Introduction to Web Components: Framework-Agnostic UI

Web Components are the platform's answer to reusable UI. They work everywhere—React, Vue, Angular, or vanilla JavaScript—making them the ultimate portable component solution.

Custom Elements

Custom elements let you define new HTML tags with encapsulated behavior. Extend HTMLElement to create components that work like native HTML elements.

Shadow DOM

Shadow DOM provides style and markup encapsulation. Your component's styles won't leak out, and the host page's styles won't leak in.

HTML Templates

The template and slot elements let you define reusable markup structures. Templates are parsed but not rendered until instantiated, improving performance.

Interop with Frameworks

Web Components can be used inside React, Vue, and other frameworks. Some frameworks need special handling for custom events and properties, but the interop story is strong.