is widely adopted for medium to large-scale applications where reliability and scalability are critical.
Advanced
At an advanced level, TypeScript introduces features such as interfaces, generics, enums, and advanced type inference. It integrates seamlessly with modern frameworks like Angular, React, and Vue, providing better tooling and editor support through IntelliSense and autocompletion.
TypeScript also improves collaboration in large teams by making contracts between different parts of an application explicit. It supports gradual adoption, meaning developers can mix JavaScript and TypeScript in the same project, easing migration.
Why it matters
Use cases
Metrics
Issues
Example
A fintech startup adopts TypeScript for its React application. By using strong typing and interfaces, the team reduces bugs related to inconsistent data handling. As the application grows, TypeScript helps maintain clarity across modules, leading to faster onboarding of new developers and fewer production issues.