Why Use Web Components?
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Advantages of Web Components
| Characteristic | Web Components | Frameworks (React/Vue) |
|---|---|---|
| Style Encapsulation | ✅ Browser level | ❌ Requires CSS-in-JS |
| Portability | ✅ Works everywhere | ❌ Depends on ecosystem |
| Performance | ✅ Native implementation | ⚠️ Virtual DOM |
✅ Native and standard. This is a web standard supported by all modern browsers. You don't need additional libraries to use them (although they can make life easier).
✅ Compatibility. A web component created once will work with any framework (React, Vue, Angular, Svelte) or even without one. It's an ideal solution for creating cross-framework UI libraries or for gradually modernizing legacy projects.
✅ True encapsulation. Shadow DOM solves the CSS conflict problem at the browser level.
✅ Reusability. Create a component once — use it in dozens of different projects, regardless of the technologies chosen in them.
✅ Browser integration. Components are full-fledged DOM elements. They work with standard JavaScript methods like querySelector, addEventListener, and can be manipulated just like any other HTML element.
Who needs this and for what?
- Browser extension developers, where isolation of styles and logic is critical.
- Design system and UI library creators who want their components to work everywhere.
- Teams with large and complex projects, where parts of the application may be written in different frameworks or where gradual migration from old codebase is happening.
- Everyone who values long-term code support. Standards, unlike frameworks, evolve more slowly and are backward compatible.
What's next?
Web Components are not a "React or Vue killer." They are a low-level platform standard. High-level frameworks still provide tremendous value: reactivity, state management system, application state management, and much more.
Web Components and modern frameworks work great together. Frameworks can use web components as regular HTML tags, and can themselves compile their components into web components for distribution.
In this guide, we'll break down each technology included in the Web Components standard in detail, learn how to create our own components, and integrate them into real projects.
Let's dive into the world of component-based web development!