📢 TypeScript 4.0 is now available with new features

Microsoft releases TypeScript 4.0. This version of the language represents the next generation of TypeScript releases, as Microsoft dives deeper into expressivity, productivity, and scalability.

With TypeScript 4.0, though there are no major breaking changes, it contains a set of new features that will boost your productivity to build web applications without writing any JavaScript code.

TypeScript is a core part of many people’s JavaScript stack today. If you’re not familiar with TypeScript, it’s a language that builds on top of JavaScript by adding syntax for static types. You can then use the TypeScript compiler to strip away types from your code, and leaving you with clean, readable JavaScript that runs anywhere.

What's new in TypeScript 4.0?

TypeScript 4.0 comes with new features. With this version, you can now represent higher-order operations on tuples and arrays, labels to tuples types, control flow analysis to determine the types of properties in classes, use of short-circuiting assignment operators, and many improvements to the editor.

Here's a list of new features added to TypeScript 4.0:

• Variadic Tuple Types
• Labeled Tuple Elements
• Class Property Inference from Constructors
• Short-Circuiting Assignment Operators
• unknown on catch Clauses
• Custom JSX Factories
• Speed Improvements in build mode with --noEmitOnError
• --incremental with --noEmit
• Editor Improvements
  • Convert to Optional Chaining
  • /** @deprecated */ Support
  • Partial Semantic Mode at Startup
  • Smarter Auto-Imports

How to download TypeScript 4.0?

If you are already using TypeScript in your project, you can either get it through NuGet or use npm with the following command:

npm install -D typescript

You can also get the editor support of TypeScript 4.0 by downloading the latest version of Visual Studio 2017 or Visual Studio 2019. If you are using the insiders version of the Visual Studio Code, you will have to follow the directions to use a newer version of TypeScript.