Why Microsoft Adopted TypeScript for VS Code

Motivation for Choosing TypeScript

JavaScript has been the go-to language for web development, providing flexibility and ease of integration with the web. However, as applications grew more complex, developers faced challenges with type safety, compiler support, and long-term maintainability. TypeScript, a statically typed language that builds on JavaScript, addresses these issues. It also offers a smoother developer experience by providing better tooling and a robust type system, making it a safer and more comfortable alternative to plain JavaScript. This is why Microsoft chose TypeScript for building Visual Studio Code (VS Code), the popular multi-platform editor.

Adoption of TypeScript by Google

Google's adoption of TypeScript for Angular indicates that even giant tech companies recognize the benefits of a statically typed language. If Google, known for its cutting-edge technologies, uses TypeScript, there is a strong argument for Microsoft to also adopt it for Visual Studio Code (VS Code). Microsoft, with its own statically typed language, .Net, has a unique advantage in choosing a language that complements its existing technology stack and enhances developer productivity.

Background of TypeScript Development

The development of TypeScript was a collaborative effort led by a team of over 50 highly skilled developers at Microsoft. Among them, the most recognizable names are Anders Hejlsberg, a Technical Fellow at Microsoft, and Steve Lucco, another Technical Fellow. Anders Hejlsberg is famously known as the father of languages like C# and TurboPascal. However, he did not initiate the TypeScript project; instead, credit goes to Steve Lucco, who started the TypeScript team and co-designed the language.

Motivations for Supporting JavaScript Tooling

Microsoft's motivation to enter the JavaScript tooling space stems from the experiences of other teams within the company. The Bing Maps and Office 365 teams, for instance, faced challenges with scaling JavaScript development. The TypeScript team has worked closely with these teams to provide better tools and support for maintaining complex JavaScript applications. Additionally, the development of Office Web Apps and Windows 8 apps also required the use of TypeScript to ensure maintainability and scalability.

Role of Key Team Members

Steve Lucco, Chief Architect for Javascript runtime and tools, led the development of the TypeScript compiler. Luke Hoban, a program manager with experience in JavaScript language and development experience, has been working closely with the TypeScript team. Erich Gamma, a distinguished engineer and expert in the Eclipse project, also played a key role in the development of TypeScript.

Around the TypeScript Team

The TypeScript team has been working on a project that combines anthropological and technical approaches. Their focus has been on improving the JavaScript developer experience, especially in scenarios where JavaScript scale is a concern. The team has sought to understand the specific challenges faced by developers and has worked to provide solutions that enhance the productivity and maintainability of JavaScript applications.