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Javascript Programming Tutorials, Guides & Best Practices

Explore 93+ expertly crafted javascript tutorials, components, and code examples. Stay productive and build faster with proven implementation strategies and design patterns from DeveloperBreeze.

JavaScript in Modern Web Development

Tutorial December 10, 2024
javascript

  • With Node.js, JavaScript powers the back-end to handle databases, APIs, and server logic.
  • Examples: REST APIs, real-time collaboration tools like Google Docs.

JavaScript isn't limited to the browser anymore. It's being used in diverse domains:

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AJAX with JavaScript: A Practical Guide

Tutorial September 18, 2024
javascript

The Fetch API is a modern alternative to XMLHttpRequest. It's easier to use, more flexible, and based on Promises, making it simpler to handle asynchronous requests.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>AJAX with Fetch API</title>
</head>
<body>
    <button id="fetchDataBtn">Fetch Data</button>
    <div id="dataOutput"></div>

    <script>
        document.getElementById('fetchDataBtn').addEventListener('click', function() {
            fetch('https://jsonplaceholder.typicode.com/posts/1')
                .then(response => {
                    if (!response.ok) {
                        throw new Error('Network response was not ok');
                    }
                    return response.json();
                })
                .then(data => {
                    document.getElementById('dataOutput').innerHTML = `
                        <h3>${data.title}</h3>
                        <p>${data.body}</p>
                    `;
                })
                .catch(error => console.error('There was a problem with the fetch operation:', error));
        });
    </script>
</body>
</html>

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React Custom Hook for API Requests

Code August 12, 2024
javascript 

import React from 'react';
import useFetch from './useFetch'; // Ensure correct import path

function UserList() {
    const { data, loading, error } = useFetch('https://jsonplaceholder.typicode.com/users');

    if (loading) return <p>Loading...</p>;
    if (error) return <p>Error: {error.message}</p>;

    return (
        <ul>
            {data.map(user => (
                <li key={user.id}>{user.name}</li>
            ))}
        </ul>
    );
}

export default UserList;
  • Reusability: The useFetch hook can be used across different components and applications, reducing code duplication and simplifying API interaction.
  • Loading and Error States: Automatically manages loading and error states, providing a consistent way to handle asynchronous operations.
  • Cleanup Handling: Prevents state updates on unmounted components, reducing potential memory leaks and ensuring stability.

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POST Request with Fetch API and JSON Data

Code January 26, 2024
javascript

No preview available for this content.

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