Quick Guide to React's Essential Hooks

React hooks are essential tools for managing state and side effects in functional components.

1. useState: This hook allows you to set state on a functional component. It returns an array containing the current state value and a function for updating it.

    const [state, setState] = useState(initialState);
   

2. useEffect: This hook enables you to implement side effects in your components, like as data fetching or DOM manipulation. It runs after rendering and can optionally clean up.

    useEffect(() => { 
    /* side effect code */ 
        return () => { 
        /* cleanup code */ 
        }; 
    }, [dependencies]);
   

3. useContext: This hook allows you to transmit data through the component tree without sending props down at each level. It accepts a context object and returns its current value.

    const contextValue = useContext(MyContext);
   

4. useRef: This hook generates a mutable object that persists across renders. It is widely used for directly referencing DOM elements or storing changeable information.

    const myRef = useRef(initialValue);
   

These hooks simplify state management, handle side effects, and manage context and reference elements in React, making your code more efficient and easier to read.

References:

• React Documentation: Hooks API Reference

• useState Hook

• useEffect Hook

• useContext Hook

• useRef Hook