🟨 JavaScript Code Runner

Write and execute JavaScript code directly in your browser. Perfect for learning and testing code snippets.

Code Editor

ES2023+

Input

Output

Click "Run Code" to see the output here

Basic console.log statement

console.log('Hello, World!');

Working with variables and calculations

const x = 10; const y = 20; console.log(x + y);

Working with arrays and for loops

for (let i = 0; i < 5; i++) console.log(i);

Creating and using functions

const greet = (name) => `Hello, ${name}!`;

Working with objects

const student = { name: 'Alice', age: 20 };

ES6 class syntax and methods

class Person { constructor(name) { this.name = name; } }