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The Diffing Algorithm: DOM Elements Of The Same Type
DOM Elements Of The Same Type
//by comparing these two elements, React knows to only modify the
//className on the underlying DOM node
<div className="before" title="stuff" />
<div className="after" title="stuff" />When comparing two React DOM elements of the same type, React looks at the attributes of both, keeps the same underlying DOM node, and only updates the changed attributes.