Types of React Components

A component encapsulates a user interface element. It controls UI structure and behaviour by maintaining state or receiving props and rendering content.

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There are two main React components: 

1. Functional components - are simpler and desirable for most uses. These JavaScript functions return React elements. Functional components can now manage state and lifecycle events with React Hooks. Features are

• Stateful or stateless: React Hooks manage state.
• Small, reusable components benefit from simpler syntax. 
• Since no ‘this’ keyword is needed, they perform faster.

 

2. Class components React.Component-extending ES6 classes are class components. Additional features include state management and lifecycle mechanisms. 

State and props determine how components render DOM output. React optimises efficiency by loading just relevant components. Only the Component updates, not the page.

Nesting components 

in React creates a modular, hierarchical structure. Components can be reused within or between components. Nested components can receive props for dynamic content.

React Component Best Practices 

• Small Components: Each component should excel at one thing.
• Use functional components unless lifecycle methods or error boundaries are needed. 
• Validate Prop: PropTypes enforce prop types.
• Lift state to nearest common ancestor when several components demand access.