A live demo showing CSS and DOM isolation between a host page and a remote web component.
Overview
This demo illustrates Shadow DOM encapsulation, a key feature of Web Components that allows them to operate safely on any page without style conflicts.
Live Demo
Host Page Context
I am content on the host page. My styles are global.
Key Observations
- CSS Isolation: The host page’s blue H2 styles do not affect the component’s orange H2. Conversely, the component’s styles do not leak out.
- DOM Isolation: Scripts on the host page cannot easily query elements inside the component’s Shadow DOM.