basics

Lifting state up is a pattern where the state of a child component is moved to its parent component, allowing multiple child components to share the same state.

State is internal to a component and can be changed over time, while props are external and passed to a component.

State is an internal data store that belongs to a specific component, and it can be changed over time. Props are properties passed to a component from its parent, and they are immutable.

Keys are used to uniquely identify and differentiate between components in React. They help React identify which items have changed, added, or removed.

The virtual DOM is a lightweight copy of the actual DOM in memory. React uses it to improve performance by updating only the changed parts of the actual DOM.