May 2026
Beginner
358 pages
3h 5m
English
Content preview from Modern Web Design in 30 Days
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27
Performance, Optimization & Best Practices: Making Websites Fast & Smooth
Day 27 of 30
Learning Objectives
By the end of this chapter, you will be able to:
- Explain what web performance actually means (beyond “speed”)
- Identify common performance issues in beginner projects
- Write more efficient HTML, CSS, and JavaScript
- Reduce unnecessary work in the browser
- Understand when optimization matters—and when it doesn’t
- Apply practical best practices used by professionals
- Use AI prompts to analyze and optimize, not overengineer
Vibe Learning Mindset (Chapter Focus)
“Fast websites feel trustworthy.” Performance is not about chasing perfect scores. It’s about respecting the user’s time, device, and attention.
Good performance is mostly about ...
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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.