jQuery 4 (legacy code and migration to DOM APIs)
The planned outline of 8 modules. Lessons are written, run and reviewed before they are published.
Planned outline
- Module 1
Start here: jQuery
Coming soon - Module 2
Selecting, reading and changing the page
Coming soon - Module 3
Events, timing and effects
Coming soon - Module 4
Ajax, Deferreds and forms
Coming soon - Module 5
Upgrading to jQuery 4
Coming soon - Module 6
Platforms, plugins and jQuery UI
Coming soon - Module 7
Migrating to modern DOM APIs
Coming soon - Module 8
Security, performance and client work
Coming soon
Related tools
HTML, CSS & JS Playground (Online Editor) A CodePen-style editor with live preview and console — private, sandboxed, no sign-up. JavaScript Formatter Turn minified or messy JavaScript into readable, consistently indented code. Content Security Policy (CSP) Generator Build a strict, working CSP with hashes, reporting and ready-to-paste server config. HTTP Status Codes Reference Every HTTP status code explained: what it means, why you got it and how to fix it. REST API Tester (Online API Client) A Postman-style API client in this tab — requests go straight from you to the API. HTML Entity Encoder & Decoder Escape text for HTML, or decode &, © and → exactly as a browser would.
Official documentation
- api.jquery.com (api.jquery.com)
- jquery.com/upgrade-guide/4.0 (jquery.com)
- github.com/jquery/jquery-migrate/blob/main/warnings.md (github.com)
- dom.spec.whatwg.org (dom.spec.whatwg.org)
More in Web development
- HTML (coming soon)
- CSS (coming soon)
- React (coming soon)
- Node.js & Express (coming soon)
- All Web tracks
- How we make lessons