Welcome to XCODX Online Compiler
Quick Start:
Ctrl+Enter Run code
Ctrl+S Save / Download
Ctrl+L Clear output
Select a language and start coding.
CoffeeScript, released by Jeremy Ashkenas in 2009, compiles to JavaScript and did more than perhaps any other language to shape modern JS: arrow functions, destructuring, default parameters, and classes all appeared in CoffeeScript before ES6 adopted them. Its whitespace-based syntax strips away braces and semicolons, leaving code that reads close to pseudocode. CoffeeScript 2 outputs modern JavaScript and remains maintained, and the language still lives in long-running Rails codebases, older Atom-era packages, and GitHub's historical tooling. This page compiles your CoffeeScript and runs it on Node.js in an interactive terminal, so readline prompts wait for real typed input while console output streams back live.
square = (n) -> n * n
console.log "Hello from CoffeeScript!"
console.log "#{n} squared is #{square n}" for n in [1..4]
inventory =
apples: 3
bananas: 5
console.log "#{fruit}: #{count}" for fruit, count of inventory
readline = require 'readline'
rl = readline.createInterface input: process.stdin, output: process.stdout
rl.question 'What is your name? ', (name) ->
console.log "Welcome, #{name}!"
rl.question 'Favorite number? ', (num) ->
console.log "#{num} doubled is #{Number(num) * 2}"
rl.close()CoffeeScript work today is mostly maintenance and translation: developers inheriting Rails apps with .coffee asset pipelines, teams decommissioning Atom editor packages, and engineers converting legacy code to TypeScript who need to confirm what a tricky comprehension or fat arrow actually does. It also remains a compact illustration for JavaScript history lessons, showing students where ES6 features originated. Running suspicious legacy snippets here, with real Node semantics and interactive input, is faster than resurrecting an old build chain just to observe one function's behavior.
The compiled output runs on Node.js, so use Node's readline module exactly as in JavaScript: create an interface over process.stdin and call rl.question with a callback. The live terminal keeps the process open and delivers your typed line to the callback, letting you nest questions for multi-step prompts as the example shows.
Your source is compiled by the CoffeeScript 2 compiler, which emits modern JavaScript including native classes and arrow functions, and the result executes on a current Node.js runtime. That means Promises, async/await via CoffeeScript's await keyword, and contemporary built-ins behave the same as they would in a present-day Node project.
For new projects the ecosystem has consolidated on TypeScript and modern JavaScript, which absorbed CoffeeScript's best ideas. Reading fluency is the practical skill: plenty of production Rails and legacy Node code still ships .coffee files, and being able to run, verify, and translate that code accurately is a genuinely marketable maintenance capability.
main.coffeecoffeescriptno standard input constructconsole.log "Hello from CoffeeScript!"
console.log "Welcome to XCODX Online Compiler!"
message = "CoffeeScript is elegant!"
console.log message