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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.

Dynamic and Responsive DataTable with Server-Side Processing and Custom Styling

Code October 24, 2024
javascript

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AJAX with JavaScript: A Practical Guide

Tutorial September 18, 2024
javascript

In many real-world applications, you'll need to send data to the server using POST requests. Here's how to send form data using the Fetch API.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>POST Request with Fetch</title>
</head>
<body>
    <form id="postDataForm">
        <input type="text" id="title" placeholder="Enter title" required>
        <input type="text" id="body" placeholder="Enter body" required>
        <button type="submit">Submit</button>
    </form>
    <div id="postDataOutput"></div>

    <script>
        document.getElementById('postDataForm').addEventListener('submit', function(e) {
            e.preventDefault();

            const title = document.getElementById('title').value;
            const body = document.getElementById('body').value;

            fetch('https://jsonplaceholder.typicode.com/posts', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    title: title,
                    body: body
                })
            })
            .then(response => response.json())
            .then(data => {
                document.getElementById('postDataOutput').innerHTML = `
                    <h3>Data Submitted:</h3>
                    <p>Title: ${data.title}</p>
                    <p>Body: ${data.body}</p>
                `;
            })
            .catch(error => console.error('Error:', error));
        });
    </script>
</body>
</html>

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Advanced JavaScript Tutorial for Experienced Developers

Tutorial September 02, 2024
javascript

Reflows and repaints are processes that occur when the layout or appearance of the web page changes. These processes can be expensive, especially if they are triggered frequently.

  • Batch DOM Updates: Instead of making multiple DOM updates in a loop, batch them together to reduce the number of reflows.

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Getting Started with Axios in JavaScript

Tutorial September 02, 2024
javascript

  • data: The actual data returned by the server.
  • status: The HTTP status code.
  • statusText: The HTTP status text.
  • headers: The headers sent by the server.
axios.get('https://jsonplaceholder.typicode.com/posts/1')
  .then(response => {
    console.log('Data:', response.data);
    console.log('Status:', response.status);
    console.log('Headers:', response.headers);
  });

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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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