React Explained: Virtual DOM, Components, and State Through a Mall Analogy

A DEV Community article uses a shopping mall metaphor to explain how React works internally, mapping core concepts like components, props, state, and the Virtual DOM to familiar real-world equivalents. Before React, every website update required directly manipulating the live DOM, much like rearranging a shop floor in front of customers — a slow and error-prone process. jQuery sped up these manual changes but did not eliminate the need to plan and execute each update individually. At Facebook's scale, with millions of simultaneous users triggering thousands of DOM updates per second, this approach became unmanageable. React introduced the Virtual DOM — a private design studio where changes are drafted, compared against the current state via a diffing process, and only the minimal necessary updates are applied to the real DOM.