JAVASCRIPT STARTER · LOCAL LEARNING

Start with one line of JavaScript,
practice a little every day.

No account or environment setup required. Write JavaScript on iPhone, iPad, or Mac and see the result immediately.

Node.js + V8 · TypeScript · Web projects · Local servers

main.js

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

console.log(greet("JavaScript"));

▶ RUNHello, JavaScript!

Run locallyYour code stays on your device

Node.js + V8Bundled local runtime

Learn by doing20 free lessons · 6 paid courses

A focused JavaScript workspace

Less setup,
more practice.

Editing, execution, input, output, and lessons in one clear workspace.

01 / WRITE

Edit multiple source files with automatic saving, copy, paste, undo, and native keyboard input.

constforconsole.log()

02 / RUN

Bundled Node.js and V8 run console and server code locally. WebKit displays your web pages.

$ node main.js
✓ process finished

03 / LEARN

Explore learning points, worked examples, course checks, and reference implementations. Learning Pro adds six paid courses.

42Exit code 0 · Local run

Three small steps

No account, complex project, or Node.js installation needed.

1
Create a practice project
Start with Hello World, or use IDE Pro to create TypeScript, web, or client/server projects.
2
Run your program
Run your program locally, view a web page, or start an Express or Hono server.
3
Read the feedback
Review output and exceptions, then try again.

Made for practice

JavaScript Starter is now available on the App Store.