TypeScript 5.0 Beta Released, Implementing New Decorator Standard

The first beta version of TypeScript 5.0 has been released. This release brings many new features, such as implementing a new decorator standard, better support for ESM projects in Node and packaging tools, new ways for library authors to control generic inference, extending JSDoc functionality, simplified configuration, and other improvements introduced. The goal is to make TypeScript smaller, simpler, and faster.

major changes

• new decorator
• consttype parameter
• extendsSupport for multiple configuration files
• enums The type has become Unionenums
• --moduleResolution bundler
• Resolution Customization Flags
• --verbatimModuleSyntax
• supportexport type *
• JSDoc support@satisfies
• JSDoc support@overload
• Support for --buildpassing Emit-Specific Flags
• perfect switch/case
• Optimized for speed, memory and package size
• breaking change

See the release announcement for details .