NeJS

0.1.19 verified Fri May 01 auth: no javascript deprecated

A deprecated ECMAScript 6 to ECMAScript 3 transpiler. Last release v0.1.19, no updates since 2015. Supports let/const, arrow functions, rest/default/named parameters. Superseded by Babel (formerly 6to5). Not maintained; use Babel or modern transpilers.

Common errors

error Cannot find module 'nejs' ↓

cause Trying to require('nejs') in Node.js; no programmatic API.

fix

Use CLI: nejs [options]; or install globally and run as child process.

error nejs: command not found ↓

cause NeJS not installed globally.

fix

Run: npm install -g nejs

error SyntaxError: Unexpected token ↓

cause ES6 features not supported by NeJS (e.g., classes, template literals).

fix

Use Babel instead for full ES6 support.

Warnings

deprecated NeJS is deprecated; use Babel (formerly 6to5) instead. ↓

fix Migrate to Babel: npm install -g babel-cli; babel script.js

breaking No programmatic API; only CLI usage. ↓

fix Use child_process or switch to a library with API.

gotcha Only supports a subset of ES6 features: let/const, arrow functions, rest/default/named parameters. ↓

fix Use Babel for full ES6+ support.

breaking No longer maintained; last release 2015. ↓

fix Switch to an actively maintained transpiler.

Install

npm install nejs

yarn add nejs

pnpm add nejs

Imports

NeJS

wrong

const NeJS = require('nejs'); // No CommonJS API

correct

No package exports; use CLI: nejs [options] [dir/file]

NeJS is CLI-only; no programmatic API. Install globally.

Quickstart

Installs globally and shows help; no code example due to lack of API.

npm install -g nejs
nejs --help