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 editor controls, and JavaScript Modules for efficient code—all without external libraries.

WordPress Dev's resource offers insights, tutorials, and resources for WordPress developers and website administrators. Readers can learn about WordPress development techniques, plugin development, and theme customization. With articles, tutorials, and troubleshooting guides, WordPress Dev provides  guidance and expertise for building and maintaining WordPress-powered websites.

WordPress Developer

WordPress provides four complementary APIs for extending core blocks with interactive features. The Interactivity API handles frontend reactivity through declarative directives, the HTML API safely processes server-side markup, the Format API adds custom toolbar controls for editors, and JavaScript Modules enable efficient code loading. This tutorial demonstrates building a word-switching animation by combining these APIs: editors mark text via a custom format button, PHP injects interactivity directives during rendering, and a reactive store manages the animation cycle—all without external dependencies.

Word Switcher: Extending Core Blocks with Interactivity

Server-Side HTML Processing with the HTML API