{"id":25976,"library":"nejs","title":"NeJS","description":"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 Superseded by Babel (formerly 6to5).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.","status":"deprecated","version":"0.1.19","language":"javascript","source_language":"en","source_url":"git://github.com/kobezzza/NeJS","tags":["javascript","ecmascript6","transpiler"],"install":[{"cmd":"npm install nejs","lang":"bash","label":"npm"},{"cmd":"yarn add nejs","lang":"bash","label":"yarn"},{"cmd":"pnpm add nejs","lang":"bash","label":"pnpm"}],"dependencies":[],"imports":[{"note":"NeJS is CLI-only; no programmatic API. Install globally.","wrong":"const NeJS = require('nejs'); // No CommonJS API","symbol":"NeJS","correct":"No package exports; use CLI: nejs [options] [dir/file]"}],"quickstart":{"code":"npm install -g nejs\nnejs --help","lang":"javascript","description":"Installs globally and shows help; no code example due to lack of API."},"warnings":[{"fix":"Migrate to Babel: npm install -g babel-cli; babel script.js","message":"NeJS is deprecated; use Babel (formerly 6to5) instead.","severity":"deprecated","affected_versions":">=0.0.0"},{"fix":"Use child_process or switch to a library with API.","message":"No programmatic API; only CLI usage.","severity":"breaking","affected_versions":">=0.0.0"},{"fix":"Use Babel for full ES6+ support.","message":"Only supports a subset of ES6 features: let/const, arrow functions, rest/default/named parameters.","severity":"gotcha","affected_versions":">=0.0.0"},{"fix":"Switch to an actively maintained transpiler.","message":"No longer maintained; last release 2015.","severity":"breaking","affected_versions":">=0.0.0"}],"env_vars":null,"last_verified":"2026-05-01T00:00:00.000Z","next_check":"2026-07-30T00:00:00.000Z","problems":[{"fix":"Use CLI: nejs [options]; or install globally and run as child process.","cause":"Trying to require('nejs') in Node.js; no programmatic API.","error":"Cannot find module 'nejs'"},{"fix":"Run: npm install -g nejs","cause":"NeJS not installed globally.","error":"nejs: command not found"},{"fix":"Use Babel instead for full ES6 support.","cause":"ES6 features not supported by NeJS (e.g., classes, template literals).","error":"SyntaxError: Unexpected token"}],"ecosystem":"npm","meta_description":null,"install_score":null,"install_tag":null,"quickstart_score":null,"quickstart_tag":null}