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    Topic: React Hooks API

    → Introduction to React Hooks

    → useState Hook

    → useEffect Hook

    → useContext Hook

    → useReducer Hook

    → useCallback Hook

    → useMemo Hook

    → Custom Hooks

    Documentation Generation

    Converting React Hooks docs to print-ready PDF

    Chapter 3

    useEffect Hook

    React Hooks API

    The useEffect Hook allows you to perform side effects in your components. Some examples of side effects are: fetching data, directly updating the DOM, and timers.

    Basic Usage:

    useEffect accepts two arguments: a function and a dependency array. The second argument is optional.

    import React, { useState, useEffect } from 'react';
    function Example() {
    const [count, setCount] = useState(0);
    useEffect(() => {
    document.title = `You clicked ${count} times`;
    // Clean-up function (optional)
    return () => {
    document.title = 'React App';
    };
    }, [count]); // Only re-run if count changes
    return (
    <div>
    <p>You clicked {count} times</p>
    <button onClick={() => setCount(count + 1)}>
    Click me
    </button>
    </div>
    );
    }
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