Advanced React Patterns

In modern web development, React has become a dominant library for building user interfaces. This lesson delves into advanced patterns in React, which enable developers to create more maintainable and scalable applications.

2.1 Composition

Composition is a fundamental principle of React. It allows you to build complex UIs from simple components.

2.2 Higher-Order Components (HOCs)

HOCs are functions that take a component and return a new component with added functionality.

2.3 Render Props

A render prop is a function prop that a component uses to know what to render.

3.1 Controlled Components

Controlled components are components that don’t maintain their own state. Instead, they rely on props passed down from their parent component.

function ControlledInput({ value, onChange }) {
    return ;
}

3.2 Context API

The Context API provides a way to pass data through the component tree without having to pass props down manually at every level.

const ThemeContext = React.createContext();

function ThemedButton() {
    const theme = useContext(ThemeContext);
    return Themed Button;
}

3.3 Hooks

React hooks allow you to use state and other React features without writing a class.

const useCounter = () => {
    const [count, setCount] = useState(0);
    return [count, () => setCount(count + 1)];
};

4.1 Keep Components Small

Smaller components are easier to test and maintain. Aim for single responsibility.

4.2 Use PropTypes

Utilize PropTypes to validate the types of props passed to components.

4.3 Optimize Performance

Make use of React.memo and useCallback to avoid unnecessary re-renders.