Beside DOM differences, React offers some attributes that simply don't exist in DOM.
key: an optional, unique identifier. When your component shuffles around during
renderpasses, it might be destroyed and recreated due to the diff algorithm. Assigning it a key that persists makes sure the component stays. See more here.
ref: see here.
dangerouslySetInnerHTML: Provides the ability to insert raw HTML, mainly for cooperating with DOM string manipulation libraries. See more here.