May 2026
Beginner
358 pages
3h 5m
English
Content preview from Modern Web Design in 30 Days
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19
JavaScript Objects: Modeling Real-World Data
Day 19 of 30
Learning Objectives
By the end of this chapter, you will be able to:
- Explain what JavaScript objects are in plain language
- Create objects with properties and values
- Access and update object properties confidently
- Combine objects with arrays for realworld data modeling
- Loop through object data meaningfully
- Use objects to improve code clarity and structure
- Use AI prompts to reason about data modeling decisions
Vibe Learning Mindset (Chapter Focus)
“Arrays store lists. Objects describe things.”
Real applications don’t just handle values — they handle entities: users, products, posts, settings.
Objects are how JavaScript understands the real world.
What You’re Building Today
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.