TypeScript
TypeScript is a programming language built on top of JavaScript that adds static type checking, helping developers catch errors during development rather than after deployment.
TypeScript is a superset of JavaScript, meaning any valid JavaScript code is also valid TypeScript. What TypeScript adds is a type system, the ability to declare what type of data a variable should hold, what arguments a function expects, and what shape an object should have. This lets your code editor and compiler catch errors before you even run the code.
It compiles down to regular JavaScript, so it runs anywhere JavaScript runs, browsers, Node.js servers, mobile apps, and more. The benefits of TypeScript grow with project size. For a small script, types might feel like overhead.
In practice
- A fintech company migrated their Node.js backend to TypeScript and reduced production bugs by 38% in the first quarter
- A startup's 3-person team used TypeScript from day one, enabling them to scale to 12 developers without the typical growing pains of a JavaScript codebase
- An agency adopted TypeScript for client projects and reduced QA cycles by 25% because many bugs were caught during development
- A healthcare platform required TypeScript for all new code after a critical production bug was caused by an undefined variable that types would have caught
More in Web development
- Responsive Design
- Progressive Web App (PWA)
- Single-Page Application (SPA)
- Server-Side Rendering (SSR)
- Static Site Generation (SSG)
- API (Application Programming Interface)
- CMS (Content Management System)
- Headless CMS
- Version Control
- CI/CD (Continuous Integration / Continuous Deployment)
- JavaScript Framework
- REST API
Not sure how this applies to you?
A senior engineer walks your site, your search presence and the way enquiries reach you, then writes down the three things worth fixing first. You keep the document either way.