HomeWinBuzzer NewsMicrosoft Launches TypeScript 5.5 With Many Improvements

Microsoft Launches TypeScript 5.5 With Many Improvements

Key updates include inferred type predicates, advanced control flow narrowing for constant indexed accesses, and the JSDoc import tag.

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has introduced the latest iteration of its JavaScript-based language, TypeScript 5.5. Developers can now download the updated version via NuGet or npm using straightforward commands.

Visual Studio and Visual Studio Code users were already engaging with TypeScript, thanks to its high-level editor functionalities. These development environments offer features like auto-completion, code navigation, and refactoring, greatly enhancing the coding workflow by leveraging TypeScript's capabilities.

Noteworthy Additions and Updates

TypeScript 5.5 aims at increasing developer efficiency with several new features. Key updates include inferred type predicates, advanced control flow narrowing for constant indexed accesses, and the JSDoc import tag. Additionally, regular expression syntax validation, new ECMAScript Set methods support, isolated declarations, and package.json dependency consultation for generating declaration files are part of this update. Performance and file size enhancements have also been made.

Significant changes encompass the deprecation of features since TypeScript 5.0, stricter decorator parsing, and the discontinuation of using ‘undefined‘ as a type name. The update also introduces the transpileDeclaration API and simplifies reference directive declaration.

Looking Ahead: TypeScript 5.6

Following the release of TypeScript 5.5, Microsoft is already prepping for TypeScript 5.6, slated for an early September launch. Developers interested in early features can access nightly builds of TypeScript 5.6 through npm, refreshed every midnight PST. While these nightly versions are experimental and may include bugs, setup guidelines for integrating with popular IDEs like VS Code, , Sublime Text, and IntelliJ are available in the nightly documentation.

For more detailed information about TypeScript 5.5's new features and setup instructions for nightly builds, you can check out Microsoft's official documentation.

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Markus Kasanmascheff
Markus Kasanmascheff
Markus is the founder of WinBuzzer and has been playing with Windows and technology for more than 25 years. He is holding a Master´s degree in International Economics and previously worked as Lead Windows Expert for Softonic.com.