Q1: What is the Virtual DOM and how does React use it?
The Virtual DOM is a lightweight in-memory representation of the real DOM. When state changes occur, React creates a new Virtual DOM tree, compares it with the previous one using a diffing algorithm (Reconciliation), and batch updates only the changed elements in the real DOM for optimal performance.
Key Takeaways
- Virtual DOM minimizes direct real DOM manipulations to boost rendering performance.
- React uses a diffing algorithm during Reconciliation to compute minimal real DOM updates.
Knowledge Check
What process does React use to compare the new Virtual DOM with the previous one?