0x Lang

0.1.29 verified Fri May 01 auth: no javascript

0x (v0.1.29) is an experimental AI-first programming language and compiler that transpiles a concise DSL into full-stack production code for React, Vue 3, Svelte 5, Express, React Native, and Terraform. It significantly reduces boilerplate — a component written in 18 lines of 0x typically generates ~96 lines of TypeScript React. The compiler is distributed as a CLI tool via npm, supports watch mode and project scaffolding, and ships with TypeScript types. Active development, monthly releases. Differentiators: multi-target compilation from a single source, built-in DSL for UI, state, and backend logic, and LSP/IDE support.

Common errors

error Error: Cannot find module '0x-lang' ↓

cause Package installed locally but not globally.

fix

Run npm install -g 0x-lang or use npx 0x-lang build ....

error TypeError: compile is not a function ↓

cause Using require('0x-lang') which returns the default export as an object with compile property? Actually default export is a function. Wrong import style.

fix

Use import compile from '0x-lang' (ESM) or const compile = require('0x-lang').default (CJS).

error error: unknown option `--target' ↓

cause Using older version <0.1.0 that used --format instead.

fix

Upgrade to >=0.1.0 or use --format if on older version: 0x build app.ai --format react.

Warnings

breaking Version 0.1.0 changed output format from JSON to source files. Older versions' `0x build --format json` no longer works. ↓

fix Upgrade to >=0.1.0 and use `0x build` (defaults to source files). For JSON output, pipe through a custom formatter.

breaking Requires Node.js >=18; fails silently on Node 16 with obscure errors. ↓

fix Update Node.js to 18+ using nvm or your package manager.

deprecated The `--format` flag (`--format react`, `--format vue`) is deprecated as of v0.1.0. Use `--target react` instead. ↓

fix Replace `--format` with `--target` in CLI commands. Example: `0x build app.ai --target react`.

gotcha Generated React components use React 18's createRoot; not compatible with React 17 automatically. ↓

fix Ensure your project uses React 18+. If stuck on React 17, compile with `--target react-17`? No such option — fork or avoid.

Install

npm install 0x-lang

yarn add 0x-lang

pnpm add 0x-lang

Imports

0x CLI
wrong
```
npm install 0x-lang (local install requires npx or global)
```
correct
```
npm install -g 0x-lang
```
The package is primarily a CLI tool. Install globally for '0x' command, or use npx 0x-lang for one-off runs.
default export (programmatic use)
wrong
```
const { compile } = require('0x-lang')
```
correct
```
import compile from '0x-lang'
```
Programmatic API is ESM-only starting v0.1.0; CJS require works only for default export.
build command (watch mode)
wrong
```
0x watch counter.ai (no such command)
```
correct
```
0x dev counter.ai --target react
```
Use 'dev' subcommand for watch/recompile mode.

Quickstart

Installs the 0x-lang CLI globally, creates a minimal 0x source file with a stateful page component, and compiles it to a React component.

npm install -g 0x-lang
cat > hello.ai << 'EOF'
page Hello:
  state name: str = "World"
  layout col gap=16 padding=24 center:
    text "Hello, {name}!" size=3xl bold
    input name placeholder="Your name"
EOF
0x build hello.ai --target react