BitWithBite
JavaScript Worksheet
⚡ Objects
SCORE___ / 20
NameClassDate
After this worksheet you can
Create objects with key:valueDot vs bracket accessAdd/update propertiesLoop with Object.keys📚 Quick Recap
🎯 What you'll learn: How to create and work with JavaScript objects — the foundation of almost every JS program. You'll master object literals, dot and bracket notation, methods, this, destructuring, spread, JSON, optional chaining, and Object utility methods.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1const u={name:'Ali'}; u.name is:
2Bracket access looks like:
3Add age with:
4Object.keys(u) returns:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5Objects store :value pairs.
6u. = 'Lahore' adds a city.
7Create an object for a book (title, pages).
8Read pages with brackets.
9Loop and log every key of book.
🚀 Section C · Challenge ● CHALLENGE 5
10Dot vs bracket - when must you use brackets?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
Teacher's Signature
Parent's Signature
✂ answer key — fold or cut before handing out
1-B 2-B 3-A 4-B | 5 key 6 city 7 = const book={title:'JS', pages:120}; 8 = book['pages'] 9 = for(const k of Object.keys(book)) console.log(k) | 10 = Dynamic keys or keys with spaces/dashes