Modern JavaScript Essentials
for Real-world Development
LAB · Modern or Not?
Modern or Not?
JavaScript Syntax Challenge
Drag each snippet to OLD-STYLE JS or MODERN JS. Designed as a quick syntax-recognition warm-up.
let / const
Template Literals
Arrow Functions
Default & Rest
Destructuring
Spread
Optional Chaining / ??
ES Modules
Drag the snippet — or simply click a zone.
❌ OLD-STYLE JS
Traditional / less modern pattern
✨ MODERN JS
Modern ES6+ / defensive syntax
Restart
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