Official WordPress developer resources including a code reference, handbooks (for APIs, plugin and theme development, block editor), and more.

Dec 10, 2025 · Learn to build a smooth word-switching effect in WordPress by combining four key APIs: HTML API for markup transformation, Interactivity API for animations, Format API for …

Jun 18, 2019 · This handbook serves as a clearinghouse for documentation on all APIs present within the WordPress software as well as APIs available from the WordPress.org ecosystem.

Nov 6, 2023 · For those cases, you should use WordPress’ built-in block stylesheets system. In this article, you will learn how to register per-block stylesheets, but remember that theme.json …

Jul 30, 2014 · The Plugin Developer Handbook is a resource for all things WordPress plugins. Whether you’re new to WordPress plugin development, or you’re an experienced plugin …

Apr 25, 2019 · WordPress is a big project with thousands of contributors. It’s important that best practices are followed so that the codebase is consistent and readable, and changes are easy …

Nov 8, 2016 · Using the WordPress REST API you can create a plugin to provide an entirely new admin experience for WordPress, build a brand new interactive front-end experience, or bring …

Nov 21, 2023 · As described in Theme Structure, WordPress requires that all themes include a style.css file. Its most important function is to “register” the theme with WordPress through …

WP-CLI Commands In this article Below is a listing of all currently available WP-CLI commands with links to documentation on usage and subcommands. Looking to learn more about the …

Jul 2, 2025 · Here you’ll find everything you need to know to sound great on the Developer Blog. You’ll also find the whole publishing process—every step from proposing a topic and getting it …