JSXTSX

JSXTSX is a term encountered in discussions of React development that refers to a hypothetical language extension or dialect combining JSX syntax with TypeScript-style type checking. In this concept, components written with JSX syntax would benefit from static type information typically associated with TSX, while preserving the familiar JSX feel.

The idea stands apart from the standard TSX extension used by TypeScript, and is not an official specification. Proponents imagine JSXTSX as either a superset of JSX with stricter types or as an alternate transpilation target that enforces type-safe props, component return types, and more robust inference in JSX code.

Typical features described for JSXTSX include: explicit prop and component interfaces, generic components, improved inference for element types, better support for discriminated unions in UI components, and optional runtime type checks. Editors and IDEs would leverage the extended type information to provide autocompletion and error diagnostics in JSX blocks.

Implementation typically relies on a transpiler or compiler plugin that translates JSXTSX into standard JavaScript, with optional runtime checks. It would need to interoperate with existing React libraries, and could reuse the TypeScript compiler pipelines or babel-based tooling, possibly introducing new syntax plugins.

As of adoption, JSXTSX remains speculative and experimental rather than standardized. It is mentioned mainly in community discussions and experimental projects, with no official maintenance status or broad tooling support. If a future ecosystem adopted JSXTSX, migration paths would hinge on compatibility with current TSX and React ecosystems.