Learn JQUERY with Real Code Examples
Updated Nov 23, 2025
Practical Examples
Modals and dropdowns
Dynamic forms
Sliders and carousels
AJAX-loaded content
Interactive legacy dashboards
Troubleshooting
Check if jQuery is loaded before use
Verify correct selectors
Avoid conflicting `$` with other libraries
Debug chaining errors
Ensure AJAX endpoints return proper JSON
Testing Guide
Use Jest or Mocha with JSDOM
Test event triggers
Test DOM updates
Mock AJAX with Sinon
Unit test custom plugins
Deployment Options
CDN delivery
Self-hosted script
Bundled via Webpack/Vite
Inline script for simple tasks
Integration into CMS themes
Tools Ecosystem
jQuery UI
jQuery Mobile
jQuery Validation plugin
jQuery DataTables
Thousands of community plugins
Integrations
Works with any backend (PHP, Node, Rails)
WordPress themes
Drupal & Joomla extensions
Bootstrap components (older versions)
AJAX APIs for CRUD operations
Productivity Tips
Cache selectors
Use chaining for efficiency
Use `.on()` with delegation
Use plugins for reusability
Write tiny utilities for repeated actions
Challenges
Build a modal from scratch
Create a carousel
Build form validation system
Make a mini SPA using AJAX
Develop a reusable plugin