In this article, we answer the most frequently asked questions about the TS programming language and its use.
How did TypeScript originate?
What is TypeScript?
By incorporating optional static typing, TypeScript allows programmers to catch potential type-related errors at compile-time rather than runtime, enhancing code reliability and maintainability. It provides powerful tools for large-scale application development, including the ability to define custom types, leverage object-oriented programming principles, and use advanced type-checking.
Why do you need TypeScript?
Here are the reasons why you should use TypeScript for your software development projects.
2. Static typing
3. Class-based features
TypeScript adds types to traditional OOP (Object-Oriented Programming) features like classes, interfaces, and namespaces. This makes it easier to manage and organize code, especially for larger projects.
4. Compile time type checking
6. Advanced types
TS introduces advanced types like union types, intersection types, and type guards. It also provides utilities for type manipulation like
TypeScript lets developers build new types from existing ones. One of its core features is generics, which makes it easier to reuse types. Plus, TS offers many type operators, which add even more flexibility. By merging different type operators, you can express complex operations and values in a concise and maintainable manner.
7. Definition files
Even if a library is not written in TypeScript, you can use “definition files” (with a
.d.ts extension) to provide type information for that library. This allows you to get the benefits of type checking and autocompletion when using third-party libraries.
8. Tooling and development environment
One of the strengths of TypeScript lies in its development environment and tooling. The TypeScript compiler (
Visual Studio Code provides first-class support for TypeScript. This includes features like IntelliSense, which offers auto-completion, refactoring, and inline type-checking, elevating the development experience to new heights.
Development tools & frameworks
Is TypeScript frontend or backend?
TypeScript can be used both in frontend and backend development. It’s all about where you choose to use it.
Frontend: TypeScript is commonly used in frontend development, especially with frameworks and libraries like Angular, React, and Vue. It helps programmers catch type-related errors at compile time, which can lead to more robust and maintainable code in large-scale frontend applications.
Backend: TypeScript can also be used for backend development. For instance, with Node.js, many developers prefer using TypeScript for the added benefits of static typing. Frameworks like NestJS, for example, are built with TypeScript in mind for backend applications.
How to install TypeScript?
Below, you will find useful references for installing TS.
- This quick guide provides essential details on the pre-installation prerequisites, installation steps, and various options you can use.
- If you need a step-by-step tutorial for TS installation on Windows, refer to this tutorial.
- When you encounter difficulties, ask your question on the StackOverflow TS forum or this specific subreddit on Reddit. The proactive community is always ready to assist beginners with detailed explanations, whether they’re related to installation issues or programming challenges.
How to compile TypeScript?
When do programmers have to use TS?
Functional languages are popular for backend development because they provide a strong mathematical foundation for programming. On the frontend, TypeScript helps catch errors and ensures that data sent between the frontend and backend matches expectations. Together, they make web applications more reliable and easier to manage. Learn more in our blog post “How to Write TypeScript Like a Haskeller.”
How to run typescript in VSСode?
Watch this video to learn how to install and set up TypeScript in Visual Studio Code, transpile and debug your TS program with NodeJS.
How to write and manage SQL server using TS?
Blending the strong typing and structure of TypeScript with SQL server management can lead to more robust and maintainable database applications. However, when you use TypeScript for server code, figuring out how to interact with your database can be tricky. This article offers an in-depth guide on the issue.
Further reading and resources
If you’re eager to explore TypeScript further, there’s an abundance of resources available, from official documentation to community-driven tutorials and courses. Here are some useful links:
Tutorials & blogs
- The TypeScript Handbook: The handbook is divided into two main sections. The “TypeScript Handbook” offers a comprehensive guide to TypeScript for regular programmers, explaining its features and behaviors without delving into every minute detail. While it’s not a complete language specification, by the end, readers should understand common TypeScript syntax, the effects of significant compiler options, and be able to predict the type system behavior in most situations. The “Reference Files” section, located below the handbook in the navigation, provides in-depth insights into specific TypeScript concepts without focusing on continuity, allowing readers to gain a deeper understanding of individual topics.
- Official documentation: Here, you’ll find detailed explanations, best practices, and in-depth insights provided by the creators and maintainers of TypeScript.
- TypeScript Evolution: In this blog by Marius Schulz a Front End Engineer at Meta who works on Threads and Instagram, you will find a series of 45 posts on various aspects of TS, such as “Built-In Type Declarations in TypeScript,” “Improved Inference for Literal Types in TypeScript,” “Spelling Correction in TypeScript,” and more.
- Effective TypeScript: 62 Specific Ways to Improve Your TypeScript by Dan Vanderkam: This book offers 62 targeted strategies to refine your TypeScript skills. It is written by Dan Vanderkam, a lead software engineer at Sidewalk Labs. By the end, you’ll go from knowing the basics of TypeScript to understanding its advanced features.
- TypeScript Error Translator Extension for VS Code: TypeScript errors can be hard to understand. This tool makes them easy to read right in your IDE.
- TypeScript Bootcamp: Zero to Mastery: This ZTM course covers everything from basics to advanced topics. It starts with TypeScript setup, teaches fundamentals like variables and functions, then dives into complex subjects like classes and asynchronous coding. Learners also work on projects like building a weather app and integrating TypeScript in both frontend and backend systems. The course stays updated with the latest TS practices.
To learn more about TypeScript, read our earlier blog posts: