TypeScript Roadmap 2025-2026: What Awaits Developers

TypeScript Development Roadmap for 2025-2026: What the Team Has in Store for Developers

The TypeScript team continues to actively work on improving the language, and a number of significant innovations are planned for 2025-2026. The official roadmap, published in the project repository, covers both long-awaited features and fundamental changes aimed at improving performance and development convenience.

Let's break down the key directions of TypeScript development over the next two years.

Type Isolation — The Main Feature of 2025

One of the most anticipated innovations is the so-called "type isolation." This concept will allow for a clear separation of type-related code from executable code. The main goal is to make TypeScript more compatible with various runtimes and tools, including Bun, Deno, and Node.js (via the --experimental-strip-types flag).

Key aspects of type isolation:

• Strict separation of type and value imports (already partially implemented via type in imports).
• Simplified work with runtimes that natively execute TypeScript without prior compilation.
• Reduced confusion when exporting types — developers will be able to clearly indicate that only a type, not a value, is being exported.

Decorators and Metaprogramming

Although experimental decorators have been available for a long time, the TypeScript team plans to complete the standardization and implementation of next-generation decorators (Stage 3). In 2025-2026, expect:

• Full support for decorators on classes, methods, and accessors without needing to enable the experimental flag.
• Improved integration with decorators in popular frameworks (Angular, NestJS, TypeORM).
• The ability to use decorators for data validation and transformation at compile time.

Compiler Performance Improvements

Performance is a perennial pain point for TypeScript. In 2025-2026, the team plans to significantly speed up the compiler and editor support:

• Optimized incremental builds — reducing recompilation time when a single file is changed.
• Improved caching of types and modules for large projects (monorepo).
• Work on a new parser — expected to be 20-30% faster than the current one.

JSX Runtime Support and Improved DOM Handling

React developers will receive a number of improvements related to JSX. Planned features include:

• Automatic detection of the JSX factory type (React.createElement, Preact.h, Solid.js, etc.).
• Improved type inference for DOM events and attributes.
• Experimental support for JSX without React (e.g., for use in web components).

New Syntactic Features and Type Improvements

There will also be syntactic sugar. The roadmap highlights the following features:

• Conditional types with template support — more flexible work with strings and template literals.
• Destructuring