Exploring Vanilla JS Patterns
Nikos Katsikanis - June 13, 2025
Why Patterns Matter
Vanilla JavaScript offers complete control over your codebase. When you understand every line you ship, you can craft the user experience exactly the way you want.
Using simple, consistent patterns keeps your project organized and easy to extend. The code in this project runs directly in the browser—no bundler or build step required. This simplicity makes it easier to understand what's going on and reduces potential points of failure.
Freedom from Lock-in
Frameworks add layers of abstraction, but sometimes a lightweight approach is all you need. By sticking to standard browser APIs, you retain the freedom to move your code anywhere without rewriting core logic.
Mix and match any tools or libraries you like, knowing that any developer familiar with plain HTML, CSS, and JavaScript can dive right in.
Performance
Less code often leads to faster load times and easier maintenance. When there is no build pipeline, there is also no build breakage to chase down.
Modern browsers are highly optimized—skipping unnecessary abstraction layers yields snappier apps and fewer dependencies to keep up-to-date.
Component Composition
Breaking your UI into reusable components promotes separation of concerns and improves readability. For instance, the navigation bar and blog list are independent elements that can be mixed and matched as needed.
Each component can be tested independently and then combined to create richer features. This modular approach is great for small sites and scales surprisingly well.
State Management
Instead of relying on heavy frameworks, you can manage state using plain JavaScript objects and custom events. The store module in this repo demonstrates how a simple pub/sub pattern can handle shared state.
This lightweight approach is powerful enough for many small to medium-sized projects. With these patterns, you can build maintainable applications without heavy dependencies.
Learning Opportunity
Building features from scratch teaches you how the web actually works. Understanding the fundamentals makes debugging easier and lets you innovate.
Even if you later adopt a framework, this knowledge pays dividends—and if you ever decide to go framework-free again, you’ll already know the path.