ReScript

Spec sheet

What it does

ReScript is a strongly typed language that compiles to clean, efficient JavaScript.Read 4 Oct 2026 · rescript-lang.org

Purpose

ReScript is a strongly typed language that compiles to clean, efficient JavaScript.Read 11 Oct 2026 · rescript-lang.org

Intended users

The maker describes ReScript as suitable for JavaScript, Node, and ReactJS applications, including mission-critical products.Read 4 Oct 2026 · rescript-lang.org

Founded

2015Read 28 Sep 2026 · rescript-lang.org

Build speed

ReScript describes its compiler and build system as designed for fast feedback loops across codebases of any size.Read 4 Oct 2026 · rescript-lang.org

Community support

Official questions can be posted in the forum or GitHub repositories, while Stack Overflow is described as not frequently monitored.Read 11 Oct 2026 · rescript-lang.org

Community supported editors

The editor guide lists IntelliJ IDEA and Emacs as community supported and says they are not officially supported.Read 4 Oct 2026 · rescript-lang.org

Compatibility limit

The installation guide notes that Yarn versions above 1 require nodeLinker set to node-modules.Read 11 Oct 2026 · rescript-lang.org

Compiler

The compiler generates optimized, readable JavaScript and the manual says a Hello World program generates 20 bytes of JavaScript.Read 11 Oct 2026 · rescript-lang.org

Ecosystem

Existing JavaScript package managers, bundlers, frameworks, and test runners work with ReScript.Read 11 Oct 2026 · rescript-lang.org

Editor support

The editor plugin provides syntax highlighting, autocomplete, type hints, formatting, code navigation, and code analysis; the guide lists VS Code, Vim/Neovim, and Zed.Read 4 Oct 2026 · rescript-lang.org

Editor tooling

The project documents a VS Code extension and says it provides memory-friendly VS Code and Vim plugins.Read 11 Oct 2026 · rescript-lang.org

Gradual adoption

The homepage says ReScript can be adopted gradually and a project can continue functioning with its generated JavaScript after removing ReScript source files.Read 11 Oct 2026 · rescript-lang.org

JavaScript interop

ReScript can import JavaScript and TypeScript code, export code to JavaScript, and generate TypeScript types with genType.Read 11 Oct 2026 · rescript-lang.org

Node.js

ReScript-compiled JavaScript can run in Node.js, and installation requires Node.js version 22 or later.Read 11 Oct 2026 · rescript-lang.org

Open source

The ReScript Association describes ReScript as an open source platform supported by industrial users.Read 11 Oct 2026 · rescript-association.org

Open source and organization

The ReScript Association describes ReScript as an open source platform and says it supports development of the language and its OCaml technical foundation.Read 4 Oct 2026 · rescript-association.org

Package managers

The installation guide lists npm, Yarn, pnpm, Bun, and Deno as supported package manager options.Read 11 Oct 2026 · rescript-lang.org

Project templates

The official project generator provides starter projects for Next.js or Vite with React and Tailwind CSS.Read 4 Oct 2026 · rescript-lang.org

React

The official site offers first-class React bindings and starter templates using React and Tailwind CSS.Read 11 Oct 2026 · rescript-lang.org

React integration

The `@rescript/react` package provides bindings for React, ReactDOM, ReactDOMServer, React events, and other React modules.Read 4 Oct 2026 · rescript-lang.org

Runtime and package managers

The installation guide requires Node.js version 22 or later and lists npm, yarn, pnpm, bun, and deno as package manager options.Read 4 Oct 2026 · rescript-lang.org

Security analysis

The editor code analyzer can detect dead code and unhandled exceptions, and the guide notes that its exception analysis does not understand generic exceptions.Read 4 Oct 2026 · rescript-lang.org

Type system

The type system infers types and guarantees that values not marked nullable will not be undefined.Read 11 Oct 2026 · rescript-lang.org

Where Specifiction places it

• Code Transpilers#24 of 287.2