Candidates often confuse these two concepts because they both involve a representation of the DOM.
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Understand the problem
domarchitectureconcepts
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Attempt it yourself
Sketch your approach before reading the solution — that's what interviews test.
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Give it an honest attempt first — then compare your thinking with the full walkthrough.
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Read the code
Virtual DOM (React) vs Shadow DOM (native)
// Virtual DOM — React diffs this in memory and patches the real DOM
export default function App() {
return <p style={{ fontFamily: "system-ui", padding: 24 }}>React uses a virtual DOM.</p>;
}
// Shadow DOM — a browser API for encapsulation (no React involved):
// const host = document.querySelector("#host");
// const shadow = host.attachShadow({ mode: "open" });
// shadow.innerHTML = "<style>p{color:red}</style><p>Scoped — styles can't leak out</p>";
// The <style> above only affects nodes INSIDE this shadow root.05
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