Open main.js and practice
Automatic saving with copy, paste, undo, and native keyboard input.
constforconsole.log()
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.
JavaScriptCore · Local projects · Beginner lessons · Offline execution
const greet = name =>
`Hello, ${name}!`;
console.log(greet("JavaScript"));▶ RUNHello, JavaScript!
Run locallyYour code stays on your device
JavaScriptCoreApple's native engine
Learn by doing4 sections · 20 lessons
A focused JavaScript workspace
Less setup,
more practice.
Editing, execution, input, output, and lessons in one clear workspace.
Execute on the device
Apple JavaScriptCore runs your code locally. Source stays on the device.
$ run main.js
✓ process finishedSee output and errors
Read output and exceptions, and stop programs that run too long or print too much.
42Exit code 0 · Local run
Three small steps
Write, run,
understand.
No account, complex project, or Node.js installation needed.
- 1
Create a practice project
Start with Hello World or create a local project containing main.js.
- 2
Run your program
Tap Run and JavaScriptCore executes it on the current device.
- 3
Read the feedback
Review output and exceptions, then try again.
Made for practice
Start with a small program.
JavaScript Starter is now available on the App Store.
Get it on the App StoreContact support