Shadow DOM is the cloaking of the insides of a particular element, and thus a tool for web componentization and encapsulation. IIRC, while React encourages buil

Shadow DOM is the cloaking of the insides of a particular element, and thus a tool for web componentization and encapsulation. IIRC, while React encourages building reusable, encapsulated components, it doesn't hide the internal state from view [1]. Perhaps you're thinking Virtual DOM, which is a technique to apply only diff-ed state changes to the real DOM, which isn't actually standardized (yet), although alternate implementations (outside of React) exist? [1] https://facebook.github.io/react/tips/inline-styles.html https://facebook.github.io/react/tips/inline-styles.html