React Compiler Marker

Universal IDE extension that shows which React components are optimized by the React Compiler. See at a glance which components get automatically memoized ✨ and which ones have issues preventing optimization 🚫

Features

• Visual emoji markers next to React components (customizable)
• Hover tooltips with optimization details and error messages
• Preview compiled output to see what the React Compiler generates
• Generate reports for a full-project compilation snapshot
• Commands to activate/deactivate markers or check individual files
• Configurable babel plugin path for custom setups

Supported IDEs

IDE	Installation
VS Code / Cursor / Antigravity	VS Code Marketplace | Open VSX
WebStorm / IntelliJ IDEA	IntelliJ marketplace
Neovim	Setup instructions
Zed (alpha)	Setup instructions

Project Structure

This is a monorepo containing:

packages/
  cli/              # CLI for generating reports
  server/           # LSP server (shared by all clients)
  vscode-client/    # VS Code extension
  intellij-client/  # WebStorm/IntelliJ plugin
  nvim-client/      # Neovim plugin
  zed-client/       # Zed extension

Each client has its own version and release cycle. See individual READMEs for client-specific documentation:

• CLI
• VS Code Client
• IntelliJ Client
• Neovim Client
• Zed Client
• LSP Server

Quick Start

CLI

npx react-compiler-marker

Generate a full-project report from the command line. Supports text, HTML, and JSON output formats.

# Text summary (default)
npx react-compiler-marker .

# Interactive HTML report
npx react-compiler-marker --format html .

# JSON for CI pipelines
npx react-compiler-marker --format json . > report.json

See the CLI README for all options.

VS Code / Cursor / Antigravity

1. Install from VS Code Marketplace or search "React Compiler Marker" in Extensions
2. Open a React component file - markers appear automatically

WebStorm / IntelliJ IDEA

1. Build the plugin: cd packages/intellij-client && ./gradlew buildPlugin
2. Install from disk: Settings > Plugins > Install Plugin from Disk
3. Select build/distributions/react-compiler-marker-*.zip

Neovim

Using lazy.nvim:

{
  'blazejkustra/react-compiler-marker',
  ft = { 'javascript', 'javascriptreact', 'typescript', 'typescriptreact' },
  build = './scripts/build-nvim.sh',
  opts = {},
}

Open a React component file - markers appear automatically.

Requirements: Neovim 0.9+ (0.10+ recommended for native inlay hints), Node.js, babel-plugin-react-compiler in your project.

See the Neovim Client README for configuration options and other package managers.

Zed

Note: The Zed extension is not yet available in the Zed extension registry. For now, you need to download and install it manually.

See the Zed Client README for installation and configuration options.

Links

• GitHub Repository
• VS Code Marketplace
• Open VSX Registry
• Jetbrains Marketplace
• React Compiler Documentation

Contributing

See CONTRIBUTING.md for development setup and guidelines.

License

MIT